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With the increased use of herbicides, there is a need for proper management practices and protective measures in the use of herbicides by the farmers in the flood plains of Dundaye district. A study was carried out on the flood plains of Dundaye along Rivers Sokoto and Rima. Ninety (90) respondents were selected randomly for the study with the aim to obtain information on the demographic characteristics, types of herbicides used, common weeds and crops cultivated, basic rules of herbicide application and impact of herbicides on environment and health. Data collected were analysed using descriptive statistics. The results showed that farmers were able to identify variety of grasses and broadleaved weeds common in the area. Common herbicides used by the farmers were Atrazine, Primextra and Dual. Majority (68.88%) of the farmers sourced their herbicide from the market. Though farmers had experience in farming and herbicide application, yet there is the need for proper guidance on the application and management of pesticides. The major problem raised by the farmers was the cost involved in the purchase of herbicides. From this study, it was concluded that farmers utilised herbicide but more education and enlightenment on management of herbicides and the use of preventive measures is required in the area.

The study assessed the Global Risk Factors (GRFs) affecting performance of Nigerian construction firms, with a view to identifying the most severe and appropriate risk response techniques. In order to achieve this aim, the severity of GRF across different categories of firms, and the risk response techniques most suitable for each GRF were examined. A total of 105 questionnaires were administered out of which a total of 49 were fully completed and returned. Descriptive statistics was used to analyse the data collected using Likert scales, while Analysis of variance was used to evaluate the similarities/differences in the views of different categories of construction firms. The findings show that most construction firms consider payment delays (mean = 2.65), poor project scope (mean = 2.40) and inadequate design information (mean = 2.39) as the most severe GRF affecting the performance of Nigeria construction firms. It was also discovered that, despite the high likelihood and impact of GRF such as; payment delays, design changes, and inflation/bank Interest rates amongst others, most firms still opted to “accept” them. On the other hand, poor project scopes, strikes, failure to meet clients need and all factors related to unethical practices were “avoided”, while all legal related risk factors were “mitigated”. It is hoped that these findings will help construction firms in developing countries such as Nigeria to be more aware of the effect of GRF in order to be able to assess them effectively before embarking on construction projects.Keywords: Global Risk Factors, Probabiity-Impact Metrix, Negative Risk, Risk Management, Semi-Quantitative Technique

An experiment was conducted to evaluate the effect of feeding varying inclusion levels of inoculants-treated soybean residues (ITSR) on nutrient intake and digestibility of Uda sheep. A twelve weeks (12) feeding trial was conducted using thirty-five (35) Uda rams which were allotted to diets as T1, T2, T3, T4, T5, T6 and T7 having 0%, 10%, 20%, 30%, 40%, 50% and 60% inclusion levels of ITSR respectively, in a completely randomized design. The findings of the study revealed that the values obtained for nutrient intake and digestibility were significantly (P

A.A. Ibrahim1, 2, ahmedd20666@gmail.com, E.V. Solomin1, nii-uralmet@mail.ru 1 South Ural State University, Chelyabinsk, Russian Federation, 2 Middle Technical University, Baghdad, Iraq Ибрагим Ахмед Амер, аспирант кафедры «Электрические станции, сети и системы электроснабжения», Южно-Уральский государственный университет, г. Челябинск; Центральный технический университет, г. Багдад, Ирак; ahmedd20666@gmail.com. Соломин Евгений Викторович, д-р техн. наук, доцент, профессор кафедры «Электрические станции, сети и системы электроснабжения», Южно-Уральский государственный университет, г. Челябинск; nii-uralmet@mail.ru. Renewable Energy Sources (like wind energy) minimize the demand for other types of power. Wind energy generation has become a major power in some countries, covering the essential share in the Energy Balance in Holland, Spain, Brazil, Germany, China and others. The construction of new Wind Power causes new challenges for the transmission distribution infrastructure. However, environmentally friendly Renewable Energy has recently become an important part of generation in industrial applications, worth for distributed lines expansion. A significant part of electric machines used in Wind Industry are doubly fed induction motors (DFIM) used as electric generators. They earned the leading market position over the recent decade and continue their run. The machines of this type offer operation stability along with affordable costs. The outstanding technical benefits include the ability for variable speed operation and independent control of reactive and active power. To protect the rotor side converter (RSC) from transient overcurrent during voltage dips, the crowbar circuit protection is usually used. The paper analyzes and investigates the dynamic behavior of the doubly-fed induction motor, back-to-back converter, and the rotor side converter during symmetrical voltage dips using the crowbar protection system with MATLAB/Simulink simulation. In addition, it studies the crowbar circuit affects the diodes, switches, and resistances at the low voltage ride through (LVRT) capability enhancement. Возобновляемые источники энергии (такие, например, как энергия ветра) сводят к минимуму потребности в других видах энергоресурсов. Производство энергии ветра достигло значительного уровня во многих странах, например, в Китае, Голландии и Германии. Такой подход требует новых вызовов для распределенных электросетей. Возобновляемая энергия является одной из самых важных для человечества и обычно используется в промышленности благодаря покрытию пиков энергопотребления, не оказывая какого-либо воздействия на окружающую среду. Сегодня асинхронные машины двойного питания (DFIM) являются самыми распространенными на рынке производства электроэнергии за счет ветра. Данные изделия имеют экономически выгодные характеристики для работы в больших диапазонах переменной скорости вращения с независимым регулированием реактивной и активной мощности. Глухое замыкание на землю обычно используется для защиты преобразователя (RSC) со стороны ротора от переход- ных процессов во время падения напряжения. Целью представленной работы является анализ и исследование динамического состояния асинхронного двигателя двойного питания (DFIM), преобразователя встречно-параллельного включения и преобразователя со стороны ротора при симметричных провалах напряжения посредством системы защиты глухим заземлением с помощью программного комплекса MATLAB/Simulink. Кроме того, изучено влияние цепи глухого заземления (диода, переключателя и сопротивления) на повышение проходимости низкого напряжения (LVRT).

A study was conducted to investigate the disease incidence and the nutritional storability of cassava roots under different storage condition, Fifty pieces each of two varieties of cassava tubers TMS 30572 and TMS 4(2) 1425 were preserved using four storage methods namely ; Trench (re-burying the cassava roots in trenches and keeping them moist by watering them daily, applying a thick coating of mud, piling the tubers in heaps and a traditionally practiced method, by randomly spreading the tubers orderly . The samples were analysed for carbohydrate, calcium, phosphorus and vitamin C. The weight loss as well as number of diseased tubers were determined, the significant difference was conducted at ( p≤0.05 ). The mean results for the two varieties (TMS 30572 and TMS 4(2) 1425) showing the trend in the nutritional compositions and weight loss were also determined. The level of infestation of disease on the cassava tubers preserved by piling in heaps and mud application for both varieties are very low compared to the trench and the control method. The weight loss for both varieties, irrespective of the storage type is even along the storage period.Keywords: Cassava, Disease, Preserved, storability, Storage.