Archives-J 

This paper presents sizing and control methodologies for a lead-acid flow battery-based energy storage system fed by Solar Photovoltaic system. The results show that the power flow control strategy does have a significant impact on proper sizing of the rated power and energy of the system. This paper focuses on the development of a control strategy for optimal use of the battery storage system through sliding mode controller. The effectiveness of this control strategy has validated through experimentation.

New transition metal [V(V), Co(II), Ni(II), Cu(II), Pd(II) and Cd(II)] complexes of (EPMPB) have been investigated in solution using Potentiometric and spectrophotometric methods. The composition of the complexes was determined to be 1:1 and/or 1:2 (M: L), the optimum conditions favouring the formation of the coloured complexes were studied extensively; protonation constants and their stability constants of the complexes were calculated. The stability constants of the formed complexes increase in the order Pd (II) > V (V) > Cu (II) > Co (II) > Ni (II) > Cd (II). Adherence to Beer's law was observed for the µgmL-1 concentration range form 0.31- 3.49 and 1.06 - 4.25(?gml-1) for Cu(II) ion and Pd(II) ions, respectively, Molar absorptive was 6,899 and 10,788 L mol-1 cm-1 for Cu(II) and Pd(II) ions, respectively.

Drip irrigation systems have a preference in selecting a suitable irrigation method in arid and semi-arid regions because of its high potential in uniform applying water in through a field. A proper management of drip irrigation system is, to some extent, dependent upon accurate understanding of wetting patterns distributions in soil under different combinations of soil type and emitter discharge rate. Using statistical distribution to estimate wetting front pattern in drip irrigation systems can improve their performance in different conditions. In this paper, the wetting area and water distribution on light, medium and heavy texture homogeneous soils in subsurface drip irrigation (SDI) and surface irrigation (DI) were evaluated. Experimental tests were carried out in a plexiglass lysimeter container with transparent walls. Emitters were buried at 15, 30 and 45 cm depths and discharge rates of 2.4, 4 and 6 L/h were applied. In this research, data of water front was divided into tree hourly periodic lengths of 2, 4 and 6. Then, with analysis of data in time series according to HYFA software output and goodness fit of Relative Residual Square Mean, suitable frequency distribution function for different conditions was evaluated. Based on relative frequency, the best fitted distribution for DI and SDI was found to be Normal and Pearson type III distribution (Moment method) and Normal distribution (maximum likelihood method).

Metal inert gas (MIG) welding is a fusion welding process having wide applications in industry. In any welding process, proper selection of input parameters is necessary to obtain good quality welds and consequently, increase the productivity of the process. Invariably, quality of welds is specified in terms of their ability to meet the service load requirements, zero-defect condition and/or cost-effective production. However, it is observed that a ‘Good Weld Bead Geometry’ can often be used to stipulate the weld quality as well as ensures one or more of the former considerations. The weld bead geometry is expressed in terms of six output parameters (called responses), viz., height of reinforcement (R), depth of penetration (P), weld bead width (W), per cent dilution (%D) and shape relationships such as weld penetration shape factor (W/P) and weld reinforcement form factor (W/R). This paper reports the experimental work with regard to developing a bead geometry-based criterion for acceptance of weldments prepared by MIG. Taguchi design method, comprising L16 orthogonal array (OA) was used to conduct the experimental with two replications and graphical method of analysis was used to arrive at the optimum combination of process parameters. The Responses were expressed in terms of six input process parameters, namely, wire feed rate (WFR), arc voltage (V), welding speed (WS), stand-off-distance (SOD), shielding gas flow rate (GFR) and parent material plate thickness (PT). Influence of the six main factors and their two-factor interactions were studied and the results are presented. It is observed that an increase in parameters like wire feed rate, welding speed, SOD and plate thickness will also result in a corresponding increase in reinforcement while they affect penetration in a negative way. On the other hand, a decrease in arc voltage results in an increase in reinforcement, but penetration decreases. The effect of GFR is typical, in the sense, as it is increased reinforcement decreases, but penetration shows an increasing trend. Further, weld bead width shows a positive correspondence with almost all input parameters. But, it has a negative relationship with SOD while it is unaffected by GFR. Also, the effect of 2-factor interactions have been studied and presented in this paper.

The present study describes degradation of Lacosamide under various conditions like, oxidation, hydrolysis, and thermal stress conditions. The drug was found to hydrolyse in acidic and alkaline conditions and no degradation was found in thermal stress condition and oxidation. The separation of the drug and degradation product was successfully achieved on a C18 column utilizing water (0.1 % triethylamine and pH 3.0±0.05 was adjusted using Orthophosphoric acid 85%v/v) and methanol in the ratio of 70:30 v/v. The detection wavelength was 215 nm. The method was validated with respect to linearity, precision, accuracy, and specificity. The response was linear in concentration range of 1 - 20 µg/mL. The value of slope and correlation coefficient found to be 42506 and 0.9996 respectively. The R.S.D value for intra- and inter- day precision studies were <1.169 and <1.263, respectively. The recovery of the drug ranged between 98.81 and 101.76% from a mixture of degradation sample.

With the huge upsurge of information in day-to-day’s life, it has become difficult to assemble relevant information in nick of time. But people, always are in dearth of time, they need everything quick. Hence clustering was introduced to gather the relevant information in a cluster. There are several algorithms for clustering information out of which in this paper, we accomplish K-means and K-Medoids clustering algorithm and a comparison is carried out to find which algorithm is best for clustering. On the best clusters formed, document summarization is executed based on sentence weight to focus on key point of the whole document, which makes it easier for people to ascertain the information they want and thus read only those documents which is relevant in their point of view.

In Tilapia aquaculture, it is more desirable to culture all male (monosex) population because they grow bigger and faster. The synthetic steroid hormones such as 17-?-methyl testosterone are commonly used to reverse sex in tilapia. Due to its latent health and environmental hazards, attention is presently being focused on the use of alternatives, such as plant extracts called phytochemicals. This study investigated the phytochemical “genistein” as a possible enzymatic aromatase inhibitor that could modulate the sex differential response in the gonad of sexually undifferentiated tilapia. Experimental diet supplemented with genistein (500mg/kg) along with a control diet were evaluated in the feeding of three days old tilapia fry (6mg-8mg) for eight weeks. Result shows that the presence of dietary genistein did not have any significance positive effect on the weight gain, SGR (%) and survival (%), although higher number of males were produced in the genistein fed fish but the phenotypic sex ratio was not significantly different (p>0.05) from the control.

The general aim of this study is to investigate the effect of exchange rate on financial performance of small and middle-sized companies in Mogadishu.Specifically, this study investigated the effects of Balance of payments, the effect of foreign direct investment, the degree of Inflation and the effect of Taxation. The related theories of exchange rate are Purchasing power Theory, Interest Rate Theory and Product Cycle Theory. This study was conducted through a descriptive study. In addition the study employed a survey research design in data collection. The sampling procedure of this study used non-probability sampling procedure particularly purposive sampling or judgmental sampling, this research employed quantitative data collection method whereby data was gathered by the use of closed ended questionnaires which are self-administered. The data collected was analyzed using the software called Statistical Package for the Social Sciences (SPSS) version 22 and results shown in terms of frequency distribution and percentages, the target population of the study is 160 employees of some merchandising companies in Mogadishu. A sample of 48 respondents was selected using Mugenda and Mugenda?s formula. The study used primary data. Data collection methods used included use of questionnaires. The selection sample technique was purposive or judgmental approach. A regression model was applied to determine the relationship between Balance of payments, foreign direct investment, inflation and Taxation as the independent variables and financial performance for small and medium sized enterprises as the dependent variable. The key findings of this study were: Most of the respondents agreed that International trade has a direct effect on the financial performance of the company. Most of the respondents also agreed to the fact that Company owners think they can create high profit for the company if they gain investment income. Company managers are always responsible when companies fail to implement financial transactions. The researchers recommended that: Somali merchants should try to increase domestic productions so as to add value to their money. The researcher?s second recommendation is that Somali government should control all import-export activities and try to increase exportations rather than importation Also top management of small and medium sized enterprises should motivate their employees to increase the performance.

The use of Nyctanthes Cu corrosion behavior was tested in aerated aqueous solutions of NaCl and KCl for different pH values. Polarization resistance (R¬¬p) measurements, polarization curves and AC impedance technique were used to obtain experim ental data. Nyctanthes found to exhibit ctionic type in acidic media solution of NaCl and KCl. The impedance spectra and curves at different potentials showed that the corrosion process of metal was characterized by two distinguishable capacitance loops. The charge transfer resistance Rt and polarization resistance, Rp values calculated from the interpretation of Nyquist and Boad plots were in agreement with the results of the other techniques.

The experiments were conducted to studied the effect of the different percent of Trigonella foenum--graecum (Fenugreek) seed extract by water and have been taken as syrup for the diabetic and high cholesterol patients, Amino acid analyzer are used in this study also saponin test.In this study there was a significant different effect of different seed extract concentration of Fenugreek (10%, 15% and 20%) in the diabetic and high cholesterol patient, at concentration 10% seed extract of Fenugreek have the low effect to decreased blood glucose(mg/dl)and cholesterol(mmol/L), but at concentration 15% seed extract of Fenugreek have the high effect to decreased blood glucose(mg/dl) and cholesterol(m mol/L),also at concentration 20% seed extract of Fenugreek have the highest effect to decreased blood glucose(mg/dl)and cholesterol(m mol/L) the normal range of blood glucose in human is 74-106(mg/dl) the normal range of cholesterol(m mol/L) in human is 0-5.2(m mol/L). It was found that the high effect of Fenugreek seed extract to reduce blood glucose, and saponin to reduce cholesterol