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State Space Model of an Aircraft Using Simulink
Get PDFIn aircraft designing it is crucial to understand and evaluate the behavior, performance, safety and other aspects of the systems before its operational testing. To develop a robust control system of an aircraft it is therefore necessary to have a good mathematical model of the system so that the behavior can be easily understood, predicted and controlled. In this paper the state space model of an autopilot aircraft is formulated using Simulink Matlab Function files. The proposed simulation model can be used to gain knowledge in order to make decisions at all development stages. In this paper the model has some assumptions such as the aircraft is taken in steady cruise at constant altitude and velocity, balancing the thrust, drag, weight and lift forces in X and Y direction, secondly change in pitch angle will not change the speed of the aircraft under any circumstances and lastly he input will be the elevation differential θd and the output will be the pitch angle θp of the aircraft. We have worked only on stability axis and emphasized on the fast settling of the system without significant overshoots. The state space model using Simulink is successfully formulated and simulated with and without controller. The angle of aircraft, pitch rate and pitch angle are selected as state variables.In addition to this the stability analysis from the state space model is also performed and improved using PD controller
Optimal Truck Dispatching For Construction Waste Conveyance
Get PDFAbstract—Waste from the construction industry has to be conveyed to and disposed at specific waste-treatment plants. Decision makers, who work in environmental protection companies, usually schedule and dispatch the trucks used for conveying construction waste to plants manually, which is neither efficient nor effective. In practice, there are space and capacity limitations in every construction site and waste-treatment plant, meaning that the amount of the construction waste for transporting and disposing at a specific time and position is restricted. Moreover, when the number of trucks is insufficient, the responsible environmental protection companies could also hire vehicles from car rental companies. Given these considerations, coupled with the related operational constraints and objective of construction waste conveyance in practice, in this study we employ a time-space network flow technique to develop an optimal scheduling model that can assist decision makers in dispatching both their own and rented trucks for conveying construction waste efficiently. The model is formulated as an integer network flow problem with side constraints. Finally, a case study using the real data from an environmental protection company in Taiwan is performed and the results indicate that the model could be useful for dispatching trucks efficiently and thus decreasing the conveyance cost
A Survey of Lending Relationship Between SMEs and Banks
Get PDFThe aim of this study is to examine the lending relationships between banks and SMEs. Numerous authors have investigated the importance of banking relationships in lending to small businesses. A major issue is the relative difficulty in obtaining meaningful information and accurately assessing the credit worthiness of such borrowers. For this reason, many authors have examined the influence of this relationship on various aspects of line of credits made in different countries but up to date no studies has been conducted in lending relationship of SMEs with banks in Turkey. This may be because of the data insufficiency of SMEs. This research aims to fill that gap by looking at the determinants of SME lending conditions by using the survey results of SMEs.The factors that affect the dependent variables (the interest rate and the credit line volume) is tested by using the ordinary least squares (OLS) regression analysis. The data is obtained by the questionnaires conducted by 204 SMEs. The results for credit interest rate reveals that age, financial distress, duration of relationship, recent ownership change and location significantly affect the interest rate given by the most actively worked bank. The empirical results suggest that close and long-lasting relationship is desirable for firms. Firms with long-lasting bank relationships fare better than other enterprises in terms of interest rates, and credit availability
Determinants of Investment at the Individual Level - Evidence from SACCOS in Mbeya District, Tanzania
Get PDFInvestment is the corner stone for economic growth and development. Poor countries experience a scant growth of their economy simply because of minute investment at the individual to national level. In these less developed economiesinvestment has been hampered by insufficient capital to support a viable business enterprise. External financing is required to reverse this trend. Experience shows that the provision of credit is the preeminent way to increase capital for investment. There have been several credit providers in developing countries namely, the formal, semiformal, and informal sources. While the formal and semiformal sources dominate in urban areas, the informal ones seem to dominate in rural areas. Many of the formal sources require credit to be secured by tangible assets. Unlike other credit lines like banks, credit from saving and credit cooperative (SACCOS) are issued without delay because credit worthiness can be established easily. These SACCOS normally operate within the premises of members and are well positioned to serve poor people both in urban and rural areas.This study was conducted to assess the determinants of investment at the individual level. Multistage and simple random sampling techniques were used to select the study area and respondents. The sample includes 239 SACCOS members and 241 non members. Data analysis employed both descriptive statistics and Ordinary least square regression methods. The study examines achievement differences in terms of the investment level achieved by SACCOS and non SACCOS members in order to determine the attributed factors to their success. The study provides sufficient evidence to support the proposition that acquisition of credit is important for investment at an individual level at P<0.001
Interest Free Salary-Workers Savings and Credit Co-Operative Society as A Panacea to Economic Hardship Faced By Workers in A Depressed Economy
Get PDFThe conventional cooperative societies dated back to 1844 were built on interest-based operations, where interest is charged and paid on any financial advance to members and deposits made by members, respectively. Interest based transactions are not only forbidden by the two major religions in Nigeria, but are perceived to be negating the principle of mutual help and economic stability; which cooperatives are out to achieve. This paper examines the operations of interest free cooperative societies formed by salary-workers; with the aim of exploring the concept, objectives, activities, management and sources of funds to such societies. This study uses content analysis. From the review, this study found out that salary workers stand to enjoy a lot of benefits by forming Interest free co-operative societies. It is therefore concluded that Interest free savings and credit co-operative society is the most appropriate form of co-operative society through which workers used to improve on their savings
Risk Assessment for Cloud Computing
Get PDFThe broad implementation of cloud computing has brought a dramatic change to multiple industries, which derives from the development of the Internet-related technologies. Cloud service providers have untangled a lot of issues to maintain a robust quality of service. Despite the utilization of proficient techniques in resource management that has made optimal planning possible, as one resource is allocated to multiple users the risk of resources unavailability in cloud computing is still present. The level of risk is evaluated based on the probability of an incident occurring, which is mapped against the estimated negative impact. The probability of an incident occurring can be determined by the threat exploiting the vulnerability. All though a zero-risk scenario is impractical, effective risk assessment strategies equipped with efficient mitigation mechanisms can decrease the negative impact. As of now there are three types of cloud computing systems public, private and hybrid each with different levels of security. Most In this paper, we examine the various risk assessment models with regards to a Cloud Computing and touching upon Information Assets and Risk, Privacy and Confidentiality Concerns, Data Governance
Management and Modeling of Processing Of Agricultural Products in Kazakhstan
Get PDFAbstract — The article is devoted to important aspects of the development of agro-industrial complex of Kazakhstan. The contribution of agriculture to GDP is still relatively low, averaging less than 5% in recent years. However, a positive trend is planned at the expense of state support for the development of this sector. The country has received insufficient development of the processing sector of food production. It is noted that this is due to a greater extent due to low domestic prices and advantageous terms of trade in foreign markets. The work carried out econometric modeling assessment of factors that have a significant importance for the development of agricultural product processing areas on the example of the light industry. Based on regression analysis revealed that the increase in the yield of major crops and the flow of investment will lead to increased production in agriculture. Revealed problems and provides recommendations to improve the organization of the processing industry of the agricultural sector.
Index Terms — Kazakhstan, processing of agricultural products, food security, light industry, cotton, investment, econometric modelin
Nano-Scale Movement Induced In Graphene Ripples by Multi-Probe Microscopy
Get PDFAbstract— An Omicron low temperature multi-probe technique is used for manipulation of mechanically exfoliated suspended and attached graphene sheets on SiO2 substrates. Scanning electron microscopy (SEM) and Raman spectroscopy are used to detect the graphene sheets and determine their thicknesses and quality, respectively. The interaction of the etched tungsten tip with the graphene is used to lift and release the sheet and induce artificial ripples. Both suspended and attached sheets onto the substrates show different behaviour in response to bias voltage.
IndexTerms: graphene,multi-probe microscopy, ripples.
 
Footwear Design Crowdsourcing Platform Model For Strengthening Of the Competitiveness Of The Footwear Industry
Get PDFThe volumes of global footwear production and consumption have been steadily increasing. In particular, the income increases of China and Southeast Asian countries have led to the rapid growth of footwear production and consumption in Asia. However, while advanced countries still include footwear business as one of their growth engines, Korea regard it as stagnant or diminishing. However, beyond the category of simple manufacturing, footwear industry involves the integration of highly functional products, parts manufacturing, and marketing business, and includes expertise in the fields of design, materials, and epidemiology. The strengthening of the shoe industry is an important potential driver of the overall economy. The strengthened competiveness of the footwear industry will play an important role in the overall economic growth. Crowdsourcing is an approach that encourages the participation of specific communities or unspecified masses in a company’s production, service, or problem-solving processes to increase efficiency. To this end, this paper suggests the crowdsourcing platform model built through the integration of footwear design and IT for the ultimate enhancement of the competitiveness of the Korean footwear industry. Following this paper, a study about the practical development, application, and active use of such platform needs to be conducted. One limitation of this study is that the platform is yet to be developed or applied. Future research should focus on developing an actual platform and further studies in its application and vitalization
The Use of Software as a Service to Facilitate Quality Learning Experience for Students in Higher Education Institutions
Get PDFAbstract—Higher Education institutions (HEIs) contribute to knowledge creation and the development of individuals which leads to national development and economic growth. Although governments continuously provide funding for HEIs, the ever increasing population of students and changing cost of purchasing and maintaining needed resources makes the funding from governments insufficient for HEIs to provide students with all the necessary resources. One of the resources needed to train students and provide them with quality learning is software and applications which are expensive to buy and maintain. As a result, most HEIs are unable to provide their students with needed software and application and this makes learning process difficult for students. This research suggests that Software as a Service (SaaS) can provide a solution to this problem because HEIs can subscribe at little or no cost to service providers and students can access the needed software or application at any time from any place using any internet enabled device. This will also help HEIs to save a lot on cost as they only pay for the software when it is used thereby ensuring that the use of software and applications is maximized. This research looks into the current use of SaaS in HEIs to identify ways in which SaaS could be used effectively so as to contribute towards the creation of a conducive learning environment which can enhance quality learning.
Index Terms: Software as a Service, SaaS, students, higher education, quality learnin