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Volume 5 Issue 7 (July 2018)

S.No. Title & Authors Page No View
1

Title : Studies on the Suitable Rot-Proof Processes for Manufacturing More Sustainable Jute Based Nursery Pot

Authors : Shamina Jafrin, F.A. Dilruba, Md. Kaiser Haider

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Abstract :

Cellulosic jute fabric was treated with different types of rot proofing agent for increasing the durability of the jute based nursery pot. Different types of rot-proofing salts were found in the market but among these it was found that copper compound was the best chemical to use as a rot proofing agent. In this experiment, two different types of processes were optimized. These processes were a) Carpet backing clothes (CBC) were treated with different concentrations of a mixture of copper sulphate and sodium carbonate solution and b) jute fabrics were treated with different concentrations of comsol solutions. The treated jute fabrics were tested and evaluated for determination of liquor pick-up, tensile strength, copper deposition, cost analysis, soil effect, and plant growth rate to optimize the longevity of the natural product as jute nursery pot. Seeds were sown in the jute based nursery pots. This experiment was conducted in the soil condition. The longevity of the jute based nursery pots were increased by rot-proofing treatment. After certain period, jute nursery pots were converted into biomass. This product does not create any harmful effect on the environment for plantation and their production, use and disposal. It was observed that, 25% comsol solution treated jute nursery pots exhibited a maximum longevity of fourteen months but10% copper sulphate mixed with 2% sodium carbonate treated jute nursery pots showed durability about fifteen months. Comsol is a costly chemical but copper sulphate salt is cheap. From the experiments, it was found that by increasing the percentage of copper sulphate solution (12% and14%) for the treatment of jute nursery pot, the percentage of copper deposition was increased but tensile strength of the fabric was decreased. The longevity of more sustainable jute nursery pot was about fifteen months and it was achieved by 10% copper sulphate solution treatment. The treated nursery pots rather showed better growth rates of the plants in comparison to those plants of control pot. This treatment did not change the neutral nature of the soil. It was found from soil analysis that jute nursery pot converted into biomass. Jute is a 100% biodegradable and eco-friendly material and do not pollute our environment like poly pot. We should encourage the uses of jute products so that we can contribute to our environment to make our planet a clean and healthy place to live.

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2

Title : Fourier Transform Infrared Spectroscopic Analyses of Argon and Oxygen Plasma Treated Jute

Authors : Md. Masroor Anwer, Md. Abdullah Kayser, Shuranjan Sarkar, S M Mahruf Hossain, Sharmin Akter, Tahnin Bintay Kamal, Fatema Nusrat Jahan

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Low temperature plasma (LTP) treatment, a kind of environmental friendly surface modification technique, was applied to biodegradable and ligno-cellulosic jute fibre with the use of two nonpolymerizing gases, namely argon (Ar) and oxygen (O2) at various discharge power levels of 50, 75 and 100 W, and exposure times 5, 10, 15 and 20 min. with a flow rate of 0.2 L/min where W, min. and L/min stands for discharge powers, exposure times and liter per minute for the LTP treatment of the fibres. Fourier Transform Infrared (FTIR) spectra of both raw and low temperature Ar and O2 plasma treated jute were studied at various discharge power levels and exposure times. The analyses of the chemical structure by FTIR spectra of raw jute and plasma treated jute fibre showed similar spectra with the change in the peak intensity and shift in the peak position. From FTIR spectra, the changes at the bands around 1730, 1650, 1235, 1077, 1030 and at 890 cm-1 revealed surface chemistry of fiber changes after plasma treatment. FTIR has given evidence of moisture removal from the fibre.

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Title : Scanning Electron Microscopy Analysis of Argon Plasma Treated Jute Fibre

Authors : Md. Masroor Anwer, Md. Abdullah Kayser, Shuranjan Sarkar, S M Mahruf Hossain, Sharmin Akter, Tahnin Bintay Kamal, Fatema Nusrat Jahan

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Abstract :

Low temperature plasma (LTP) treatment, a kind of environmentally friendly surface modification technique, was applied to biodegradable and ligno-cellulosic jute fibre with the use of nonpolymerizing argon (Ar) gas at various discharge power levels of 50, 75 and 100 W and exposure times 5, 10, 15 and 20 min. with a flow rate of 0.2 L/min. By means of scanning electron microscopy (SEM), the influence of treatment time and discharge power on the surface morphology of the surface of LTP treated jute were studied and were compared with that of raw jute. SEM microphotographs reveal that the roughness of the fibre surfaces increases with the increase of discharge power and exposure time. This is caused due to the bombardment of high energetic ions on the fibre surface and the fibres become sputtered.

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Title : Evaluation of antifungal activity of Moringa oleifera and Jatropha curcas extracts as a natural fungicide against adults of Acanthoscelides Obtectus

Authors : Karl Tshimenga, Alfred Mukuna, Junias Kabele, Jean-Noël Mputu

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In the optics to fight against the weevil Acanthoscelides obtectus, the devastating main thing of the bean (Phaseolus vulgaris L.) stored in Kivu and to reduce the exhibition of the organisms not targeted to dangerous insecticides, alternative methods are required. At this point of view, studie on the effect of Saponins and Steroids extracted from the sheets of Moringa oleifera and from Jatropha curcas was led to compare the efficiency of the extracts of these two plants in comparison with an organophosphate commercial insecticide (Malathion) used as witness positive on weevil. The extracts Saponines of, the Moringa caused a maximal mortality of the order of 86,1±1,1 % to a dose 1,5 g/ml followed Steroids extracts of Jatropha with a 69,0±1,7 % mortality rate, whereas the Malathion showed itself more successful by eliminating insects at 92,9±1,9 % and at a dose of 0,4 g/ml after 72 hours of exhibition.

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Title : Feasibility Study of RE Simulation Software: A Comparative Financial Study between Enhanced PV Solar technology and Diesel based Irrigation System

Authors : Md Rabiul Islam, Md.Moslem Uddin, Atik Faysal, Pronob K. Ghosh

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Bangladesh is an agricultural country. One-third land of this country is in off-grid area which force farmers to use diesel for irrigation purpose. Several research works show that PV Solar technology is useful for irrigation system rather than conventional fossil fuels using various simulation software. But the ambiguities arise to select simulation software for techno-economic analysis. This study identifies the effectiveness of RE simulation software for techno-economic analysis and compare the benefits between PV Diesel and solar PV based water pumping system. The efficacy of mostly used RE simulation software will be analyzed to study financial feasibility of solar PV based water pumping system comparing to Diesel based system assuming a practical project in Bangladesh (a Bangladeshi farm named “Rajshahi Krishi Khamer”). This farm is now using Diesel based water pumping system for irrigation. Two contemporary and essential software, HOMER (Hybrid Optimization Model for Electric Renewable) and RETScreen are used to demonstrate the case studies. Some important issues about solar as well as Diesel based water pumping system are taken into consideration to accomplish this research work. The proposed studies also count the technical and environmental effects and eventually, address alternative sources of electric power generation.

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Title : Characterization and Effects of a 12.5 mm Nominal Maximum Size Aggregate in Concrete Strengths Optimization

Authors : Isaac Akiije

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Using granite 12.5 mm nominal maximum size aggregate in the production of concrete is increasing in Nigeria. For this reason, its optimization in use for satisfactory and adequacy in relationship to strength and durability for highway rigid pavement construction in Nigeria is a concern. In this study, granite of 12.5 mm nominal maximum size aggregate gradation as concrete constituent has been used for four different types of 1:2:3 mixtures along with Portland cement and river sand. Of the four different types of concrete production carried out, Type B0 is of a normal concrete using 0.4 water cement ratio (w/c) with no addition of superplasticizer to the concrete produced. Others are superplasticized concretes Types B1, B2 and B3 that were individually produced with addition of varied 1.0%, 1.25% and 1.5% of superplasticizer to cement weight using 0.3 water cementitious materials ratio (w/cm). A total number of 180 concrete specimens were produced in this study. 60 specimens were 550 mm x 150 mm x150 mm beams; another 60 specimens were 150 mm x 150 mm x 150 mm cubes while additional 60 specimens were 150 mm diameter with 300 mm of length cylinders. Tests were duly carried out upon hardened specimens moist cured for 7, 28, 56, 90 and 120 days for flexural, compressive and tensile strengths accordingly. The results of cement used gave relative density value as 3.15, bulk density as 1160 kg/m³ with its fineness being 5% retained on 45 μm sieve. River sand used is of well-graded fine aggregate while granite employed is of uniformly graded coarse aggregate. Concrete mix design flexural strength of 5.3 N/mm² at 1.25% superplasticizer dosage achieved and satisfied standard specification requirements for highway rigid pavement whereas 4.9 N/mm² was achieved by normal concrete which could not satisfy same and uneconomical.

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7

Title : Laws of Muslim Marriage from the concept of the Holy Quran

Authors : Syeda Shajia Sharmin , Dr Mir Mohammad Azad

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Marriage is one of the most important aspects of Human life. Here in this write-up various aspects of Muslim marriage. The laws relating to marriage should known by the Muslims as an indicator to live a moral and legal life. However the knowledge of laws has a vast impact on the civilized life of Muslim. This research is designed to grasp the proper information of laws related to Muslim marriage. This research are conducted in order to determine the legal and beyond aspect of Muslim marriage with its effects. The research is expected to benefit our next generation so that they will be able to gather knowledge regarding marriage to live their life with the light of Quran and laws of the land. Now-a-days as a bad impact of globalization “same sex marriage” trend has started again in the world which indicated “transgresses the limits” of nature in the eye of Islam. Now it is the high time to create awareness among the generations with the knowledge of personal laws as well as laws of Bangladesh relating to marriage which help all of us to achieve the welfare and as a whole of the world.

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8

Title : Anti-termite efficacy of hydro-alcoholic extracts from wild giant taro plant (Alocasia macrorrhizos)

Authors : Dr. Neil L. Egloso

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A method of measuring the percentage of mortality and its cytotoxicity against white termites Odontotermes obesus (Isoptera: Odontotermitidae) using plant extracts from wild giant taro (Alocasia macrorrhizos).  The utility of this technique is demonstrated using the different samples of plants extracts from leaves, rhizomes, and stalks using water and ethanol as solvents. The results of the study showed that the extraction of samples from stalks using ethanol were highly acidic, high mortality rate on brine shrimp nauplii and high toxicity level with an LC50 value of 39.75 g/ml as compared to the positive control. Almost no mortality was found in the control group.  Hence, the extraction from the stalks proved to have high percentage yield and anti-termite efficacy using ethanol as solvent. More details about phytopharmacological studies must be investigated and it is recommended that people should be educated about these problems so as to prevent further poisonings and decrease use of this plant for decorative household purposes.

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9

Title : Proportional Integral (PI) Control of a Single Joint System for Robotic Application

Authors : Daniel Effiong Oku, Ibrahim Ahmed Tunde, Asiya Effiom Asiya

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The aim of this work is to demonstrate how a Proportional Integral controller can be implemented in a systematic format by pole placement technique as against the conventional method of tuning a PI controller using Nichols Ziegler method and the controller is applied to test the dynamic response of a single joint system, consisting of a DC motor as the actuator and a coupled body that forms a single joint system with the motor acting as an actuator to cause rotation of the arm. The PI controller is designed and implemented on the system using pole placement technique. The results analysed shows that the controller is able to overcome steady state offset while maintaining the systems stability. In the time domain, a set-point of 1 radian was tracked at the output with a time constant of 0.775s and peak overshoot of 19%, while in the frequency analysis an infinite gain margin was realised and a phase margin of 81.5335o were both gotten from Bode and Nyquist plots respectively, The performance of the system was greatly improved by the implementation of the PI controller when compared to the open loop system whose step response was unstable with a gain margin of 0.1700 and a phase margin of 65.9822o respectively.

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Title : Treatment of the Industrial Wastewater by Chemical Coagulation Followed by Biological Process

Authors : Sofyan Al-Dulaimi, Gabriel Racoviteanu

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In this study the effect of the chemical treatment by Coagulation-Flocculation process followed by biological process by MBBR system on the industrial wastewater, generated from a local meat processing wastewater in Bucharest-Romania was evaluated.  Ferric chloride was applied on high and low strength effluents as a chemical coagulant at different doses using a bench-scale device (Jar-test apparatus); after that they were subjected to the biological treatment. Moving bed biofilm reactor (MBBR) with capacity of 13.7-liter was constructed and operated at a different organic load and at different hydraulic retention time (HRT). Results indicate that the chemical coagulation can be useful pre-treatment option for the meat processing effluents, in addition to that results indicted the overall treatment process is an effective treatment process to produce high effluents quality that can be re-used in several application.

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Title : Pattern Recognition of Pitch Motion for A New High Speed Gliding-hydrofoil Craft and Its Method

Authors : Gao Shasha, Yang Songlin, Liu Man, Shi Yan, Cao Zhiwei

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In this paper, a series of still water free decay experiments were carried out on a gliding-hydrofoil craft. By establishing the mathematical model of pitch motion mode, and based on system identification theory and genetic algorithm, the system identification software was written in C# language. (1) A mathematical model of 3 kinds of pitch motion was established. The pitch motion of three different drafts and different initial pitch angles were identified and calculated. The conclusion is that the fitting effect of the equation 1 is the best; (2) By calculating the angular velocity forecasting values for various operating conditions, the errors between the experimental values and the fitted values were analysed. It is found that the consistency of the forecast value and the test result is good, which proves the reliability of the system identification software; (3) Based on the identification results, the variation of each hydrodynamic torque coefficient with draft and initial pitch angle analysed. The analysis results and methods can provide a reference for sea-keeping research of such unmanned craft, and provide important technical support for subsequent optimization design of craft type.

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Title : Performance Analysis of Adaptive Image Denoising Techniques for Different Levels of Wavelet Decomposition using Orthogonal and Compactly Supported Wavelet Families

Authors : Ram Paul, Singara Singh Kasana, Rajesh Kumar Gupta

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This paper presents performance analysis of image denoising techniques using different orthogonal and compactly supported wavelets functions of various vanishing moments. The wavelet-based methods such as universal thresholding, level-adaptive and subband-adaptive thresholding are compared with the state-of-the-art Wiener filtering. The wavelet coefficients are modeled by the generalized Gaussian distribution random variables within the subbands. A minimal threshold is calculated from the noise standard deviation of the diagonal subband of the first decomposition level. Then the soft thresholding scheme is applied. The procedure of noise reduction is applied with Daubechies, Symlets and Coiflets wavelet functions of different vanishing moment upto forth decomposition levels. Then the efficiency and performance of these image denoising techniques are compared based on their Peak Signal to Noise Ratios and visual perception. The wavelet domain thresholding is evaluated and examines some improvements for different image complexities contaminated by Gaussian noise of various densities.

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13

Title : Automated Attendance System Using Face Recognition Technique

Authors : Sumanta Chatterjee, Adit Jana, Adrija Ganguly, Aditi Ghosh

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The objective of this system is to present an automated system for human face recognition for an organization or institute to mark the attendance of their students or employees. This paper introduces face detection method using the Voila and Jones algorithm and recognition using correlation technique. The system will record the attendance of the students in class room environment. The above system is fully automated and easily deployable. User gets an authentication to upload the image containing file and also to view the attendance.

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Title : The Research on Driving force and Elements of Main & Side Hulls of Amphibious Maintenance Trimarans in Wind Farm

Authors : Yunping Xie, Yunsiya Zhou, Song yu, Weigang Xie, Liangdong Qi

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This paper are based on requirements of maintenance on intertidal wind farm in China, Through demonstration, comparison and analysis, it can be determined that the propulsion system on water adopts regular propeller, driving mode on land adopts wheeled mode. For power transmission, mechanical transmission is used while sailing on water and hydraulic transmission is used while driving on land, therefore an affordable, feasible as well as reasonable single-motor propelled system can be determined. Numerical simulation is used to analyze and calculate hydrostatic resistance, pitch and heaving of several amphibious maintenance trimarans which adapt different main, side hull arrangements in regular wave and determine relative position and scheme of main, side hull of amphibious maintenance trimaran. The research results in this paper will provide references for the design and research of amphibious maintenance ship for offshore intertidal wind farms.

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Title : Dry Anaerobic Co-digestion of Cow Dung with Excess Sludge at Low Temperature

Authors : Ajay Kumar Jha

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Low evolution rate of anaerobic microbes during psychrophilic condition (<20oC) affects anaerobic digestion process severely. It is also observed that the constituent bacterial consortiums are less active at low ambient temperatures and consequently it causes the drop off in the efficiency of anaerobic fermentation process. The performance of bioreactors even more decreases with the increment in solid content in the feedstocks. It is therefore great challenge to stabilize organic solid waste economically in cold and hilly regions. The purpose of this single-stage batch cultured investigation was to assess the effect of increment in inoculum amount on semi-dry anaerobic digestion process of cow dung with excess sludge at 15±1oC for 84 days. The biogas yields for 15%, 30%, 45% and 60% inoculum based on wet-weight were 13.33, 19.37, 23.99, and 21.64 L/kg with methane of 8.41, 12.19, 15.15 and 13.66 L/kg, respectively. Moreover, the specific methane yield was highest when the psychrophilic semi-dry anaerobic digestion process was inoculated with a mass of 45% of the substrate.

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