Could Cannabis Cure Professor Ramos Blog

Could Cannabis Cure FDA Approves CBD Drug Epidiolex This video titled â€Å"FDA Approves CBD Drug Epidiolex† by Dean, from the YouTube channel called CBD School, was very informational and easy to understand and I gave it 8 out of 10 stars. It informs the viewer that a new cannabidiol (CBD) based medicine derived from the marijuana plant called Epidiolex was just approved by the FDA. It was developed by GW Pharmaceuticals to mainly treat two rare forms of epilepsy, Lennox-Gastaut syndrome and Dravet syndrome. These two types of epilepsy are frequently resistant to treatment yet cannabidiol has been showing promising signs for treatment. This approval will help not only the patients with this condition but also the cannabidiol industry as well to get more credible in the modern world of medicine. This video gave enough information for anyone to get a grasp of the main idea so then after it they could even watch more videos he has made or go look to the research itself. His demeanor was a little bit stiff yet he spoke clearly. He tried to repeat his topics so that we would not forget them during the middle of it which was helpful as well as talked about other cannabis products to plug his other videos into this one. That was a smart move because then you want to continue watching. Again, this video was 8 out of 10 stars and the only reason it got two below perfect was that it didn’t explain the scheduling for the DEA that much or about cannabidiol itself. So in addition to this video, here is some information I have gathered to piece the video together a bit more for those who don’t quite understand everything he is saying. First I want to explain what epilepsy is for those who have never heard of it or know very little about it. In an article about cannabidiol and epilepsy it defines epilepsy as, â€Å"uncontrolled seizures, which can be associated with poor quality of life and mental illness† which effects roughly 50 million people worldwide (Ali, Scheffer Sadleir 1). Yet as Ali et al. states, â€Å"The most severe group of childhood epilepsies are the developmental and epileptic encephalopathies (DEEs)†¦ devastating disorders are defined by frequent seizures and epileptiform abnormalities that result in severe cognitive and behavioral impairment† with about 24% of them dying within 20 years of being diagnosed (1). Dravet syndrome is a prototypic DEE so it stems from the more severe group of epilepsies which makes it harder to treat with regular antiepileptic drugs. In the results of one of the main studies of Epidiolex that was approved by the FDA reveals that, â€Å"This randomi zed, controlled trial showed that cannabidiol resulted in a greater reduction in convulsive seizure frequency than placebo among children and young adults with drug-resistant Dravet syndrome† (Devinsky, Ottin, et al., 2018). This is great news because it shows that these drug resistant syndromes have a weakness. Also, it is the small victories with cannabidiol that could lead to the rescheduling of this plant so we can find other medicinal ways that it could help the world. Now since the cannabis plant is still considered a Schedule One drug it was hard to get the FDA, let alone the DEA, to approve any medicine that was derived from this plant. What a does it mean to be a Schedule One drug? Well on the DEA website it states, â€Å"Schedule I drugs, substances, or chemicals are defined as drugs with no currently accepted medical use and a high potential for abuse. Some examples of Schedule I drugs are: heroin, lysergic acid diethylamide (LSD), marijuana (cannabis), 3,4-methylenedioxymethamphetamine (ecstasy), methaqualone, and peyote†. With the studies that have been proving that the cannabis plant has medicinal values it was only a matter of time before the FDA and DEA had to reconsider this scheduling. For those who do not know what cannabidiol is, let me give you a little background information. In an article about the safety and side effects of cannabidiol it states, â€Å"In contrast to D9-THC, it is nonintoxicating, but exerts a number of beneficial pharmacological effects. For instance, it is anxiolytic, anti-inflammatory, antiemetic, and antipsychotic. Moreover, neuroprotective properties have been shown†¦ could be used at high doses for the treatment of a variety of conditions ranging in psychiatric disorders such as schizophrenia and dementia, as well as diabetes and nausea† (Iffland Franjo 139) In other words, cannabidiol has been shown to have medically beneficial properties as well as being non-psychoactive. What that means is that unlike the tetrahydrocannabinol, THC, it does not get you â€Å"high†. Regarding this information it is easy to see why to most want to utilize this part of the cannabis plant for its medicinal purposes and why GW Pharmaceu ticals did just that. On their website it states, â€Å"GW has established a world leading position in the development of plant-derived cannabinoid therapeutics through its proven drug discovery and development processes, intellectual property portfolio and regulatory and manufacturing expertise†¦was founded in 1998 and is listed on the NASDAQ Global Market (GWPH). The company has operations in both the US and the UK†. With this company gaining recognition, I hope to see more products from them that could be used by others without epilepsy as well. Hopefully videos like this will help to keep spreading the word about all the medically beneficial ways that cannabis can help the world. That is another reason why I gave it such a high rating. Usually when you watch videos about cannabis, the person in it could be intoxicated from the THC and may not get to the point they are trying to make. In regards to this one I think he set a great example of how informational videos about cannabis should be. Easy to hear and easy to understand. Thanks Dean for the info! WORKS CITED: Ali, Shayma, Ingrid E. Scheffer, and Lynette G. Sadleir. Efficacy of cannabinoids in paediatric epilepsy.  Developmental Medicine Child Neurology  (2018). Devinsky, Orrin, et al. Trial of cannabidiol for drug-resistant seizures in the Dravet syndrome.  New England Journal of Medicine  376.21 (2017): 2011-2020. Iffland, Kerstin, and Franjo Grotenhermen. An update on safety and side effects of cannabidiol: a review of clinical data and relevant animal studies.  Cannabis and Cannabinoid Research  2.1 (2017): 139-154. Wise, Jacqui. FDA approves its first cannabis based medicine. (2018): k2827. â€Å"Drug Scheduling.†Ã‚  DEA, www.dea.gov/drug-scheduling. â€Å"About Us.†Ã‚  GW Pharmaceuticals, Plc, gwpharm.com/about.

Programming Languages Comparison

Programming Languages Comparison Since the 1950s, computer scientists have devised thousands of programming languages. Many are obscure, perhaps created for a Ph.D. thesis and never heard of since. Others became popular for a while then faded due to lack of support or because they were limited to a particular computer system. Some are variants of existing languages, adding new features like parallelism- the ability to run many parts of a program on different computers in parallel. Read more about What is a programming language? Comparing Programming Languages There are several ways to compare computer Languages but for simplicity, well compare them by Compilation Method and Abstraction Level. Compiling to Machine Code Some languages require programs to be transformed directly into Machine Code- the instructions that a CPU understands directly. This transformation process is called compilation. Assembly Language, C, C, and Pascal are compiled languages. Interpreted Languages Other languages are either Interpreted such as Basic, Actionscript, and Javascript, or a mixture of both being compiled to an intermediate language - this includes Java and C#. An Interpreted language is processed at runtime. Every line is read, analyzed, and executed. Having to reprocess a line every time in a loop is what makes interpreted languages so slow. This overhead means that interpreted code runs between 5 - 10 times slower than compiled code. The interpreted languages like Basic or JavaScript are the slowest. Their advantage is not needing to be recompiled after changes and that is handy when youre learning to program. Because compiled programs almost always run faster than interpreted, languages such as C and C tend to be the most popular for writing games. Java and C# both compile to an interpreted language which is very efficient. Because the Virtual Machine that interprets Java and the .NET framework that runs C# are heavily optimized, its claimed that applications in those languages are as fast if not faster as compiled C. Level of Abstraction The other way to compare languages is level of abstraction. This indicates how close a particular language is to the hardware. Machine Code is the lowest level,  with Assembly Language just above it. C is higher than C because C offers greater abstraction. Java and C# are higher than C because they compile to an intermediate language called bytecode. How Languages Compare Fast Compiled Languages Assembly LanguageCCPascalC#Java Reasonably Fast Interpreted PerlPHP Slow Interpreted JavaScriptActionScriptBasic Machine Code is the instructions that a  CPU  executes. Its the only thing that a CPU can understand and execute.  Interpreted  languages need an application called an  Interpreter  that reads each line of the program source code and then runs it. Interpreting Is Easier Its very easy to stop, change and re-run applications written in an interpreted language and that is why theyre popular for learning programming. There is no compilation stage needed. Compiling can be quite a slow process. A large Visual C application can take from minutes to hours to compile, depending on how much code has to be rebuilt and the speed of memory and the  CPU. When Computers First Appeared When computers first became popular in the 1950s, programs were written in machine code as there was no other way. Programmers had to physically flip switches to enter values. This is such a tedious and slow way of creating an application that higher level computer languages had to be created. Assembler: Fast to Run- Slow to Write! Assembly language is the readable version of Machine Code and looks like this Mov A,$45 Because it is tied to a particular CPU or family of related CPUs, Assembly Language is not very  portable  and is time-consuming to learn and write. Languages like C have reduced the need for Assembly Language programming except where RAM is limited or time-critical code is needed. This is typically in the  kernel  code at the heart of an Operating System or in a video card driver. Assembly Language Is the Lowest Level of Code Assembly Language is very low level; most of the code just moves values between the  CPU  registers and memory. If you are writing a payroll package you want to think in terms of salaries and tax deductions, not  Register  A to Memory location XYZ. This is why higher level languages like C,  C#  or  Java  are more productive. The programmer can think in terms of the problem domain (salaries, deductions, and accruals) not the hardware domain (registers, memory, and instructions). Systems Programming With C C was devised in the early 1970s by Dennis Ritchie. It can be thought of as a general purpose tool- very useful and powerful but very easy to let bugs through that can make systems insecure. C is a low-level language and has been described as portable Assembly language. The syntax of many scripting  languages is based on C, for example,  JavaScript, PHP, and ActionScript. Perl: Websites and Utilities Very popular in the  Linux  world, Perl was one of the first web languages and remains very popular today. For doing quick and dirty programming on the web it remains unrivaled and drives many websites. It has though been somewhat eclipsed by  PHP as a web scripting language. Coding Websites With PHP PHP  was designed as a language for Web Servers and is very popular in conjunction with Linux, Apache, MySql, and PHP or LAMP for short. It is interpreted, but pre-compiled so code executes reasonably quickly. It can be run on desktop computers but is not as widely used for developing desktop applications. Based on C  syntax, it also includes  Objects  and Classes. Pascal  was devised as a teaching language a few years before C but was very limited with poor string and file handling. Several Manufacturers extended the language but there was no overall leader until Borlands Turbo Pascal (for Dos) and Delphi (for Windows) appeared. These were powerful implementations that added enough functionality to make them suitable for commercial development. However, Borland was up against the much bigger Microsoft and lost the battle. C: A Classy Language! C or C plus classes as it was originally known came about ten years after C and successfully introduced Object Oriented Programming to C, as well as features like exceptions and templates. Learning all of C is a big task- it is by far the most complicated of the programming languages here but once you have mastered it, youll have no difficulty with any other language. C#: Microsofts Big Bet C#  was created by  Delphis architect Anders Hejlsberg after he moved to Microsoft and Delphi developers will feel at home with features such as Windows forms. C#  syntax  is very similar to  Java, which is not surprising as Hejlsberg also worked on J after he moved to Microsoft. Learn C# and you are well on the way to knowing  Java. Both languages are semi-compiled so that instead of compiling to machine code, they compile to  bytecode  ( C# compiles to  CIL  but it and Bytecode are similar) and are then  interpreted. Javascript: Programs in Your Browser Javascript  is nothing like Java, instead, its a  scripting  language based on C syntax but with the addition of  Objects  and is used mainly in browsers. JavaScript is interpreted and a lot slower than  compiled  code but works well within a browser. Invented by Netscape it has proved very successful and after several years in the doldrums is enjoying a new lease of life because of  AJAX; Asynchronous Javascript and XML. This allows parts of web pages to update from the server without redrawing the entire page. ActionScript: A Flashy Language! ActionScript  is an implementation of JavaScript but exists solely within Macromedia Flash applications.  Using vector-based graphics, it is used mainly for games, playing videos and other visual effects and for developing sophisticated user interfaces, all running in the browser. Basic for Beginners Basic  is an acronym for Beginners All-purpose Symbolic Instruction Code and was created to teach programming in the 1960s. Microsoft has made the language their own with many different versions including VBScript for websites and the very successful  Visual Basic. The latest version of that is VB.NET and this runs on the same platform  .NET  as C# and produces the same CIL bytecode. Lua is a free scripting language written in C that includes garbage collection and coroutines. It interfaces well with C/C and is used in the games industry (and non-games as well) to script game logic, event triggers, and game control. Conclusion While everyone has their favorite language and has invested time and resources in learning how to program it, there are some problems that are best solved with the right language. E.G you wouldnt use C for writing web apps and you wouldnt write an Operating System in Javascript. But whichever language you choose, if its C, C or C#, at least you know youre in the right place to learn it.

Inflating Value Essay Example | Topics and Well Written Essays - 750 words

Inflating Value - Essay Example One ethical issue that prevails in Jack’s case is the conflict of interest regarding the moral uprightness in professional undertakings. Apparently, there are conflicting values as to whether Jack should prioritize professional integrity, or whether he should prioritize the interests of his superiors. Apparently, changing the peer group would undervalue ABC Lighting and increases the potential of upsetting superiors, especially the managing director and the client; hence compromising Jack’s prospects of being touched by the investment bank after graduation. On the contrary, knowingly inflating the value of the company constitutes the lack of integrity in duty performance. In essence, conflicts of interest emerge whenever employees feel obliged to please and respect a rigid chain of command within an organization. When under conflicts of interest, employees are expected to uphold the ethical principle of integrity.Apparently, the investment bank has an extremely strict c hain of command. In such organizational cultures, subordinate employees can only report to their immediate superiors. Therefore, Jack should report the issue to David, his Associate. As a financial analyst, Jack is professionally obliged to perform his duties in an objective and accurate manner. Therefore, he should mention that to the best of his knowledge, the peer group selected for the valuation exercise by his Associate is not accurate, and that he is technically conflicted as to whether due diligence should be followed in selecting companies to form the right peer group.

Russban Plastics Essay Example | Topics and Well Written Essays - 1000 words

Russban Plastics - Essay Example It means that Jack together with the minor shareholders will not be able to vote for the approval of the company's dissolution; he needs to be in agreement with Ben. Therefore, Andy and Ben will be able to continue their business. However, it is recommended to negotiate with Jack and other shareholders, because their strong dissatisfaction may lead to opposition to approval of the investment decisions and bring company to a halt. 3. In order to buy out the shareholders and remaining shares at par value, and to obtain a full control over the Russband's operations, a loan of ( 120,000 - 60,000 - 21,000) + ( 250,000 - 160,000) = 169, 000 will be necessary. The bank will not have a positive view of the loan, as the amount of the loan is quite substantial, and the company's expansion plans would have to be shelved for another year. It means, at least, two more consequent years of losses and there is no proof that the market conditions afterwards will be favourable and allow achieving considerable profits. Whether the loan will be granted will depend on Ben and Andy's ability to provide a sound financial plan indicating that the company in the future will be able to generate enough cash to make principal and interest payments, and on the presence of appropriate collateral. Russban Plastics has sufficient authorized capital, more than 25% of it issued and satisfactory amount of the paid-up capital. To change the status from private to a PLC company it will need to seek certificate of trading and incorporation from the authorities before starting the financing activities. Afterwards, it will also need to submit latest financial reports and made the news and information that are likely to affect the price available to the market. In order to join AIM the company will need to: Appoint an advisor and a broker; Submit a declaration of business interest; Submit an admission document; Pay admission fee of 4,000; Incur the advisor's fees ranging from 300,000 up to 1,000,000 and 2%-5% flotation cost. Generally speaking, while going public offers an opportunity to raise a significant amount of additional funding, it will require substantial spending of the management time and costs. 5. The incremental investment amount, taking into account sale of the existing premises for 500,000, would be equal to 500,000. According to the Gordon Growth Model cost of equity will be equal to: Ce = D1/p0 + g = (50 p*0.06* (1 + 0.01))/50 p + 1% = 7.1% Considering also cost of

Different Types Of Retaining Wall Systems Available Construction Essay

Different Types Of Retaining Wall Systems Available Construction Essay As a Construction Management Consultant of I-Consult Ltd appointed by I- Build Sdn Bhd, I am required to propose different types of retaining wall system available. My proposal focuses on the site investigation, importance of retaining wall, construction methods, design concepts and preventive measures to mitigate functional failures. I am required to propose an appropriate selection of the most suitable retaining wall system used to the Board of Directors, in which the project is located at hilly area which consists of 20 units of luxury bungalows. In this proposal, I am going to discuss: the importance of site investigation, the importance of retaining wall, the concept of retaining wall, types of retaining wall the most suitable retaining wall for this hilly project. The Importance of Site investigation Every man-made civil engineering structure is found on, in or with ground. The structure we put on the ground is man-made. We can control to design every item that goes into our structure, such as concrete, reinforcement, bricks and even the last wall plug. However, the ground below on which this structure will stand is not man-made. We usually have less knowledge about it and we undoubtedly cannot design or control its behavior. The ground below will determine the economies of how tall, how heavy, how safe the final structure is going to be and not the other way round. In short, the safety and economics of every civil engineering structure is influenced by the properties of the ground on which this structure will stand. These properties of the ground below or sub-soil properties are obtained via Site Investigation. In any site investigation work, the questions which should be resolved in determining the investigation program are: What type of investigation is needed, Why they are needed, Where the actual field works should be performed, How the work is to be done. Whether the investigation is sufficient or too much. Site investigation is normally crucial and carried out prior to the commencement of design of a construction project. Site investigation has been defined as investigation of the physical characteristics of the site and includes documentary studies, site surveys and ground investigation. It is also refers to the actual surface or subsurface investigation, including on site and laboratory tests. In broad sense, study of the site history and environment, interpretation and analyses of all available data, and making recommendations on the favorable/unfavorable locations, economic and safe design, and prediction of potential risks should also be included in site investigations. First and foremost, a desk study to reveal data which may already exist concerning the site, its geology and history, together with a site reconnaissance, is invaluable and can be done before purchase at minimal cost. This may be followed by trial pitting, probing or boring as appropriate to the conditions revealed by preceding studies and in the light of the development proposals. It is also a precaution to minimize damage that could be caused by these soils could also be communicated at this stage. At least home dwellers would be alerted to potential problems (and the associated costs) from the outset, thus enabling them to make informed decisions regarding the most appropriate foundation system for their homes. Site investigation is designed to identify the characteristics of soils or fill materials which lie beneath the site, the groundwater conditions and the existence and extent of other physical features or contaminants which may be present. This information influences the selection and design of an appropriate structural form for the proposed building. It is a process which should continue on an iterative basis throughout the design and construction phases. Post-construction monitoring can also be of importance in many instances as part of a validation process. The combined building loads indicated in figure 1 must be safely supported by the subsoil and also ensure that unreasonable movements of the building do not occur. If the supporting soil is sufficient resistant and its characteristics under load are likely to remain satisfactory, the problems of support and movement will be easily resolved. However, few soils other than rock can resist these concentrated loads and it is usually necessary to collect the resolved loads at their lowest point and transfer them to adequate bearing soil known to be available on a particular site (figure 2). Figure 1: Combined building loads Figure 2: Method of transferring combined building loads to supporting soil. The general distribution of soil types in the United Kingdom is indicated in figure 3; the soils include peat, clay, slit, sand and gravel. Corresponding safe bearing pressures are also given. Figure 3: simplified distribution of various types of supporting soils Lastly, site investigation should be undertaken by professional specialists, such as surveyors, geotechnical engineer and ground investigation contractor, and in a phased manner. The ground investigation contractor is responsible for providing reliable factual data. The geotechnical consultant should responsible for the planning execution of the investigation program, interpretation and analyses of results, and making appropriate design recommendations to avoid over design as well as unsafe design. Failure of Site Investigation Due to lack of or inadequacy of guide/code requirement regarding the extent as well as quality of site investigation work, geotechnical failures often occurred. These failures sometime led to catastrophic disaster and imposed serious threat to public safety. For the Highland Incident in Kuala Lumpur in 1993, the Architect appointed qualified civil engineer to be the consulting engineer for Highland Towers. Initially, civil engineers scope of works was restricted to the structural aspect of the three blocks. But subsequently, the civil engineer was engaged by the developer to submit proposals over the drainage of the area. His drainage plan was approved. He was also retained by the developer to design and supervise the construction of two retaining walls on the Highland Towers site. The Plaintiffs claimed that the civil engineer was negligent for the following reasons: (i) Designing unsuitable foundations; (ii) Lack of care and concern of the hill and slope; (iii) Issuing a notice to the authorities confirming the drainage works was completed when only a fraction of it was done. By the above acts of preparing, designing and supervising the construction of Highland Towers and the drainage system of the Highland Towers site, he was negligent and had caused nuisance to them. The civil engineer had used rail piles welded together as foundation to support the three apartment blocks. This type of piles, which was considered inferior to concrete piles, was accepted in the engineering and building industry to support high-rise buildings at the material time. Thus, no fault can be attributed to the civil engineer in using the rail piles as he was only adhering to the accepted professional practice at that time. However, there was lack of consideration by the civil engineer to the hill and the slope directly behind the three blocks. The court ruled that the civil engineer should have reasonably foreseen the danger of a landslide producing a lateral load against the foundation of the building. For this, he should have exercised care to either design or construct a foun dation to accommodate the lateral load or ensure that the slope was reasonably stable. Failure to do so is a breach of his duty of care he owes to the Plaintiffs since his duty was to ensure the safety of the buildings he designed and built. The civil engineers attempt to deny liability on the ground that he relied on the developer to ensure that other retaining walls were constructed properly was unsuccessful. The judge found that it was incumbent upon the civil engineer to enquire and ascertain whether the work was that of a qualified professional and what its impact might be on the safety of his own building. Figure 4: Highland Incident in Kuala Lumpur in 1993 What is Retaining Wall? A retaining wall is a stabilizing structure designed and constructed to retain soil at a slope that is greater than it would naturally assume, usually at a vertical or near-vertical position. Besides, the retaining wall used to prevent the erosion and the movement of soil. The function of retaining wall is to resist the lateral pressure of soil when there is a desired change in ground elevation that exceeds the natural slope taken by the soil which is called the angle of repose of the soil. The retaining wall is the wedge of soil resting on this upper plane of the angle of repose that a retaining wall has to support. It is also designed with weep holes which allow collected water to escape. This releases the additional pressure created by a accumulated water and helps in stabilizing the retaining wall. The walls are designed to offer the necessary resistance by using their own mass to resist the thrust or relying upon the principles of leverage. The terminology used in retaining wall construction is shown on figure 5: Figure 5: Terminology of Retaining Wall Constructing a retaining wall, several types of materials can be used. Stone and concrete are the most common materials used in constructing a retaining wall. Besides, there are also special retaining wall blocks crafted from aggregate materials and light concrete which are designed for this purpose. Because each block fits securely with the next, some styles interconnect, making building simpler, less costly and time required. These blocks do not require the addition of mortar due to the fit of these blocks is secure. A retaining wall can be tiers or a series of steps, which allow more efficient erosion control as well as a more sophisticated design. Different types of plantings, flowers or materials in each tier can be included in the design to bring more color, texture and interest to the area. By breaking down the amount of soil and pressure, a tiered design also give a better erosion control held by each division of the retaining wall instead of adding the aesthetic value. Today, there are several styles and types of retaining wall blocks, and most people choose preformed blocks. Unlike today, large stones and railroad ties were often used to construct a tiered retaining wall in the past. Performed blocks are affordable and user- friendly, making other methods out of date at all, except the look of rough stone or wood is preferred. The Concept of Retaining Wall DESIGN PRINCIPLES The design of any retaining wall is basically concerned with the lateral pressures of the retained soil and any subsoil water. The purposes to construct a retaining wall are shown as below: It is difficult to precisely identify the properties of any soil because they are inconsistent materials. The calculation of pressure exerted at any point on the wall is a task for the expert, who must take into account the following factors: Nature and type of soil; Height of water table; Subsoil water movements; Type of wall; Materials used in the construction of the wall. Design calculations related to the resultant thrust of retained material behind a 1m length of wall. There are two well-established methods can be used to determine the resultant thrust: Rankines formula; Coulombs graphical representation or wedge theory. EARTH PRESSURES The designer is mainly concerned with the effect of two forms of earth pressure: ACTIVE EARTH PRESSURE are those that tend to move or overturn the retaining wall, and are composed of the earth wedge being retained together with any hydrostatic pressure caused by the presence of groundwater. The latter can be reduced by the use of subsoil drainage behind the wall, or by inserting drainage openings called weep holes through the thickness of the stem, enabling the water to drain away. PASSIVE EARTH RESISTANCES are reactionary pressures that will react in the form of a resistance to movement of the wall. If the wall tends to move forward, the earth in front of the toe to counteract the forward movement. This pressure can be increased by enlarging the depth of the toe or by forming a rib on the underside of the base. Active earth pressures must equal to passive earth resistances in order to avoid overturning and circular slip. Typical examples of these pressures are shown in figure 6 and figure 7. Figure 6: Active and Passive Earth Pressures act on Mass Retaining Wall Figure 7: Active and Passive Earth Pressures act on Cantilever Retaining Wall STABILITY The overall stability of a retaining wall is governed by the result of the action and reaction of a number of loads: EFFECT OF WATER The design and stability can be affected by ground water behind a retaining wall whether static or percolating through subsoil. The pressure on the back of the wall will be increased. By reducing the soil shear strength, the bearing capacity of the soil can be reduced; it can reduce the frictional resistance between the base and the soil and reduce possible passive pressure in front of the wall. As a result, the issue of drainage of the water behind the retaining wall is the utmost important in the design. SLIP CIRCLE FAILURE Slip circle failure (shown in figure 8) is sometimes encountered with retaining wall in clay soils, particularly where there is a heavy surcharge of retained material. It takes the form of a rotational movement of the soil and wall along a circular arc. The arc commences behind the wall and passes under the base, resulting in a tilting and forward movement of the wall. Further movement can be prevented by driving sheet piles into ground in front of the toe, to a depth that will cut the slip circles arc. Moment due to weight of retained earth and wall above slip circle arc about O is greater than restoring moment RM. RM=permissible shear stress x length of arc ABC x arc radius OC Result: mass above ABC rotates about O. Wall tilts forward and earth heaves in front. Figure 8: Retaining wall failure due to rotational movement. The Importance of a Retaining Wall A retaining wall might be built on property for various reasons. Some level of dirt and soil will be held away from home, garden, pool or play area by building a retaining wall. The sheer aesthetics might also be added on it. A more usable land will be provided if there have a lot of rolling and slopping yard. The importance of retaining wall is stated as below: Retaining Walls Hold Back the Earth Buildings might be built on a hill or in a valley between several hills. Retaining wall will hold back the earth once the hillside has been dug out to construct buildings. Dirt does back in from the sides of the wall with each shovel full. The more you shovel, the dirt begins to fall back in. the sides are loose and weak, so they will crumble at the slightest provocation. The dirt which remains has to discharge when the side of a hill is dug out. If left alone, it will eventually comes tumbling down. The dirt will be held back and the safety will be ensured. Retaining Walls Provide More Usable Land A walk-out basement, patio, playground, garden, tennis court or swimming pool might be installed into proposed development. If the land is rolling or hilly, work cannot be begun until the ground is leveled off. A sort of cliff, where a part of the proposed land which is not dug out is higher than the lower flat land, will then be left out. Adding a retaining wall will have more usable land as well as will add structure and beauty to your new area. Retaining wall can be used as steps into the pool where pool equipments to be held. Retaining Walls Avoid the Ground from Washing Away If the area gets a lot of rainfall or near water such as lake, a retaining wall will keep the water from eroding the soil of your landscaping and around your foundation. This could be a safety measure to prevent landslides and river of dirt from floating towards the buildings. Types of Wall Mass retaining walls Mass retaining walls also known as gravity walls. They rely upon their own mass together with the friction on the underside of the base to overcome the tendency to slide or overturn. They are generally economic only up to a height of 1.800m. Mass walls can be constructed of semi-engineering quality bricks bedded in a 1:3 cement mortar or of mass concrete. Mass concrete could have some light fabric reinforcement to control surface cracking. Natural stone is suitable for small walls up to 1.000m high, but generally it is used as a facing material for walls up to 1.000m high, but generally it is used as a facing material for wall over 1.000m. Typical examples of mass retaining walls are shown in figure 9 and 10: Figure 9: Brick Mass Retaining Walls Figure 10: Mass Concrete Retaining Wall with Stone Facings Cantilever walls Cantilever walls are usually of reinforced concrete, and work on the principles of leverage. Two basic forms can be considered: a base with a large heel so that the mass of the wall with a large toe (figure 10). The figure shows typical sections and patterns of reinforcement encountered with these basic forms of cantilever retaining wall. The main steel occurs on the tension face of the wall, and nominal steel (0.15% of the cross-sectional area of the wall) is very often included in the opposite face to control the shrinkage cracking that occurs in in-situ concrete work. Reinforcement requirements, bending, fabricating and placing are dealt with in detail in the section on the reinforced concrete. Reinforced cantilever walls have an economic height range of 1.200-6.000m. Walls in excess of this height have been economically constructed using prestressing techniques. Any durable facing material may be applied to the surface to improve the appearance of the wall, but it must be remembered that such finishes are decorative and add nothing to the structural strength of the wall. Figure 10: Reinforced Concrete Cantilever Retaining Walls Counterfort Retaining Walls These walls can be constructed of reinforced or prestressed concrete, and are considered suitable if the height is over 4.500m. The counterforts are triangular beams placed at suitable centres behind the stem and above the base to enable the stem and base to act as slabs spanning horizontally over or under the counterforts. Figure 11 and figure 12 show a typical section and pattern of reinforcement for a counterofrt retaining wall. If the counterforts are placed on the face of the stem they are termed buttresses, and the whole arrangement is called a buttress-retaining wall. The design and construction principles are similar in the two formats. Figure 11: Reinforced Concrete Counterfort Retaining Wall Figure 12: Reinforced Concrete Counterfort Retaining Wall Reinforced masonry retaining walls Steel reinforcement may be used in brick retaining walls to resist tensile forces and to prevent the effects of shear. A brick bonding arrangement known as Quetta bond is used to create a uniform distribution of vertical voids. Vertical steel reinforcement is tied to the foundation reinforcement and spaced to coincide with purpose-made voids. The voids are filled with concrete to produce a series of reinforced concrete mini-columns within the wall when the brickwork is completed. Where appearance is not important, or the wall is to receive a surface treatment, reinforcement and in-situ concrete within hollow concrete block work provide for economical and functional construction. Figure 13 shows the application of standard-profile, hollow, dense concrete blocks lay in stretcher bond as permanent formwork to continuous vertical columns. Figure 13: Reinforced Concrete Block Retaining Wall The height potential and slenderness ratio (effective height to width) for reinforced masonry walls can be enhanced by post-tensioning the structure. For purposes of brick walls there are a number of construction options, including: Quetta bond with steel bars concrete in the voids; Stretcher-bonded wide cavity with reinforced steel bars coated for corrosion protection; Solid wall of perforated bricks with continuous voids containing grouted steel reinforcement bars. Some examples are shown in figure 14: Figure 14: Post-tensioned Brick Retaining Walls Conclusion Based on discussion shown on above, I would like to select Cantilever retaining wall as the most suitable retaining wall for the project where is located at hilly area which consists of 20 units of luxury bungalows. As shown as above, a cantilever retaining wall is a form of masonry installation that holds a large amount of earth in place. The cantilever design is just one of several variations on a retaining wall design, using various principles to manage earth loads. Cantilever retaining wall has an economic height range of 1.200-6.000m. This type of retaining wall is suitable for bungalows because the height is sufficient to support the bungalows. A concrete cantilever retaining wall uses a relatively thin stem of steel-reinforced, cast-in-place, concrete or mortared masonry. In a cantilever retaining wall design, an earth pressure vector acts horizontally against the side of the wall. The bottom part of the wall presents a gravity vector downward. That gravity vector produces an opposite force upward. The resulting vector counters the earth pressure vector, and pushes back against the earth load. This type of retaining wall is more stable compared to the other three types which stated on above in order to build 20 units of luxury bungalows because the loads are distributed equally. Retaining wall design is evaluated to moderate the effects of a landslide. Retaining walls can be helpful in protecting soil against the kinds of movement associated with these natural disasters. Looking at landslide risk and the risk of liquefaction, the water saturation of earth, is part of assessing how a retaining wall works. Cantilever retaining wall is one that consists of a uniform thickness wall which is tied to a footing. It located at the basement of bungalows. Thus, cantilever retaining wall will hold back the earth. Soil erosion, landslides and environment disasters are less likely to be occurred. In other words, cracking and collapse of 20 units of luxury bungalows are avoided. Weep holes are designed in the cantilever retaining wall to release the additional pressure created by a accumulated water and helps in stabilizing the retaining wall. This ensures the building will not collapse due to the fast flow of water on the hill. In conclusion, a suitable retaining wall is able to stabilize the soil and avoid overturning and sliding of building. Beside, a suitable retaining wall can also help in saving the construction cost. Therefore, cantilever retaining wall is the most suitable retaining wall for 20 units of luxury bungalows which are located on the hilly area.

No to same-sex marriage Essay

â€Å"Everything is permissible, but not everything is helpful. Everything is permissible, but not everything builds up.† I Corinthians 10:23 Against Same Sex Marriage – The Six Point Case Each of these six points against same sex marriage will be explained in detail in the following articles. Click on each link for more explanation. Natural marriage is the foundation of a civilized society. Homosexual behavior is inherently destructive. The law is a great teacher, and it encourages or discourages behavior. Government-backed same-sex marriage would encourage and normalize homosexual behavior, and it would harm natural marriage, children, adults, and homosexuals themselves. The law should promote behaviors that are beneficial and prohibit (or at least not endorse) those that are destructive. Therefore, the law should promote natural marriage, and it should provide no option for government-backed same-sex marriage or civil unions. Against Same Sex Marriage – The Executive Summary Same-sex marriage is a very emotional issue for many people. However, when one separates emotions from facts, it is clear that the state has compelling reasons to endorse natural marriage and not same-sex marriage or civil unions. Natural marriage is the immune system of civilization. When our marriages are strong, our civilization is strong; when they are weak, individuals and communities suffer. Legal endorsement of same-sex marriage would destroy the institution of marriage, resulting in negative effects on children, crime rates, health and health-care costs, tax rates, and religious freedom. Same-sex marriage activists want to redefine marriage as simply a personal relationship between two committed parties, but marriage is much larger than the two parties involved in a marriage. Marriage is a social institution of long-established rules (based on the natural design of the human body) that provides society with the very foundation of civilization—the procreating family unit. That is, marriage is fundamentally about children and the civilization of society both now and for the future. Only natural marriage can procreate and consistently provide a nurturing and stable environment for the growth and maturation of children. In this sense, the most basic and effective â€Å"form of government† is the natural two-parent family. Statistically, children and adults inside of natural marriage are much better off socially, physically, financially, mentally, and emotionally than those outside of natural marriage. Those outside of natural marriage are not only worse off personally by those measures, but they cost society billions of dollars in social welfare and law-enforcement expenses. The law is a great teacher—it encourages or discourages behavior. Since the law is a great teacher, government-backed same-sex marriage or civil unions would put society’s stamp of approval on same-sex relationships and behavior. This endorsement would fundamentally change the institution of marriage to our detriment. It would do the following: Equate same-sex marriage with natural marriage, thereby teaching citizens the socially disastrous ideas that natural marriage is no better than any other relationship and that marriage is not a prerequisite for children. Disconnect marriage from childbearing by making marriage just about coupling. This will result in soaring cohabitation and illegitimacy and painful costs to children and society. Encourage more homosexual behavior, which is medically destructive to those who engage in it and financially burdensome to the public in general. Result in higher medical, health insurance, and tax costs to the general public. Provide legal grounds to  restrict or prohibit religious freedom and free speech. Much of this is already happening in countries that have government-backed same-sex marriage. Natural marriage is weakest and illegitimacy strongest where same-sex marriage is legal. Most homosexuals are not interested in marriage—approximately 96 percent of homosexuals in countries with same-sex marriage do not get married. They want government-backed same-sex marriage because it would validate and normalize homosexuality throughout society. (Homosexuals can already marry privately and many of them do—what they want is government endorsement.) Some homosexual activists admit that they would like to destroy natural marriage by legalizing same-sex marriage. Since they refuse to live by society’s standards, they will only feel validated if they beat down those standards to the level of their own behavior. If they succeed, everyone in our country will be harmed in some way. This House Bill may seem to be very good in its outward appearance but it will simply gave way to the Promotion and Acceptance of Homosexual Lifestyle in the Philippines. If this bill will be approve in Congress who knows what’s next. Let’s Fight Against this Bill to protect the Divine and Natural Institution that God himself Pre-ordained ever since the beginning of time. Let’s make sure that the Philippines will be secure from any danger of accepting a Culture that will go against the Balance of Nature and propagate a lifestyle that will be harmful both today and the Generation to come. A Culture that will be a potential Treat to the â€Å"Divine Institution of Marriage and the Family†. Let’s be vigilant and make sure this Bill will not be approved by participating in this Signature Campaign.

A Interview On The Interview - 2335 Words

Eighty-six and a half years old, Caucasian man, â€Å"J.M.† graciously agreed to take part in this aging and systems interview. The interview was conducted in J.M.’s studio room of his home where his life’s work hangs on the walls and books, articles, awards, and family pictures surround him. This studio is also where J.M. spends a lot of time researching different topics of interest on the internet, working on art at his table and sending funny e-mails to his family. He lives in a cozy, eco-friendly, single story home with his companion, my grandmother, and their two rescue dogs. As the interview starts J.M. is smiling, laughing, and making sure his oxygen is on; (he has no lung reserve). J.M. was diagnosed with pulmonary hypertension, emphysema, cardiomyopathy with aortic pulmonic tricuspid, and also suffers with arthritis. He was given six months to live two years ago. J.M. is on a three times a day schedule of multiple medicines and relies on his daily two hour nap to recharge. His breathing greatly limits his activities. He once swam, biked, and walked all in the same day; now just the acts of getting up to plug in his razer and to sit down takes a significant toll on his strength. J.M. complains of his arms and legs not working as they once did and pulling muscles in his back more often, which at times can be debilitating. J.M. mentions residual damage from a fall years ago from scaffolding eighteen feet high in which he fell and landed on his back on concrete. He jokesShow MoreRelatedInterview : Interview And Interview915 Words   |  4 PagesInterview : Mak Recently, I had taken the time to interview Mak. Her full name is Eunice Mak and is a young lady of 26 years living in San Francisco, California with her grandparents, parents, and brother. She graduated from San Francisco State University with a Bachelor of Science in Human Development. She currently works at Kaiser as a Pharmacy Technician. 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