Methods of definition volumetric output coefficient of workpieces from pine saw-timbers

10.12737/7089 ◽  
2014 ◽  
Vol 2 (5) ◽  
pp. 171-174
Author(s):  
Nikita Krivoshchyokov
Keyword(s):  
Output Coefficient

scholarly journals Analysis of Educational Quality Based on Quality, ServQual and Retention of Students

2020 ◽  
Vol 3 (2) ◽  
pp. p11
Author(s):  
Tegowati Tegowati ◽  
Dian Palupi ◽  
Yesa Cahayaning Ramadhani
Keyword(s):  
Service Quality ◽  
Student Retention ◽  
Student Satisfaction ◽  
Structural Equation ◽  
Positive Influence ◽  
Mediating Effect ◽  
Equation Modeling ◽  
Output Coefficient ◽  
Relationship Of ◽  
Parameter Coefficient

This study analyzed the influence of ServQual (service quality) on satisfaction and student retention. The sample used was 175 STIESIA Surabaya students using non probability sampling called, accidental sampling. Data analysis used Structural Equation Modeling (SEM) with AMOS 21 software. Based on the discussion of the hypotheses proposed in this study, the conclusions are as follows: 1). There is a positive influence between ServQual on satisfaction. This is based on the results of the parameter coefficient output. It is known that the relationship of the ServQual construct to satisfaction is significant at 0.001 (sign p = ***) with a standardized parameter coefficient of 0.735. Thus, if ServQual is good, students will be satisfied, and vice versa if ServQual is bad, students will not be satisfied. 2) There is a positive effect of satisfaction on student retention. This is based on the results of the output coefficient parameter construct relationship satisfaction to student retention significant at 0.001 (p = 0.001) and standardized parameter coefficient of 0.513. Thus if student satisfaction is high then student retention is also high, and vice versa if satisfaction is low then student retention is also low. 3) There is no influence between ServQual on student retention indicated by the output parameter coefficient at 0.001 (p = 0.132) This proves that loyalty cannot be created through service quality, but through satisfaction first. thus, it can be said that satisfaction has a mediating effect between ServQual and Student Retention.

scholarly journals Study on the influence of the cotton storage process on the quality indicators of fiber and yarn

2021 ◽  
Vol 939 (1) ◽  
pp. 012053
Author(s):  
Q Jumaniyazov ◽  
M Ismatova ◽  
I Abbazov ◽  
D Kazakova
Keyword(s):  
Quality Indicators ◽  
Lower Layer ◽  
Average Length ◽  
Fiber Quality ◽  
Viscosity Index ◽  
Light Output ◽  
Fiber Properties ◽  
Yarn Properties ◽  
Output Coefficient

Abstract This article defines fiber quality indicators that differ in laboratory conditions from the upper, middle and lower layers of Bukhara-6 breeding varieties of cotton, in the modern system HVI 1000 SA. Based on the results of the study, histograms of changes in the quality of cotton fiber in the layers of the harem are presented. As an alternative, the quality indicators of yarn obtained in the laboratory spinning device “Sherli” of small size from fiber were determined. As can be seen from the analysis of the test results, it was found that the comparative elongation strength of cotton obtained from the lower layer of the stack, the upper average length, elongation at break, the light output coefficient, decreased compared to other layers of the stack, on the contrary, the index of hip fibers, increased, decreased compared to other layers of the stack. In addition, according to the results of the tests obtained, the fiber viscosity index was obtained – the correlation between the properties of fibers and the properties of yarn, the thread viscosity index was estimated by the CSP (COUNT STRENGTH PRODUKT) coefficient, which was determined by the formula for carded yarn obtained in the laboratory spinning device “Sherli” from fiber stored in the refrigerator. The obtained results showed that the relationship between fiber properties and yarn properties due to the fact that the maturity index of a thread is at the top of the stack compared to the middle and lower part of the stack.

Computational Fluid Dynamics to Assess the Blade Effect of a New Savonius Rotor for Improvement of the Output Power Coefficient

2019 ◽  
Author(s):  
Takanori Matsui ◽  
Tomohiro Fukui ◽  
Koji Morinishi
Keyword(s):  
Output Power ◽  
Flow Direction ◽  
Power Coefficient ◽  
Moment Arm ◽  
Practical Applications ◽  
Savonius Rotor ◽  
Output Coefficient ◽  
The Moment ◽  
Boltzmann Method ◽  
Virtual Flux

Abstract The output power coefficient of the Savonius rotor should be improved for better practical applications. So far, new Savonius rotor has been developed to improve the minimum output coefficient by adding semi-elliptical blade. Thus, the purpose of this research is to investigate the influence of the additional semi-elliptical blade’s position on the output coefficient. Flow around the rotor was simulated by using the regularized lattice Boltzmann method. The virtual flux method was used to express the shape of the rotor on a Cartesian grid, and the multi-block method was used for local fine grids of the rotor. The rotation speed of the Savonius rotor was maintained constant, and its performance was evaluated by the output power and torque coefficients. As a result, the semi-elliptical blade successfully generated additional positive torque in the range of the advancing phase and improved the minimum output power coefficient of the rotor during a cycle. When the moment arm is short, the semi-elliptical blade did not generate large negative torque in the range of the returning phase owing to its position behind the main blade in the wind flow direction. The output power coefficient of the new Savonius rotor was improved compared to that of the traditional one depending on the length of the semi-elliptical blade’s moment arm.

Study on Performance and Internal Flow of Cross-Flow Wind Turbine

2003 ◽  
Author(s):  
Kazuki Takeuchi ◽  
Junichiro Fukutomi ◽  
Hidetoshi Kodani ◽  
Hironori Horiguchi
Keyword(s):  
Wind Turbine ◽  
Pressure Difference ◽  
Main Part ◽  
Cross Flow ◽  
Internal Flow ◽  
Power Coefficient ◽  
Construction Costs ◽  
Outer Flow ◽  
Output Coefficient ◽  
The Cross

The wind turbine has become more popular in recent years, but on the other hand, the developments of small wind-turbine have been legging behind. Because, the energy density of wind is small, since the efficiency of the main part of a wind turbine is very low. The construction costs become comparatively high-priced. Then, the main part of this subject is to show that, by collecting and sucking out more winds, a wind turbine is made to pass many winds and the new cross-flow wind turbine that increases an output coefficient is proposed. The cross-flow wind turbine has high torque and low speed characteristics and the structure are very simple. So, it can be used in a large wind velocity region. However, even if the power coefficient is high, it is about 10%. The purpose of this paper is to show how we can improve the power coefficient by applying a casing, which has a nozzle and a diffuser. This research was made to clear up fundamental characteristics of the interaction between outer flow and inner flow. Three kinds of cross-flow wind turbines were designed. The nozzle and diffuser have been designed suitable for the performance of wind turbine. The flow simulations by CFD have been carried out for various types of casings at 20 m/s with Fluent Ver5.0. All Wind tunnel experiments were performed at 20m/s. The case of casing 2, which have plate arranged near the separation point of cylinder, also experimented. The rotor that is settled in the casing 1 shows a larger power coefficient than the case without a casing. The casing of the cross-flow turbine makes a pressure difference between inflow and outflow. The pressure difference increases the mass flow rate. Therefore much more wind passes through into the cross-flow turbine. In this experiment, the power coefficient increased 1.5 times in the case with casing. A still higher output coefficient could be obtained in the case where it is shown by the casing 2.

Output Coefficient of Synchronous Motors

1985 ◽  
Vol PER-5 (7) ◽  
pp. 52-53
Author(s):  
M. Yamamoto ◽  
Y. Takeda ◽  
T. Oishi
Keyword(s):  
Synchronous Motors ◽  
Output Coefficient

Output Coefficient of Synchronous Motors

1985 ◽  
Vol PAS-104 (7) ◽  
pp. 1849-1855 ◽  
Author(s):  
M. Yamamoto ◽  
Y. Takeda ◽  
T. Oishi
Keyword(s):  
Synchronous Motors ◽  
Output Coefficient

scholarly journals Trade-offs Between Severance Tax Revenues and Coal Mining Employment

1985 ◽  
Vol 14 (2) ◽  
pp. 203-210 ◽  
Author(s):  
Jill L. Findeis ◽  
James S. Shortle
Keyword(s):  
Economic Development ◽  
Coal Mining ◽  
Mining Industry ◽  
Coal Industry ◽  
Coefficient Estimates ◽  
Industry Growth ◽  
Price Elasticities ◽  
Tax Revenues ◽  
Trade Offs ◽  
Output Coefficient

A severance tax can provide local jurisdictions with additional revenues to finance economic development, yet the imposition of a tax may create coal industry employment losses. This research analyzes this issue by examining the demand for Pennsylvania steam coal, providing estimates of the unconditional own price elasticities of demand for coal in each of two demand regions. These estimates in conjunction with labor/output coefficient estimates are used to determine the extent to which coal employment in a region already witnessing slow mining industry growth will be negatively affected.

The Aerodynamic Efficiency of Windmills

1978 ◽  
Vol 29 (1) ◽  
pp. 1-17 ◽  
Author(s):  
G M Lilley
Keyword(s):  
Power Output ◽  
Design Procedure ◽  
Horizontal Axis ◽  
Aerodynamic Design ◽  
Or Efficiency ◽  
Aerodynamic Efficiency ◽  
Vortex Theory ◽  
Output Coefficient

SummaryThe paper reproduces the results of an earlier report on the vortex theory of windmills and follows that theory through to establish the aerodynamic design procedure for a horizontal axis windmill. The results are shown to differ considerably from those given in a recent paper by Griffith and the differences are explained. The main conclusion is that, when full allowance is made for the drag of the blades, hub and tip losses, and losses due to interference with the support tower, the power output coefficient or efficiency of a horizontal axis windmill cannot exceed 30 to 35 per cent, as compared to an ideal efficiency of 59 per cent.

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