Showing posts with label engineering. Show all posts
Showing posts with label engineering. Show all posts

Industrial Organizational is an interdisciplinary field that draws not only from all of psychology, but also from business, engineering, health science, education, design and other behavioral sciences. What are the three most relevant fields (outside of psychology) to the field of organizational behavior?

1.    Industrial Organizational is an interdisciplinary field that draws not only from all of psychology, but also from business, engineering, health science, education, design and other behavioral sciences.  What are the three most relevant fields (outside of psychology) to the field of organizational behavior?
    Psychology as a discipline helps in understanding the mental and behavioral functions of persons from a scientific perspective. As such, understanding these traits helps in evaluating the needs and developing a conceptual model for the organization. On the other hand, industrial organization is a discipline that incorporates, a range of disciplines. From my opinion and based on the research I carried out, I believe that the disciplines involved include, and not limited to the following. Economics and in particular the area of finance has a model that fits well in the industrial organization. It is evident that any organization must have a financial department in order to perform efficiently and effectively. In the late 1960s and early 1970s, a conceptual model for the financial model was developed known as the capital asset pricing model (CAPM). The model circulated more widely through the field of economics profession. The model had an insight that utilized a psychology aspect. For example, it is argued that in the context where investors would hold a diversified portfolio of assets rationally, the measure of the riskiness of the asset was a covariance of its returns. Here the broad market returns would be used rather than just the own variance of the returns of the asset.
    Business and in particular the area of marketing is another area where the principles of psychology come into play. Marketing is more than just convincing the buyer on why they should buy a certain product and forego another. Outlining and offering the benefits of the products is not the only effective baseline of winning new clients. The need to maintain a constant influx of returning customers is essential in promoting the brand in the sale and the market of the product. Therefore, the principles of psychology where playing with the mind of the consumer prove to be important. A good example in this case is evaluating multinational brands such as Coca-Cola. It is engraved in the minds of the consumers that the brand is superior as compared to its competitors. The psychological influence that comes with a superior brand is a major reason this brand has been performing extremely well in the market as compared to its competitors. The effect of psychology in the industry cannot be overlooked.
    Organizational behavior is also affected to a great extent by design principles and ergonomics. The production of goods and service have to meet certain standards. It is this standards that in most cases influence the decision of the buyers. The benefits that they will deduce from buying the product are paramount to the process of decision making. Design as a behavioral science applies the principles of physiology in incorporating the needs of the consumer to the output of the final product. The above is achieved through an evaluation of the needs of the client and incorporating these needs to the expected performance of the designed product. A good example of this incorporation is the design of products such as clothes, shoes and office furniture.
2.    Human factors are one of the fastest growing areas of psychology and are one of the few areas where a master’s degree is considered the standard for getting a senior level appointment in industry.  You are asked to describe the field and its relationship to more traditional areas of psychology (e.g. social, developmental, cognitive, clinical, physiological, etc.) to psychology majors who do not want to go on to a doctorate and are considering other career options.
    As one of the fastest growing areas of psychology, human factors are a discipline that any psychology major should consider advancing. Compared to other areas of psychology, traditional forms in the field have not been scrapped from the field. Areas of social, development, clinical, cognitive and physiological among others have been incorporated in the model of human factors. Areas of design and in particular comfort design, user-friendly systems and functional design are also aspects in the human factors consideration. As an area in psychology, the practice of designing systems and products must be effective and provide an interaction between the people that use them and the ergonomics of designs. As a multidisciplinary discipline, human factors borrow largely from the field of psychology and as such; the field marks a proper foundation for the development and advancement in one’s career.
    The understanding of the interaction between humans and systems and proper effectiveness is studied in this field. The discipline has a variety of application since it is evident that systems are being developed in all fields. The student can engage in the development process and curve their way in either studying the internal or external factors that influence the development of the systems.  Human factors and ergonomics involves an evaluation of the fit between the environment, the user, and the system. As such the discipline does not compress the area of study of the student making it a good fit, study area and undertaking.  The ability of the field to offer interaction of the users, systems, and the environment can be explicitly compared with the traditional aspect of social and developmental studies in psychology.
    A reliable academic pursuit is determined by the opportunities it offers the students after a successful completion of the course. Human factors are an effective undertaking as they offer a variety of applicable areas making it an effective undertaking. As compared to traditional disciplines in the field of psychology, it is evident that the study incorporates these studies making it an effective area of study.
Ejectors

Ejectors

Ejectors
The ejector system is made up of an array of wells.  The wells may either be closed or sparsely spaced. However, the commonality in the wells is that the jet pump, called an ejector is used for pumping. Initially, the ejector dewatering technique was developed in North America in the 1950s and 1960s. During this period, the jet pumps used in domestic supply wells were first applied to groundwater lowering problems. Ever since, the technique has been a common occurrence in implementation in Europe, the former USSR and the Far East. However, in the United Kingdom, ejectors were rarely applied prior to the late 1980s. The implementation was adopted during the A55 Conwy Crossing Project. This project made use of ejectors on a large scale throughout the U.K (Powrie and Roberts 1990)
An ejector is suitable for pore water pressure reduction projects in low-permeability soils such as very silty sand, silt, or clay with permeable fabric. The main reason for using the ejectors in this soils is due to the fact that they aid in drainage. Their characteristics such as the ability to reduce the flow rate and the creation of a vacuum makes them ideal for these usage.
Advantages of ejector systems
The ejector system works by circulating high-pressure water. The water is usually from a tank and a supply pump placed at ground level. The flow follows a down riser pipe and through a small diameter nozzle and venturi located in the ejector in each well. The water passes through the nozzle at high velocity, thereby creating a zone of low pressure. A vacuum of approximately 9.5m from the level of the ejector is created. The vacuum draws groundwater into the well through the well screen, where it joins the water passing through the nozzle, piped back to ground level via a return riser pipe, and then back to the supply pump for recirculation. Two header mains are needed. A supply main feeds high-pressure water to each ejector well, and a return main collects the water coming out of the ejectors. This consists of the water supply and the groundwater as it is drawn into the well. For the recirculation processes to continue this pipework is needed.
Another advantage of an ejector system is that ejectors have the ability to pump both air and water. Therefore, if the ejectors are installed in low-permeability soil, a vacuum will be developed in the well. This is one of the main reasons that ejectors are suitable for use in low-permeability soils, where the vacuum is needed to enhance drainage of soils into the wells. Another advantage is that the method is not constrained by the same suction lift limit as a wellpoint system. Drawdowns of 20–30 m below the pump level can be achieved with commonly available equipment, and drawdowns in excess of 50 m have been achieved with systems capable of operating at higher supply pressures. These characteristics mean that ejector systems are mainly applicable in the following ways:
1. As a vacuum-assisted pore water pressure control method in low- permeability soils.
2. As a form of “deep wellpoint” in soils of moderate permeability as an alternative to a two-stage wellpoint system or a low-flow-rate deep well system.

It is worth noting some of the practical limitations and drawbacks of the ejector system. One of the major drawback is the low mechanical efficiency of ejector systems. This means that the energy levels are low. In low- to moderate-permeability soils, where flow rates are small, this may not be a major issue, but in higher-permeability soils, the power consumption and energy costs may be huge in comparison to other methods. As a result, the ejector system is rarely used in soils of high permeability. Another concern is that an ejector systems are prone to gradual loss of performance due to nozzle wear or clogging. This is due to the high water velocities through the nozzle. Regular monitoring and maintenance can be used to mitigate this problem. However, adopting this approach may lead to long-term operations being less straightforward.
Topic: Structural Analysis, Design and Detailing

Topic: Structural Analysis, Design and Detailing

For your coursework, all the loads/actions applied on the structures that you are going to analyse and design depend on your uniqueness code (UC). Your Uniqueness Code (UC) is made up from the SUM of the third and sixth numbers of your student ID number and calculated as follows below.(Please make sure that you hand in this information with your coursework report):
Third number of your ID NO. = 3
Sixth number of your ID NO. = 3
Your Uniqueness Code (UC) = 6

4.2.2. Brief for Coursework Structural analysis, design and detailing
A client wishes to utilise an open area to construct a three storey building with the height of each storey of 3.6m. An architect has been appointed and has evolved the scheme which is sketched in Figure 1.

It has been assumed that the building floor between columns 1 and 5 adopts steel- concrete composite floor, which is supported by composite beam and steel column. However, the building floor between columns 5 and 6 uses in-situ casting concrete floor, which is supported by concrete beam and concrete column.
The characteristic variable action on both floors qk =1.0UC (kN/m2) (Note, use your UC value to calculate the variable action for your structural analysis + design).
All the steel beams and columns are in S275 and UKB section. The materials and further design information of the reinforced concrete slab, beam and column follow below:
 Concrete grade 35 (fck=35 N/mm2)
 Maximum aggregate size =20 mm
 Main steel reinforcement - high yield steel (fyk=500 N/mm2)
 Transverse links - high yield steel (fwyk=500 N/mm2)
 Diameter of main longitudinal steel () = 25mm
 Design tensile strength (fctm) = 3.5 N/mm2
 Assume 15% moment redistribution (i.e.  = 0.85).
 Architectural requirements limit the maximum overall beam depth to 800mm
 Maximum interior span/effective depth ratio should not be greater than 18.

As a structural engineer, you have been asked to carry out the structural analysis, design and detailing of this multi-storey building with the main tasks listed below:
Q1. Introduction to the problem and to structural grid. Explain the measures you have to take to improve the stability of the structure.
Q2. Estimate the sizes of all slabs, beams and columns, and carry out load calculations for one typical slab and beam. 
Q3. Carry out manual structural analysis to determine the effects of actions on one typical slab, beam and column.
Q4. Use the LUSAS to carry out structural analysis to determine the effects of actions on one
Q5. Design steel-concrete composite slab.
Q6. Design steel-concrete composite beam.
Q7. Design steel beam and column connection
Q8. Design continuous concrete beam.
Q9. Design concrete column.

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