CRT (Cut Rag Tobacco) is a mixture of tobacco with other ingredients that will be used as the contents of cigarettes. Complaints collected during January-September 2019 obtained the biggest complaint, namely the presence of FM (Foreign Matter) contained in the CRT produced by PT.ABC. Complaints from consumers must be addressed so that consumer satisfaction is guaranteed. To find complaints that have the highest priority that must be addressed immediately, the FMEA method is used. After knowing the priority of disability that must be corrected then for decision making use AHP for decision making so that decision making is more structured and on target. From the FMEA, improvements were made to reduce FM bamboo boxes contained in raw material chopped which is used to produce clove cigarettes. Anticipation of the production process itself is already there with a sorter machine which is expected to eliminate bamboo boxes from tobacco whose effectiveness is still below 80%. Therefore it is necessary to make improvements so that later the sorter machine can reject FM bamboo boxes. From the results of the selection of priority improvements and comparisons of each category of improvement, namely the effectiveness of reject FM bamboo box, processing time, effectiveness of reject tobacco and cost. The choice of reject FM bamboo box category is highest with 50.11%, and the highest value for the effectiveness of reject bamboo box FM is upgrading the smart sorter machine because it can increase the effectiveness of reject bamboo box FM by 91.44%.

The Spallation target is the most critical part of an Accelerated Driven Sub-Critical (ADS) reactor system. In this paper a numerical study of fluid flow and heat transfer for two possible types of windowless spallation targets was done with finite volume CFD code Fluent. In the first target module, Lead-Bismuth Eutectic (LBE) falling downwards through annular nozzle and forming a free surface is simulated using two phase mixture model with cavitation mass transfer to obtain the interface. Second target with LBE flowing upwards horizontally in an inverted-U fashion is simulated starting with a basic sharp design and later including modifications to improve the flow and eliminate recirculation zones. Spallation heat was simulation and temperature profile revealed steady convection without heat accumulation.

The aim of the research is to uncover the motives of Taiz university students using WhatsApp, and the achieved gratifications from using it. This descriptive survey method was used to achieve the research objectives, and the research sample was chosen from students of Taiz Governmental University, and the two private universities; Al-Hikma and Alatta Universities. 180 students were randomly selected from the Faculties of Science and Probability. The most important results are that the degree of ritual motives for using WhatsApp is high, foremost among which is study, non-study studies, and spending leisure time, while utilitarian motives have a medium degree, on top of which is the cognitive motivation and communication with colleagues, where it was found that the degree of satisfaction resulting from the use of WhatsApp is medium. Satisfying gratification with escaping from reality, and creating a good and weak learning environment, as it became clear that the negative impact of using WhatsApp has a weak role, and the results showed that there is no statistical study between the averages and responses were achieved in the two areas of motivation use according to the gender variable (male, female), and there are statistically significant differences for alternatives positive effects. There are also statistically significant differences according to the age variable in regards to the motives for employment, while there are statistically significant differences in the two areas of satisfaction, and the positive effects appear between the two groups (less than 22 years old and more than 25 years) in favor of the age group (less than 22 years). And between the groups (22-25) and more than 25 years), in favor of the age group (22-25) years, and the results showed that the lack of statistical statistics according to the variables of the university and specialization (scientific - humanitarian) and type (government). However, there are statistically significant differences regarding the type of university in the motives for employing Taiz Governmental University students.

Thermal Probe Method (TPM) using transient plain source widely used to determine the effective thermal conductivity (ETC) of two phase materials. In this method, ETC of sample is determined by varying the concentration by varying thickness of the sample. The heating coil supplied with DC power is the source of heat which is in contact with surface of the sample. It is heated to temperature range between 80°C - 90°C and temperature is measured using J-type of thermocouple which is contact with the centre of the heating coil. The raise in temperature has been recorded for every 2 seconds by using lab VIEW and data acquisition system (DAQ) which is interfaced with the computer. The reliability of experimental setup has been carried out and the experimental error of 2% has been obtained which is well within the limit. The graph is plotted between in (time) VS temperature and slope is obtained at the mid-range of graph. The calculation is made by Fourier law of heat conduction and thermal conductivity is obtained for samples. The results shows that increase in concentration of the material resulted in increase in thermal conductivity.

This work studies the prospect of low cost biodiesel light diesel oil in a compression ignition engine. Four blends of biodiesel light diesel oil were prepared and their properties were studied. A compression engine test rig is setup. The performance characteristics of the blends were found experimentally. Also emission tests and smoke tests were performed. Conventional diesel and blends of pongamia biodiesel were also tested and a comparative study is established. Regression analysis was performed to remove the insignificant parameters and to find the effect of significant parameters on the result. Regression models for carbon monoxide emission, nitrogen oxide emissions and smoke opacity were developed. Optimization of parameters was done using Taguchi’s method to find the prominent input variables. Also optimum load to light diesel oil concentration were arrived at using signal to noise ratio plots.