Investigation of wall's optimum insulation position from maximum time lag and minimum decrement factor point of view

2000 ◽  
Vol 32 (2) ◽  
pp. 197-203 ◽  
Author(s):  
H Asan
Keyword(s):  
Time Lag ◽  
Point Of View ◽  
Maximum Time

scholarly journals The importance of the promotion of university sport on the faculty level – case analysis

2020 ◽  
Vol 66 (1) ◽  
pp. 77-96
Author(s):  
Tvrtko Galić ◽  
Mijo Ćurić ◽  
Antun Biloš
Keyword(s):  
Time Lag ◽  
Developed Countries ◽  
Academic Community ◽  
Point Of View ◽  
Important Place ◽  
Sport Activities ◽  
University Level ◽  
The Republic ◽  
The University ◽  
The Way

The ways of informing students about the activities which are organized on a faculty or university level daily present an increasing challenge. The very aim of this work is to analyze and compare ways of informing students of the Faculty of Education about the sport activities on the faculty and university level. The way of informing students about the activities will be compared with the ways of informing about general sport activities in order to identify possible deviation from two different types of activities. Promotion being one of the marketing elements, so is the appliance of adequate promotion tools very important in all social processes. Numerous examples, especially in sport, proved that the activities of the sport participants will not be successful without the adequate use of promotion. University sport in developed countries surely occupies an important place in the academic community; from that point of view it is very important to determine the way of managing the university sport. The university sport in the Republic of Croatia is becoming more significant element of students' activities every day, and the promotion contributes to that. Apart from comparing the ways of informing about sport and regular activities, this paper will provide the time comparison of the mentioned researches between 2014 and 2020. The comparison of the same data with the time lag will provide the best picture of the changes in the ways of informing in a 6-year-period. The obtained results have shown that even after six years, students continue to prefer certain communication channels, i.e. they remain primary.

FAILURE TIME DISTRIBUTION UNDER A δ-SHOCK MODEL AND ITS APPLICATION TO ECONOMIC DESIGN OF SYSTEMS

1999 ◽  
Vol 06 (03) ◽  
pp. 237-247 ◽  
Author(s):  
ZEHUI LI ◽  
LING-YAU CHAN ◽  
ZHIXIN YUAN
Keyword(s):  
Poisson Distribution ◽  
Time Distribution ◽  
Failure Time ◽  
Time Lag ◽  
Economic Design ◽  
Point Of View ◽  
Shock Model ◽  
Failure Model ◽  
Failure Time Distribution ◽  
As If

Suppose that shocks arrive and act on a system according to a Poisson distribution with mean rate of arrival equal to λ shock(s) per unit time. A δ-shock failure model is proposed in this paper, which assumes that when a system is acted on by a shock, it will recover fully in time δ(>0), and after that it will function as if no shock had occurred before. If the time lag between two successive shocks is less than δ, the second shock will cause failure of the system. Theoretical expressions related to the distribution of the failure time of the system are derived. These results can be used to optimize the design of a system from a costing point of view.

scholarly journals How Multimodal Examinations Can Increase Sustainable Student Gain by Aligning Teaching and Assessment

2021 ◽  
Vol 7 (2) ◽  
pp. 73-76
Author(s):  
Michael Gundlach ◽  
Martin Baumann ◽  
Ulrich M. Engelmann
Keyword(s):  
Engineering Students ◽  
Time Lag ◽  
Point Of View ◽  
University Education ◽  
Controlled Study ◽  
Practical Training ◽  
Theoretical Knowledge ◽  
University Graduates ◽  
Practical Skills ◽  
Science And Engineering

Abstract Modern industry and multi-discipline projects require highly trained individuals with resilient science and engineering back-grounds. Graduates must be able to agilely apply excellent theoretical knowledge in their subject matter as well as essential practical “hands-on” knowledge of diverse working processes to solve complex problems. To meet these demands, university education follows the concept of Constructive Alignment and thus increasingly adopts the teaching of necessary practical skills to the actual industry requirements and assessment routines. However, a systematic approach to coherently align these three central teaching demands is strangely absent from current university curricula. We demonstrate the feasibility of implementing practical assessments in a regular theory-based examination, thus defining the term “blended assessment”. We assessed a course for natural science and engineering students pursuing a career in biomedical engineering, and evaluated the benefit of blended assessment exams for students and lecturers. Our controlled study assessed the physiological background of electrocardiograms (ECGs), the practical measurement of ECG curves, and their interpretation of basic pathologic alterations. To study on long time effects, students have been assessed on the topic twice with a time lag of 6 months. Our findings suggest a significant improvement in student gain with respect to practical skills and theoretical knowledge. The results of the reassessments support these outcomes. From the lecturers´ point of view, blended assessment complements practical training courses while keeping organizational effort manageable. We consider blended assessment a viable tool for providing an improved student gain, industry-ready education format that should be evaluated and established further to prepare university graduates optimally for their future careers.

scholarly journals DETERMINANTS OF CREDIT GROWTH IN BANKING SECTOR OF BOSNIA AND HERZEGOVINA // DETERMINANTE KREDITNOG RASTA U BANKARSKOM SEKTORU BOSNE I HERCEGOVINE

2017 ◽  
Vol 12 (2) ◽  
Author(s):  
Dragan Jović ◽  
Miodrag Jandrić
Keyword(s):  
Economic Policy ◽  
Central Bank ◽  
Bosnia And Herzegovina ◽  
Deposit Insurance ◽  
Banking Sector ◽  
Positive Impact ◽  
Time Lag ◽  
Point Of View ◽  
Credit Growth ◽  
Domestic Banks

Credit growth is function of several variables, which are from the domestic banks point of view internal and external. NPL and deposits, on bank level, nominal GDP growth, and inflation have biggest impact on credit growth. Credit growth is under direct and strong influence of global crises and of ECB monetary policy, and these variables influence is with time lag. Between factors which also influence credit growth, but which influence is not so statistically significant, like previous factors, distinguish themselves capitalization ratio and return on asset on banking sector level. Possibility of doing banking business without deposit insurance, putting limits on deposit rates and on deposit growth could contribute to decrease in banks deposit variability, and to smoothness in credit growth path, as well as insisting on capital ratio rising. If domestic economic policy want to manage credit growth in domestic banking sector it is necessary to increase quality of prudential regulation, to improve NPL management and credit risk management and to modify monetary regime, by granting permission to domestic central bank to provide credits to residents. Without providing credit to residents by Central bank of Bosnia and Herzegovina, it is not possible to achieve price stability and it is not possible to decrease deflationary pressure. Increase in capital ratio has positive impact on credit growth, and vice versa, and that is way increase in capitalization must object of permanent supervision. Since activity and profitability of systematically important banks are one of credit growth generator, banking supervision has to have particular strategy for big banks resolution. Low influence of previous credit growth on current credit growth is motive for active countercyclical economic policy.

scholarly journals Management of teachers’ education in the area of Administration facing the competitive and technological challenges of the XXI century

2018 ◽  
Vol 10 (2) ◽  
pp. 5-8
Author(s):  
Yessica Muñoz-Reyes ◽  
Wendy Almendrales
Keyword(s):  
Latin American ◽  
Time Lag ◽  
Point Of View ◽  
Educational Institutions ◽  
Cross Sectional ◽  
Financial Difficulties ◽  
Institutional Structures ◽  
Innovation And Technology ◽  
Higher Educational ◽  
Latin American Countries

Corruption, financial disequilibrium, unemployment, inflation, among other factors, have been the cause of the general crisis in today’s society, they have produced a time lag for the economic, educational and social development of Latin American countries. Colombia is not the exception to this set of problems, on the contrary, it is a country that today has been hit by economic and financial difficulties, corruptive acts at a national governmental level, drug trafficking, and a series of conflicts that have brought instability to the productive system of the country, therefore affecting growth in as much as competitiveness, innovation and technology. Facing these problems from the national government point of view, it is necessary to shape some educative policies at a higher educational level. The Higher Educational Institutions, including technical and technological must make reforms to their institutional structures, adapting them to market demands. That is why, inside general parameters, the education of teachers must be included as a main cross sectional axis for student’s learning.

scholarly journals Physical and Chemical Aspects of the Nucleation of Cement-Based Materials

10.14311/1668 ◽  
2012 ◽  
Vol 52 (6) ◽  
Author(s):  
Pavel Demo ◽  
Alexey Sveshnikov ◽  
Šárka Hošková ◽  
David Ladman ◽  
Petra Tichá
Keyword(s):  
Cement Paste ◽  
Energy Barrier ◽  
Critical Size ◽  
Time Lag ◽  
Point Of View ◽  
Cement Ratio ◽  
Initial Stage ◽  
Water To Cement Ratio ◽  
Cement Based Materials ◽  
Physical And Chemical

A theoretical model of the nucleation of portlandite is proposed, and the critical size of a portlandite cluster and the energy barrier of nucleation are determined. The steady state nucleation rate and the time lag of the nucleation of portlandite are estimated for a pure solution of Ca(OH)2 in water. Possible connections with the corresponding properties for cement paste are discussed. A new method is developed for experimentally determining the concentration of Ca2+ ions during the initial stage of hydration of a cement paste. The time dependence of Ca2+ ions is measured for various water-to-cement ratio values. The results are discussed from the point of view of existing models of the induction period.

scholarly journals Challenges for the Measurement of Innovation Ecosystems and Entrepreneurial Ecosystems in Brazil

2020 ◽  
Author(s):  
Renata Lèbre La Rovere ◽  
Guilherme de Oliveira Santos ◽  
Bianca Louzada Xavier Vasconcellos
Keyword(s):  
Small Businesses ◽  
Time Lag ◽  
Point Of View ◽  
Data Sources ◽  
Theoretical Point ◽  
Entrepreneurial Ecosystems ◽  
Innovation Ecosystems ◽  
Multiple Data ◽  
Brazilian Case

Purpose: This paper aims to identify metrics and indicators of innovation ecosystems and entrepreneurial ecosystems and to discuss the limitations of these metrics in the Brazilian case. Theoretical framework: From a theoretical point of view, the paper contributes to the analysis of the differences and similarities between the concepts of innovation ecosystems and entrepreneurial ecosystems. From a methodological perspective, the paper proposes indicators and metrics and points out the limitations for measuring entrepreneurial and innovative ecosystems in Brazil. Design/methodology/approach: The study’s qualitative approach is based on a literature review, a documentary research, and data collection for the characterization of innovation ecosystems and entrepreneurial ecosystems. The paper identifies the main indicators and metrics, their data sources and the limitations of these indicators and metrics in the Brazilian case. Findings: It was observed that despite the existence of multiple data sources, the measurement of entrepreneurial ecosystems in Brazil entails constraints such as time lag of the data; voluntary filling of databases; lack of transparency at the regional level; and incomplete or skewed data. Research, Practical & Social implications: From a theoretical point of view, the paper contributes to the analysis of the differences and similarities between the concepts of innovation ecosystems and entrepreneurial ecosystems. From a methodological point of view, the study proposes indicators and metrics and points out the limitations for the measurement of entrepreneurial and innovative ecosystems in Brazil. Originality/value: When identifying limitations, the paper proposes alternatives to improve the measurement of innovation ecosystems and entrepreneurial ecosystems in the country and in its different regions. This is essential for designing and monitoring public policies to support innovation, especially those aimed to support entrepreneurs and small businesses.

scholarly journals Ecology of Icerya purchasi Maskell, 1879 (Homoptera: Margarodidae) on clementine trees at Sidi Moussa (Central Mitidja, Algeria)

2020 ◽  
Vol 10 (5) ◽  
pp. 296-301
Author(s):  
L. Boukhobza ◽  
R. Belguendouz ◽  
M. Biche
Keyword(s):  
Cross Correlation ◽  
Temporal Dynamics ◽  
Statistical Tests ◽  
Integrated Control ◽  
Time Lag ◽  
Pairwise Comparison ◽  
Point Of View ◽  
Correlation Test ◽  
Larval Stages ◽  
The Cross

In order to establish better communication between applied entomology and fundamental ecology to consider an integrated control against the Australian cochineal Icerya purshasi Maskell, 1879 (Homoptera: Margarodidae) the most formidable pest for citrus fruits, a study on the Spatio-temporal dynamics of the parasite were followed for two years in a clementine orchard in Western Mitidja in Algeria. Ten-day samples of leaves and twigs were carried out from 2017 to 2018. The level of I. purchasi infestation is very high throughout the study period when the minimum threshold exceeds 400 individuals, with 3 intense periods of infestations: spring, summer and fall during the two years. The population of young larval stages is the largest during the two years of study with 13,323 individuals (62.79%) and 13,968 individuals (54.39%) in 2017 and 2018 respectively against 7896 individuals (37.21%) in 2017 and 11,715 individuals (33.50%) in 2018 for adults. Tukey's pairwise comparison test on the companion plan shows that the 2018 one is the most important from an overall effective point of view (ANOVA p≤1%, Tukey's test p≤1%). The Cross-Correlation Test shows the presence of a time lag (p=0.0371, p≤5%) and the maximum overall abundance was reported around mid-July for both campaigns. Statistical tests show that females show the same fertility during the two campaigns (ANOVA, p≤5%). peak fertility in 2017 was reported in mid-June, while peak fertility was reported in mid-July for the 2018 campaign. The Cross-Correlation Test shows a very significant time lag from one month to another (p=0.0064, p≤1%).

Transient Torque of Steam Turbines in Power Systems

1970 ◽  
Vol 185 (1) ◽  
pp. 641-653
Author(s):  
G. Sheard ◽  
F. J. Evans
Keyword(s):  
Power Systems ◽  
Power System ◽  
Steam Turbine ◽  
Transient Stability ◽  
Time Lag ◽  
Point Of View ◽  
Transient Condition ◽  
Steam Turbines ◽  
Exponential Time ◽  
Turbine Model

Techniques for the calculation of the transient torque of a steam turbine following step and ramp type displacements of throttle valves are developed. The objective is an improvement in steam turbine representation for digital and other studies of electric power systems under disturbed conditions, including transient stability. The turbine model used as a building block for the transient theory is a length of pipe, representing loop pipe or reheat boiler, followed by a multi-stage turbine. The theory of unsteady flow of compressible fluids is applied to the problem and this, together with throttle, nozzle and steam turbine equations, allows the transient torque to be calculated. A digital computer programme has been developed which could be used as a sub-routine in an overall transient stability programme. The dominant transient feature is a transport lag and not an exponential time delay, as is commonly assumed. Moreover this transport lag, being associated with the local sonic velocity rather than the steam particle velocity, has a value about one-tenth of the usually assumed exponential time lag in mass-flow. Methods are indicated for extending the transient response obtained for the above turbine model to multi-cylinder turbines. The conclusion to be drawn is that, for any fast turbine control or transient condition (on a time-scale of seconds rather than tens of seconds), the conventional assumption of an exponential time constant will be substantially in error. Such fast disturbances will almost certainly have their origins on the power system side. It is from the power system point of view that this paper is written.

scholarly journals Evidencing the relationship between injected volume of water and maximum expected magnitude during the Puerto Gaitán (Colombia) earthquake sequence from 2013 to 2015

2019 ◽  
Vol 220 (1) ◽  
pp. 335-344
Author(s):  
Sebastián Gómez Alba ◽  
Carlos A Vargas ◽  
Arno Zang
Keyword(s):  
Seismic Waves ◽  
Oil And Gas ◽  
Time Lag ◽  
Seismic Energy ◽  
Volume Of Fluid ◽  
Point Of View ◽  
Sequence Of Events ◽  
Close Relationship ◽  
Maximum Expected Magnitude ◽  
Low Efficiency

ABSTRACT Since 2013 to date more than 1000 seismic events have been recorded by the Servicio Geologico Colombiano (Colombian Geological Survey, SGC) in the municipality of Puerto Gaitán (Colombia). A total of 14 earthquakes are moment magnitude Mw > 4.0. The largest event ever recorded in the area occurred in November 2015 with Mw 4.8. It seems like the case of Puerto Gaitán is associated with the deep injection of coproduced wastewater from oil and gas extraction. The data presented in this work suggests a close relationship in space and time between injection operations and seismicity. An analysis of temporality between both data sets resulted in a time lag equivalent to about 218 d. For this paper, we computed the input and output energy during injection operations from 2013 to 2015 in order to estimate the fraction of total input energy that is radiated as seismic waves. Our results suggest that the seismic energy is only a small fraction of the total energy into the system. Although Puerto Gaitan is one of the places with the most significant volume of wastewater injected among the ones reported in the literature, the energy efficiency of the system is the lowest reported to date in comparison with other applied technologies. The low efficiency seems to be associated to the aseismic deformation of the reservoir rocks. The observed clustering of earthquakes is delimited by the basement crystalline depth. From an operational point of view, we determine that, like most cases associated with fluid injection, volume of fluid is the variable that determines change in the seismic moment released. Furthermore, the sequence of events in Puerto Gaitán may not fit into a well-known correlation between the volume of fluid injected and the maximum expected magnitude. The observed magnitudes in Puerto Gaitan are well bellow compared to those reported in the literature for similar volumes of injected fluid.

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