Occupational mobility in engineering profession (craftman and artisan) in Oyo State, Nigeria.

This paper evaluate occupational mobility in engineering professional in Oyo State of Nigeria with the goal assessing causes and readiness of the professionals to return to the profession when the hindering factors are removed as well as sufficiency of the survey instrument in addressing the research problems. The study was conducted using a well structured questionnaire administered in 20 local government of Oyo State, Nigeria representing the sample space of 0.424. The Cronbach’s alpha of the reliability test of 0.453 was returned for the scale mean statistics of 11516.83 and variance of 0.0000007 showing that the survey instrument was sufficient and could be relied upon. The result of the socio economic analysis showed that 80% of the respondents were married while (15%) were single and the rest (5%) were divorced. The age distribution of the respondents ranged between greater than 50 years groups (12%) and 30 -39 years group (39%).The result of the analysis of job characteristics of the respondents showed that the longer the year of graduation, the lesser the number of graduates still in the business. The cross table analysis of the socio-economic indices with the job status of the respondents showed that marital status and level of education does not have significant effects on the job status of the respondents (whether still practicing or not) because 1.454 and 5.223 returned for both marital status and level of education are not significant (P<0.05). Also, the contingency table analysis of the effects of the skill acquisition methods showed that more of the respondents who acquired their skill via Technical School (70%) are willing to go back to the professions. However, for those who acquired their skill through Learning/artisanship, less than average (32%) of the respondents are ready to return to the profession. Lastly, the establishment of the regression model for the relationship between the proportion of the people wishing to go back to the profession and year of practicing the profession provide a necessary impetus for addressing the Job mobility problem faced by the profession

О возмещении вреда, причиненного окружающей среде

В статье анализируется действующее законодательство Республики Беларусь и России с целью определения понятий «вред, причиненный окружающей среде», «экологический вред» и «ущерб», предпринимается попытка сравнить методики их определения

Space shuttle orbiter environmental control and life support systems

Environmental control and life support system for space shuttle orbite

Комбинированное клиент-сервисное тестирование по теоретическим разделам органической химии

В статье обсуждены результаты применения в учебном процессе новой компьютерной образовательной технологии в режиме клиент-серверного тестирования. В качестве рабочего инструмента применена компьютерная программа MyTest X, для наполнения которой создана обширная база тестовых заданий по теоретическим основам органической химии. Осуществлено внедрение в учебный процесс созданного наполнения и программы в тренировочном режиме и для тестового контроля знаний

Rauvolfia vormitoria Effect on the Degradation of Aluminium Alloy in 2.5 M Hydrochloric Acid Solution

The deterioration of aluminium alloy in 2.5 M hydrochloric acid in the presence Rauvolfia vormitoria extract was examined using both gasometric and gravimetric techniques. Aluminium coupons measuring 4 cm by 1 cm were introduced into test solutions of uninhibited acid and also those containing extract quantities of 10, 20, 30 and 40 cm3 at ambient temperature of 250C for a total cumulative period of 117 minutes. The volumes of hydrogen gas evolved and weight loss readings were recorded and analyzed to obtain weight loss and corrosion rate for each coupon at specific time intervals. The results however, showed that while extract quantity was increasing; weight loss measurements increased but inhibitor efficiency decreased. Also, the metal surface-phytoconstituent interaction mechanism was consistent with the Temkin adsorption isotherm and the 3 minutes curve showed the best exposure time for phytochemicals to adsorb to alloy surface. Furthermore, microstructural studies showed an indirect relationship between metallic degradation and extract quantity, while uniformity of the irregular intermetallic phases increased with increasing extract quantity

Proof of a conjectured q,t-Schr\"{o}der identity

A conjecture of Chunwei Song on a limiting case of the q,t-Schr\"{o}der theorem is proved combinatorially. The proof matches pairs of tableaux to Catalan words in a manner that preserves differences in the maj statistic.Comment: 8 pages; v2 corrects presentation error in example and notation (substance of proof unchanged

Analysis of Russian UGS capacity in Europe

Gas is the fuel of choice in Europe for heating, and many expect that gas consumption will continue to increase in the future. On the contrary, European indigenous production decreases, yielding needs to import natural gas primarily from Russia. Travelling long distances from production sites, gas deliveries come by pipelines. Most of them, having operated for decades, have almost depleted their design lifetime, and before long will tend (or have already implemented) to reduce nominal flow pressure and thus flow capacities. To compensate sufficiently for gas peak demands avoiding long, costly and sometimes not practical procedures of changing out pipes, it is suggested to examine the effect of gas storage at European strategic locations to ensure the balance between gas demand and supply. Along with storing gas in a liquid form as LNG, stipulated by need in spacious plants and infrastructure, Underground Gas Storages (UGS) near to the customers are studied and are seen as the most practical way of natural gas preservation in a gaseous form. Conditions provided, pressurized gas is held in underground facilities at key locations, so that it can rapidly be transported to desired regions. Depending on a number of factors, and to suit the different gas supply needs, various types of UGSs are distinguished as follows: • Gas storage in depleted fields. • Gas storages in a water-bearing structures. • Gas storages in salt dome formations. The paper outlooks UGSs across Western and Eastern Europe with focus on the available capacity of the biggest gas supplier to EU- Gazprom Group Company and its storage capacities. An investigation is done to demonstrate the recent change in storage volumes rented and owned, and change in the geography of storages involved. Applying technical and economic criteria, the study shows a need of Russian gas to urope and a need of European UGS facilities for Russian gas

Исследование размалывающей способности и бумагообразующих свойств хлопковой целлюлозы

Проведены лабораторные исследования по определению размалывающей способности в дисковых мельницах и бумагообразующих свойств волокон хлопковой целлюлозы. Определены параметры гидросуспензий хлопковой целлюлозы, полученных при различных параметрах размола, а также фракционный состав по волокну. Это дало возможность установить параметры размола, позволяющие осуществлять одновременно с укорочением и интенсивное фибриллирование волокон хлопковой целлюлозы. Определена зависимость свойств бумаги, получаемой из хлопковой целлюлозы, от параметров ее гидросуспензий