Archives-J 

Technologies have advanced rapidly in the field of digital signal processing due to advances made in high speed, low cost digital integrated chips. These technologies have further stimulated ever increasing use of signal representation in digital form for purposes of transmission, measurement, control and storage. Design of digital filters especially adaptive or semi adaptive is the necessity of the hour for SAR applications. The aim of this research work is to design and performance evaluation of 380-400 KHz Bartlett, Blackman and Chebyshev digital semi adaptive filters. For this work XILINX and MATLAB softwares were used for the design. As pert of practical research work these designs were translated using FPGA hardware SPARTAN-3E kit. These were optimized, analyzed, compared and evaluated keeping the sampling frequency at 5 MHz for 64 order. Both these filters designed using software and hardware were tested by passing a sinusoidal test signal of 381 KHz along with noise and the filtered output signals are presented.

This paper reports the design, implementation and testing of an indirect solar potato dryer. Indirect solar drying is the new technique of product drying. It is very efficient method than the direct type of solar drying. In this method the atmospheric air is heated in flat plate collector. This hot air then flow in the drying cabinet or drying chamber where potatoes slides are stored. Therefore moisture from the potatoes slides may lost by convection and diffusion. This method of drying is used to avoid direct exposing to the solar radiation. This method mainly reduces the disadvantages of direct solar drying. The experimental set up used for testing the performance of an indirect solar food dryer and determining the influence of various drying methods on the drying behavior of fresh potatoes slides. Evaluation of the dryer was centered on the moisture content reduction and temperature variations. 2 kg of fresh potatoes slides was used for evaluation. Temperatures of the drying chamber (drying cabinet), solar collector and ambient air were taken daily using digital sensors on an hourly basis from 9:00 am to 5:00 pm. Moisture content was taken at the beginning and at the end of each drying day. The test results gave temperature above 65 oC in the flat plate collector (solar collector), 50 oC in the drying cabinet, and the moisture content of 2 kg of fresh potatoes slides reduced to about 66.1 % in five days of drying.

Using concentrations of 0.0, 0.2, 0.4, 0.6 and 0.8mg diatomaceous earth (DE) 100 mL-1 larval food medium, a mean LC50 value of 0.6636mg was determined for the 3rd-instar larvae of the housefly Musca domestica. Time-course mortalities of the larvae at the determined LC50 level were assessed at 24h, 48h and 72h post-treatments. Finally, DE-induced changes in such vital reproductive attributes as egg-laying, egg-hatch, larval duration, number of dead larvae, pupal duration, number of dead pupae, number of adults emerged and female ratios from parental through F2 generations were recorded. Results indicated that DE could be used as an efficient larvicide against M. domestica and it was capable of inducing deleterious effects on all the reproductive parameters at the determined LC50. These findings have potential implications because the present DE concentration might be utilized for the control of this important vector species under household as well as field conditions.

In this paper, author attempts to establish relationship among output, employment, average productivity of labour and export of SSI sector in India and GDP in India during 1980-81-2014-15 through Simple regression analysis, causality test, cointegration and vector error correction models. The paper concludes that output of SSI sector has been increasing at the rate of 10.12% per year and exponentially at the rate of 0.554% per year during 1980-81-2014-15.The series is stationary, stable and divergent as indicated by ARIMA and AR models. Average productivity, employment and export of SSI sector have been rising at the rates of 1.68%, 8.43%,and 13.34% per year respectively during the same period. One per cent increase in export led to 0.48% increase in GDP per year during the specified period. Production, employment, average productivity and export of SSI showed two cointegrating vectors whose vector error correction model is stable, divergent and insignificant error correction process. India’s GDP,SSI sector’s output, employment, average productivity and export have two cointegrating vectors but its vector error correction model is stable, divergent and insignificant error correction having problem of autocorrelations. New policy recommendations of RBI and new government policy on MSME are likely to accelerate the performance of SSI and its contribution to the national economy.

The fish subsector is considered one of the most important sectors in many Arab countries and due to the challenges facing the sector, this research aimed at investigating the inter-trade and the economic indicators in the Arab countries. Data from the Arab Organization for Agricultural Development was computed to estimate the relative importance, coverage rate, trade exchange rate, exports share, commodity concentration coefficient, economic exposure and propensity to import and export. The comparative advantage is shown to be high only in Yemen and Mauritania based on the locations on coasts. Egypt has shown a good have high comparative advantages while Egypt has shown a higher production from aquacultures than all the rest of the countries. In general, Mauritania, Bahrain, Oman and Morocco have shown higher marginal propensity to export and other export-related indicators. Meanwhile, Bahrain, Kuwait and UAE have shown tendency to import. A great potential for economic integration between the Arab countries have been determined and it’s highly recommended that the Arab Organization for Agricultural Development develop and lead a strategy for fish value chain improvement and integration.

Faced with soil impoverishment due to the population explosion, a study was undertaken on maize cultivation at kilometer point 12 in the hinterlands of the city of Kisangani. The objective was to test, on degraded soil, the effect of a small amount of pig manure, integrated with the compost of hedge trimmings from the green carpet and enriched with increasing microdoses of NPK, on the growth and yield of maize grown in the Plates under Green Carpet (ATV) system. The experimental design was a split-plot, with the first factor being the production systems (ATV and CIB) and the second, the fertilisers. The results showed that organo-mineral fertilisation under ATV influenced the duration of the vegetative and reproductive phases in addition to yield. The organo-mineral fertilisers under ATV with composts resulted in a yield that was 1.2 times higher than that obtained with the control and the CIB. Also, the organo-mineral manures under ATV tended to shorten the crop cycle and promote better plant growth and development. The use of these fertilizers in maize cultivation could constitute an alternative to the drastic consequences of soil degradation.

The effects of aqueous leaf root and stem extracts of different concentrations (2.5%, 5% and 7.5%) of plant parts of Bahunia racemose Lam Common deciduous tree from ‘ Garbhagiri hills of pathardi Tahsil ( longitude19o 09’N, laditude 750 10’E) were tested on germination and seedling growth of Raphanus sativus L( Variety- Japani) Family Brassicaceae; Bahunia racemose Lam on germination and seedling growth of Raphanus sativus L., variety Japani, Leaf extract of Bahunia shows inhibition was not concentration co-related while stem and Root extract shows inhibition at higher concentration and promotion at lower concentration’ Data were analyzed by appropriate statistical method.

Objective: Biotene mouthwash is an antimicrobial agent used in prevention of periodontal disease, xerostomia and halitosis. it seems that no study has been conducted to evaluate its effect on prevention of alveolar osteitis(AO) .So the purpose of the study is to evaluate effective of biotene mouthwash on prevention of alveolar osteitis after extraction of permanent mandibular teeth and to investigate association of risk factors of AO with incidence of AO. Methods and materials: This randomized double blind clinical trial was conducted in oral and maxillofacial surgery department of Tabriz dental faculty. In case group (n=192), the patients received Biotene mouthwash and used it, three times a day for one week. Control group (n=197) received 0.09% sterile saline solution and used it similar to case group. The patients with the symptoms of AO were recalled for the diagnosis of alveolar osetitis on the third postoperative day. Results: In the experimental group 6 ( 3.1%) of AO incidence was found. While in the control group, 17 (8.6%) of AO was observed. The reduction in the incidence of AO in case group was statistically significant in comparison with control group p=0.03, p<0.05 for fisher`s exact test (Chi-square test). smoking was a variables that has significant relation to increased rate of AO. p=0.235, p<0.05. Conclusion: It was concluded that the use of Biotene mouthwash can be effective in reducing the incidence of dry socket after extraction of mandibular teeth. Smoking was significantly associated with the increased incidence of alveolar osteitis.

Normal concrete was prepared with a water-cement ratio of 0.50. cube specimens were cast for testing the compressive strength at 7 and 28 days of curing respectively using three curing methods namely immersion, sprinkling and Plastic sheeting, curing to cure the cube specimens until the day of testing. Test results indicates that water curing (WAC) as well as sprinkling (spraying) curing provided much better results than membrane (Plastic Sheeting) method of curing. The rate of drying was significant when the specimens were subjected to membrane (Plastic sheeting) method of curing. This thus hampered the hydration process and thus affected the compressive strength property of the hardened concrete. The overall finding of this study suggests that concrete should be cured by water curing to achieve a better compressive strength.

Education is bound to be affected if safety and security concerns of students are not addressed fully. With the emergence of the need to present ideas, views and opinions, students usually engage in unruly behavior aimed at seeking attention from the management to listen to them. The objective of the study was to determine how Students discipline affect safety measures in public boarding secondary schools in Trans- Nzoia County, Kenya. The study used descriptive survey research design. The study targeted 40 principals, 754 teachers, 22,562 students and 84 security officers in 40 public boarding secondary schools in Trans-Nzoia County. Simple random sampling and purposive sampling procedure were used to select boarding secondary schools. The total sample was 403 respondents which comprised of 20 principals, 143 teachers, 220 students and 20 security officers. Questionnaires, interview schedule, document analysis, observation checklist and focus groups were used as data collection instruments. Data was analysed using descriptive statistical techniques that were frequencies and percentages. Data was presented in tables and charts. The student indiscipline was a safety threat to other students. The common indiscipline cases were theft, sneaking, drug abuse and fires. Drugs and substance abuse played a major role in influencing indiscipline in secondary schools. This study recommends that teachers under the supervision of the principals should conduct regular impromptu search of the students’ items and the school facilities in order to discover security gaps that need to be sealed in the schools. The students, teachers, security officers and any other stakeholders should be sensitized on the safety rules.