The Design and Development of an Automatic Guiding System for a Tractor

Mechanization and Automation are very fashionable words in present day Agriculture. Both imply a reduction in the amount of human effort necessary to achieve certain ends, and to accept the need for either of them is to assume that it will lead to some financial gain. Automation as applied to Agriculture is to improve many limited factors which affect the final yield of any agricultural crop. One of these factors, the mechanical operation, requires considerable care and attention to more nearly insure maximum yield and high quality. Numerous methods have been adopted through research and development to minimize field losses of a crop and to improve the quality of product with the use of more adaptable and accurate machines. As such, the objective of this study was: 1. To design, develop, and construct an automatic steering device which would enable a tractor to guide itself down the crop row accurately. The system was to be designed in a manner that would make it possible for the tractor to be used for a variety of crops with little or no change in the automatic steering components. 2. To design a system which could be justified economically where labor is scarce and expensive or unskilled, or where the tractors are operated in hazardous conditions

Perfectionism and competitive anxiety in athletes

AbstractThe aim of this study was to examine the relationship between perfectionism and competitive anxiety in a sample of athletes. One hundred and seventy three volunteer athletes (115 males, 58 females) were included in this study. All participants were asked to complete the Competitive Perfectionism Scale (CPS) and the Multidimensional Competitive Anxiety Questionnaire (MCAQ). The results revealed that striving for perfection (positive perfectionism) was negatively associated with cognitive and somatic anxiety, and positively associated with self-confidence. The results also revealed that negative reaction to imperfection (negative perfectionism) was positively associated with cognitive and somatic anxiety, and negatively associated with self-confidence

Studying effect of intellectual capital on insurance demand increase: case study; Asia insurance company

Difference in the companies' performance is resulted by the fact that successful organizations have strategic resources (physical, human, and structural) that their Competitors doesn't have. So, difference in these resources have prominent role to create benefit for companies. The main purpose of the present study is to study intellectual capital effect on insurance demand increase in Asia insurance company and tries to study the effect of three dimensions of intellectual capital (human, structural and customer) on insurance demand increase in Asia insurance company. Research method in terms of the goal is applicable, and in terms of the study method is descriptive and is of survey branch. Population of the study consists of all officers of central organizations of Asia insurance company in Tehran. The sample size is 132 officers of the central office of Asia Insurance Company. Data collected by questionnaire and analyzed by One Sample T-Test. The results indicate that intellectual capital and it's dimensions, have effect on insurance demand increase in Asia insurance company

Evaluation of Iranian Medical Universities' Websites Based On Content and Technical Features Effecting On Promotion of Webometric Rank

aim: Websites of medical universities in addition to its role as an information tool in the health scope, they have also importance in the promotion of universities’ ranking in webometrics ranking of world universities and also in the webometric ranking of Iranian universities and research institutions. So, continuous evaluation of these websites in different aspects, especially based on considering index of these ranSpearman correlations. Findings: The finding of this study showed that in total, from maximum score related to evaluating criteria i.e. 102 scores, Tehran University of medical sciences (by obtaining 73.66 scores), Isfahan University of medical sciences (by obtaining 67.65 scores) and Kashan University of medical sciences (by obtaining 66.56 scores) have the most accommodation with the research checklist. Bam university of medical sciences, Dezfool university of medical sciences and Jiroft university of medical sciences (38.87, 38.85 and 37.02 respectively) have the least accommodation. Conclusion: The present study indicates that the whole website is far from an ideal situation. So, Iranian medical universities need to take advantage of the results of this study to improve the structure and content of their websites. These universities besides pay more attention to produce of rich and update information content also they must notice to technical criteria of search engines optimization in designing of their websites and by removing the technical access problems, try to eliminate the barriers of visibility

Seepage Through Different Concrete Cut Off Wall Connection Systems Case Study: Karkheh Storage Dam

Seepage and water flow is one of the most important factors in design of embankment dams. The seepage through the foundation of earth dams can be controlled using the concrete cut off walls. The hydraulic head reduces in connection zone of the cut off wall and core of the dam that results to high hydraulic gradients. As a result, erosion and water leakage may occur. In this regard, the design of concrete cut off wall connection to the clayey core of earth dam is important. In this research, the total flow and the hydraulic gradient are considered to study the seepage through different cut off wall connection systems. The Karkheh storage dam with a plastic concrete cut off wall is selected for the seepage analysis. Six different connection systems are modeled and the effect of physical and mechanical factors like, the cut off wall permeability and the geometry of the connection systems on the total flow and the maximum hydraulic gradient are investigated. The connection systems with minimum flow and hydraulic gradient are determined. According to the results, the cut off wall connection system is an important part that affects the flow in earth dams. In this regard, the connection system with the most effective characteristics and suitability in construction is determined

Stress-Strain Analysis of Different Concrete Cut Off Wall Connection Systems Case Study: Karkheh Storage Dam

The concrete cut off wall is usually used to control the seepage through the foundation of earth dams. It is usually made of plastic concrete. It can be connected to the core of the earth dam using different connection systems. The difference between cut off wall and core material results stress concentration in the connection zone. In fact the main cause is the large difference between stiffness of the cut off wall concrete and clayey core of the dam. This makes the stress-strain behavior complex in the connection zone. In the present study, six different details for the connection system of the cut off wall to the earth dam core were identified. The Karkheh storage dam in Iran with a plastic concrete cut off wall was selected as the case study for investigation of the behavior of different connection systems. The connection systems were modeled and the stress-strain behavior in connection zones was analyzed at the end of dam construction and steady state seepage through the dam. Eventually, the most appropriate connection with the best stress-strain distribution was determined. According to the results the stress strain behavior of different types of cut off connection systems are different. Indeed, the kind of connection between the cut off wall and the core influences the stress-strain distribution in the connection zone drastically. According to the results, the system No. 2 (thick concrete slab at the base level of the core) causes a better stress-strain distribution compared to the other methods of cut off wall connection with the core

Inhibitive Factors on the Development of Critical Thinking in University Libraries: Students' Attitudes in Bushehr University of Medical Sciences and Persian Gulf University

Introduction: Critical thinking training is one of the most important missions of educational institutes. Hence, academic libraries as an inseparable operational unit of higher education must help their users to benefit from information resources and facilities providing them with the chance to develop and improve critical thinking capability. This study aimed to investigate significant barriers to and inhibitive factors on providing a suitable environment for developing and improving critical thinking in university libraries from the viewpoints of students in Bushehr University of Medical Sciences and Persian Gulf University. Methods: In this descriptive survey, the barriers to critical thinking development in academic libraries was investigated according to the viewpoint of 793 students from Bushehr University of Medical Sciences and Persian Gulf University in 2013-14 academic years. Students were selected by stratified proportional sampling. Data was collected through a valid and reliable researcher-made questionnaire categorized using 5-point Likert scale. The questionnaire was validated using experts’ viewpoints and its reliability was approved through estimation of Chronbach’s Alpha (0.84). Data were analyzed using descriptive statistics, one-sample t-test, Mann Whitney Test, and Kruskal-Wallis. Results: Mean scores in areas of linguistic barriers (weighted mean: 3.59), users’ inherent barriers (weighted mean: 3.49), users’ social and psychological barriers (weighted mean: 3.38), and logical barriers (weighted mean: 3.34) were higher than cut-off point of 3 and placed in the significant level of (p=0.0001). These barriers were identified as the most important ones from the viewpoints of students. Conclusion: By encouraging students to ask and seek and creating a suitable environment for sharing ideas, university libraries and librarians can help their users in improving their linguistic communication. Holding educational workshops to promote information literacy skills, the ability to seek, analyze, evaluate and judge the value and validity of information, as well as conducting educational tours on how to use library facilities could eliminate major factors in developing critical thinking that is lack of ability in determining informational needs and different levels of identification and utilization of retrieved information

A Regulation of Construction for General Principles of Good Governance as a Review for Impeachment of Indonesian President

Construction Principles regulation of Good Governance as a review of impeachment for President in his position, therefore used two methods namely:  Amendment method of  Indonesian constitution of 1945 that is known as the regulatory term; and law  construction method  by the judge of the Constitutional Court (MK-RI) that is known as the system of jurisprudence. Constructed through amendment methods of theIndonesian Republic Constitution of 1945 is the President or Vice President may be impeachment in their position of office by the Assembly on the proposal of the House of Representatives, both if it is proven to have violated the law in the form of treason, corruption, bribery, other high criminals, or misdemeanours, or proved to have violated Principles of Good Governance, and proved no longer qualifies as President or vice President. While the results of the legal construction by the judges of the Constitutional Court (MK-RI) will be included in the legal consideration of judges is not in the dictum of the decision set forth in the jurisprudence. The results of the two methods gave birth to the theory of formal recognition (of the formal recognition), so that it becomes positifis instrumentalist as a review of impeachment for contemporary . Keywords: Construction, Principles of Good Governance, Review, Impeachment, President

Elderly Fall Detection by Sensitive Features Based on Image Processing and Machine Learning

The world’s elderly population is growing every year. It is easy to say that the fall is one of the major dangers that threaten them. This paper offers a Trained Model for fall detection to help the older people live comfortably and alone at home. The purpose of this paper is to investigate appropriate methods for diagnosing falls by analyzing the motion and shape characteristics of the human body. Several machine learning technologies have been proposed for automatic fall detection. The proposed research reported in this paper detects a moving object by using a background subtraction algorithm with a single camera. The next step is to extract the features that are very important and generally describe the human shape and show the difference between the human falls from the daily activities. These features are based on motion, changes in human shape, and oval diameters around the human and temporal head position. The features extracted from the human mask are eventually fed in to various machine learning classifiers for fall detection. Experimental results showed the efficiency and reliability of the proposed method with a fall detection rate of 81% that have been tested with UR Fall Detection dataset