Abstract:This study aims to investigate the directors’ charateristics and its impact on firm’s productivity and firm performance. Directors’ characteristics contains of the level of education (high school, undergraduate, graduate and post-graduate), the type of education (business and non-business), the directors’ tenure. Firm’s productivity is measured using the ratio of sales and the number of employees. Firm performance is measured using the ratio of return on assets (ROA). The population is all listed-firms in the sector of trade and industry with a total of 112 firms and the sample size is 87 firms that is chosen proportionately from each sub-sectors. Due to the missing data and incomplete data, the final sample is 44 firms with a period of 2010 to 2016. A quarterly financial report is used and thus there is 28 financial reports (2010 to 2016), and the total observation is 1232. The ordinary least square (OLS) is used to analyse the data, and prior to analysis, a normality test of data is employed using Kolmogorov-Smirnov test. The specification test such as normality test, autocorrelation test, multicolinearity test is performed. The result reveals that the directors’ charateristics has a significant effect on firm’s productivity and firm performance. This significant result is supported by the type of directors’ education that is more than 80% of directors have a master degree and a bachelor degree qualification and most of the directors have an education major in business. Moreover, most of the directors has more that five years of tenure, however, the term of office of the chief executive needs to be limited, because it will impact on saturation and innovativeness
Abstract:In this study, single independence degree testing system is prepared to find control parameters used in balance control of rolling and pitching axis of drones capable of vertical takeoff and landing. In preparing the test mechanism, the mathematical models of pitching and rolling stability controls in similar literature studies are the same but the mathematical model of yawing stability control is different. Thus, because of the reason that the pitching and rolling stability control parameters are the same, the test mechanism is made as single freedom degree instead of dual freedom degree. In the controller design PID controller often used in the industry today is used and oscillation method found by Ziegler - Nichols was used in findings PID parameters.(Ziegler and Nichols, 1942) ATMEL based Arduino Mega 2560 controller, BNO055 absolute orientation sensor giving Euler angles directly and Brushless DC motor speed are used for control of drone. In this test system balance of rolling or pitching angles of the drone are broken with various angles and Kp, Ki and Kd parameters in control software are found with oscillation method to ensure balance of drone in the shortest possible time. Against these disruptive effects it was observed that system gave quick response for small angle values and exceeding was less and settlement time vas smaller while in bigger angle values system reacted with a little delay and exceeding increased and settlement time grew.
Abstract:Allium white rot caused by the pathogenic fungus Sclerotium cepivorum is a devastating disease of garlic worldwide. In this study we develop and evaluate a molecular assay for the detection of S. cepivorum in mycelia and infected garlic gloves using a specific PCR primer set combined with a rapid boiling DNA extraction. The PCR products were amplified in all the samples infected with S. cepivorum, but not in other samples including phylogenetically closely related fungi. This methodology is inexpensive, fast, specific and has a shorter execution time compared to standard methods.
Abstract:The relevance of the study is stipulated by the necessity to understand large scope of works in the field of residential environment design at the present stage. Since Russian design is characterized by a high degree of canonicity in comparison with that of Europe, by reliance on national traditions and the high level of reflectivity, the need appeared to reveal its national origins in the modern designer\'s practice. Design as a multi-cultural phenomenon is subject to changes in its semantic content, thus current tendencies in the residential interior associated with national traditions are analyzed in the article. Moreover, substantial bases for its development opportunities are revealed. Hence, this article is aimed at disclosing the complex process of how the spiritual values of the Russian nation serve as guidelines in the modern Russian design practice.
Abstract:The aim of the study was to evaluate the effect of a static magnetic field (SMF) on proliferative activity and to determine the presence of porcine endogenous retroviruses (PERV) in porcine stem cells that are derived from adipose tissue with respect to their safety in regenerative medicine. Porcine adipose-derived stem cells (pADSC) were subjected to the influence of SMF. Three chambers with SMF of different intensities (0.4, 0.55 and 0.7 T) were used in the study. CD73, CD90, CD105, PERV-A, PERV-B and PERV-C were quantified using the qRT-PCR technique. An assay of the effect of SMF with a 0.4 T, 0.55 T and 0.7 T flux density on the viability of pADSC showed no statistically significant differences compared to the controls, thus confirming that SMF do not affect the proliferative activity of pADSC in vitro. Significant reductions in PERV-B copies were observed following the exposure of cells to SMF with a magnetic induction of 0.7 T. Moreover, higher flux densities seem to abolish the magnetic field-overexpression of PERV-A in pADSC. The results of our research may contribute to the development of theoretical and practical foundations of new method for culturing mesenchymal stem cell in vitro based on the use of a static magnetic field that is generated by permanent magnets in regenerative medicine.
Abstract:This study aims to examine and analyze the effect of Firm Size, Maturity, Financial Leverage on the Bond Rating as well as the impact on Yield to Maturity. Research data is annual data for three years observation period (2012-2014). This research is descriptive research and statistics. The population in this study are corporate bond that listed on Indonesia Stock Exchange. From 198 population of corporate bond, The sampling method used was purposive sampling, 58 samples of corporate bond has met the criteria to be the sample. The analytical method used in this research is data panel and measuring direct effect and indirect effect analysis. The results showed Firm Size and Financial Leverage has significant influence on the Bond Rating, however Maturity has negative influence but not significant. Firm Size and Maturity has negative significant ilnfulence on the YTM, however Leverage has a positive influence but not significant on the YTM. Firm Size, Maturity, and Leverage simultaneously are having significant influence on the Bond rating as well as YTM. The examination of indirect effect showed rating as variabel intervening could be considered to measure the influence of Firm Size to YTM
Abstract:Background: Pediatric hypertension predisposes to hypertension and cardiovascular disease in adult life. Management guidelines of childhood hypertension were accessible for almost 40 years.US Preventive Services Task Force provided support for hypertension screening in childhood. To our knowledge, there isn\'t any available data about blood pressure status of South Sinai children. \nWe aimed to determine the prevalence of hypertension among South Sinai children and study ethnic, gender and environmental role\nSubjects and methods: 3322 children were randomly selected. Subjects were males (1721) and females (1601) with ages range 4-17 years. According to ethnic origin, cases were descended from Bedouin origin (1664) and urban origin (1658) living at 6 study districts.Blood pressure was measured by pediatrician using an auscultatory technique. Blood pressure levels were interpreted using 2017 reference values which classified blood pressure levels into normal, elevated blood pressure, grade 1 hypertension and grade 2 hypertension. \nResults: The overall percentages of systolic and diastolic hypertension were 8.37% and 10.66% respectively. There was significant difference between study sites (p= 0.0000). Redeis and Sidre areas had the highest rates of hypertension. Data showed difference only between genders for grade 2 diastolic hypertension with female predominance. Ethnic origin seems to have no role in hypertension % for South Sinai children.\nConclusion: hypertension among South Sinai children is within levels published by many countries. Hypertension in South Sinai is mainly due to environmental and nutritional factors which need deeper studies.
Abstract:The paper describes control method for two-quadrant three-phase rectifier DC drive system. The DC motor is the main part of equipment in many industrial applications requiring variable speed and load characteristics due to its easy controllability. There are two different types of control loops, current controller and speed controller.\n A control scheme is developed that providing the functions of armature current controller also increased and decreased speed of motor. This paper deal with the speed control of separately excited DC motor control in the better performance way.
Abstract:Broomrape (Orobanche cumana Wallr.) which is a holoparasitic plant infecting and reducing sunflower yield until 100% infecting the sunflower roots. This parasitic plant is considered as one of the most significant restraint for sunflower produce in areas of Turkey, the Middle East, Russia, Ukraine and China. There are eight known races of Orobanche. cumana parasitizing sunflower: A through H and new races spread out easily and quickly year-by-year. The purpose of this study was to assess the race composition of Orobanche cumana by microsatellite markers in order to determine the genetic variation of Orobanche cumana Wallr. population. This study revealed the degree of polymorphism of 24 polymorphic SSR markers. Also it showed that the Orobanche cumana population in Turkey is devised into 4 groups according to their geographic origin and 6 clusters according to their genetic diversity. This Orobanche cumana population collected from 8 locations in the Thrace region of Turkey and one location in Mediterranean region (Adana) contains 6 different races. It involves 2 race A, 2 race D, 2 race E, 1 race H, 1 race I and 1 race F.
Abstract:This study addresses the influence of a unique combination of oxides (SiO2, Cr2O3, FeO, MoO3 and Al2O3) as a flux for improving the welding strength of 316L stainless steel. Geometric shape, surface appearance, weld pool temperature, oxygen percentage in the weld zone and microstructures are investigated. The recorded temperature of the weld pool of Activated Flux Tungsten Inert Gas (A-TIG) welding is found to be almost 500⁰C higher than conventional TIG (C-TIG) welding. The results established that the unique combination of flux powder improves the penetration depth and aspect ratios of the welded joints. The mechanical properties like hardness and tensile strength are found to be improved on using the oxide mixture. These outcomes can increase the productivity of metal fabrication process.