This study was designed to highlight the culture techniques and socio-economic conditions of cuch... more This study was designed to highlight the culture techniques and socio-economic conditions of cuchia farmers. The study used primary data collected from Adamdighi upazila in Bogura district of Bangladesh for a period of 120 days from 05 March to 26 June 2016. Three different experimental treatments were used. For socio-demographic factors, two-stage stratified sampling design was used in this study. The target population was Cuchia farmers. So, a total of 90 Cuchia farmers were finally selected for analysis. One way ANOVA with multiple comparison test was applied to identify significant treatments. Cobb-Douglass production function was used to determine the contribution of the most important variables in the production process of Cuchia farming. Analysis showed that, more than 80 percent of Cuchia fish survived with fish fry and snail meat feed. All the mean differences were statistically significant to compare Cuchia meals between two periods of time. For both cases weight and heigh...
Indonesian Journal of Electrical Engineering and Computer Science
A wireless gigabit alliance (WiGig) is widely known for higher bandwidth which operates at 60GHz ... more A wireless gigabit alliance (WiGig) is widely known for higher bandwidth which operates at 60GHz unlicensed spectrum for super-fast data speed over short distances for millimeter-wave band application. This study offers an efficient, compact microstrip patch antenna for WiGig with a lesser return loss -50.45 dB (60 GHz). The gain and directivity of the proposed antenna are 13.01 dB and 13.42 dBi. It provides higher efficiency of around 91%. The proposed antenna also covers another mm-wave band that is at 95 GHz. The U.S. military uses electromagnetic radiation of 95 GHz as a non-lethal weapon. So, the anticipated antenna can be used for a miniaturized active denial system. The proposed antenna has a good gain, directivity, and efficiency for the multigigabits/s data rate. The aforesaid properties imply that it can be used for wireless personal area networks (WPAN) and wireless local area network (WLAN) and fifth-generation (5G) applications too.
Research in Agriculture Livestock and Fisheries, 2020
This study was conducted to monitor the present condition of endangered fishes and productivity o... more This study was conducted to monitor the present condition of endangered fishes and productivity of Teesta river closest to Teesta barrage situated in the Lalmonirhat district of Bangladesh. Water and sediment samples were collected twice in a month during the study period from six different (3 upstream and 3 downstream) sites with three replications for each. Required information about threatened fishes was collected from the sampling region associated fishermen and fish markets. The study disclosed over 50 threatened fish species in Teesta river including several threatened fishes namely Bagarius bagarius, Sisor rabdophorus etc. The commonly available endangered fishes were Macrognathus aculiatus, Mastacembelus armatus, Barilius tileo, Raiamas bola, Botia dario, B. lohachata etc. which are rarely available in nationwide. Planktonic flora and fauna determination revealed that comparatively higher density of plankton (n >11500 per liter) as well as more number of planktonic flora ...
Asian-Australasian journal of bioscience and biotechnology, 2017
A culture experiment was conducted to see the growth and production performance of Vietnamese koi... more A culture experiment was conducted to see the growth and production performance of Vietnamese koi (Anabas testudineus) with Magur (Clarias batrachus) at different stocking densities in a farmer's ponds under semi-intensive rearing system for a period of 120 days. The experiment was conducted in three ponds at Rahmatpur of Muktagachha Upazila of Mymensingh district from 5 August to 5 December, 2013. The size of ponds were 24 (T 1 ), 24 (T 2 ) and 24 (T 3 ) decimal with an average depth of 4 feet. Three different stocking densities were tested, namely treatments T 1 (400 fish /decimal, 350 Vietnamese koi and 50 magur); T 2 (450 fish /decimal, 400 Vietnamese koi and 50 Magur) and T 3 (550 fish /decimal, 500 Vietnamese koi and 50 Magur). Ruposhi Bangla feed was used in all treatments two times daily from the beginning of the fry stocking. The initial weight of Vietnamese koi and Magur were 5±0.00 g and 2±0.00 g respectively. The initial length of Vietnamese koi and Magur were 2.54 and 3.50 cm respectively. The average highest final weight gain of Vietnamese koi was (138.71±0.03 g) observed in T 1 and followed by T 2 (135.65±0.12 g) and T 3 (129.29±0.49 g). Similarly, the average highest final weight gain of Magur (76.00±0.58 g) was observed in T 1 and followed by T 2 (68.36±0.43 g) and T 3 (62.61±0.58 g) respectively. The average highest final length gain of Vietnamese koi (17.38±0.05 cm) was observed in T 1 and followed by T 2 (17.00±0.04 cm) and T 3 (16.33±0.03 cm). Similarly, the average highest final length gain of Magur (21.30±0.09 cm) was observed in T 1 and followed by T 2 (17.00±0.05 cm) and T 3 (15.87±0.02 cm) respectively. The survival rate of the stocking Vietnamese koi and Magur were recorded 95.14 and 72.00 % in T 1 ; 93.25 and 64.00% in T 2 ; 90.80 and 68.00 % in T 3 respectively. Fish production in T 1 , T 2 and T 3 were 48.93; 52.79 and 60.83 kg/decimal/120 days, respectively. The total production of T 3 was increased with the increasing of stocking density compare to T 2 and T1. The benefit-cost ratio (BCR) was higher in T 3 where BCR was 1.67 and on the other two treatments BCR was 1.53 in T 2 and 1.52 in T 1 although the highest production was obtained in T 3 but individually growth performance of Vietnamese koi and Magur were higher in T 1 . Based on the result of the present experiment, farmers could be suggested to rear Vietnamese koi with Magur at the stocking density of 550 fish/decimal (500 Vietnamese koi and 50 Magur) which was the highest density tried to get more production and financial benefit. Further experiment need to be conducted by taking higher density than the 550 fish/decimal for the optimization of stocking density to get more production and benefit.
International Journal of Electrical and Computer Engineering (IJECE), 2021
The use of unmanned aerial vehicle (UAV) has been increasing rapidly in the civilian and military... more The use of unmanned aerial vehicle (UAV) has been increasing rapidly in the civilian and military applications, because of UAV's high-performance communication with ground clients, especially for its intrinsic properties such as adaptive altitude, mobility, and flexibility. UAV deployment can be monitored and controlled through 5G wireless network as user equipment (UE) along with other devices. A highly directive microstrip patch antenna (MPA) could establish long-distance communication by overcoming air attenuation and reduce co-channel interference in the limited region if UAV uses a specifically dedicated band, which might enhance spatially reuse of the spectrum. Also, MPA is highly recommended for UAV because of its low weight, low cost, compact size, and flat shape. In this paper, we have designed a highly directive single-band 2×2 and 4×4 antenna array for 5.8 GHz and 28 GHz frequency respectively for UAV application in a focus to deploy UAV through 5G wireless network. H...
The study was carried out to access on the present status of Tilapia (Oreochromis mossambicus) ma... more The study was carried out to access on the present status of Tilapia (Oreochromis mossambicus) marketing in Jessore sadar in Jessore district. Study period was carried out during June 2013 to December 2013. For the market survey, two important fish markets in Jessore town, namely Boro Bazaar and Rail-station Bazaar Similarly, two important local fish markets in the Jessore Sadar namely Churamonkati Bazaar and Ambot-tola Bazaar were selected to carry out comparative studies of tilapia marketing between town and local markets. A total of 80 traders were interviewed in Local and Town markets, 40 in each area. In the study area 55% of harvested tilapias are sold to the local agents, while the rest (45%) are sold to the suppliers and about 60% of tilapias are transported to the boro bazaar. The rest (40%) of the tilapia, which are under-sized, are transported to nearby local markets. The average farm-gate prices of tilapia varied between Tk 55 and Tk 85 per kg. According to the survey, a...
The study was conducted at pitambarpur, under the union of shinghajhully, Chaugachha, Jessore in ... more The study was conducted at pitambarpur, under the union of shinghajhully, Chaugachha, Jessore in Bangladesh. The study period was carried out during September to December, 2014. In the selected areas, the study was conducted on 45 persons. The collected information was totally interview and observation based study. In the study area it was found that 54% farmers used semi pucca, 19% of fish farmers used to live pucca houses and rest of 27% farmers used to live earthen houses. The percentage of age distribution was 5% farmer was 25-35 years, 10% farmer was 35-40 years and rest 85% farmer has the age of 40 and above. It was observed that 5% of finance are contributed by farmers, 73% farmers got finance from bank whereas 22% farmers took finance from local moneylenders. About 97% of the fish farmers used tube well and rest 3% of the farmer uses pond water. In Pitamborpur 90% of farmers are illiterate and rest 10% farmers are literate. About 45% traders has own bank account but only 55%...
Marketing of fish and fishery products in Dinajpur and livelihoods of the fish retailers were stu... more Marketing of fish and fishery products in Dinajpur and livelihoods of the fish retailers were studied during the period from January to May, 2013. A total of 60 fish retailers were interviewed for obtaining pertinent data. A survey questionnaire was developed, pre-tested and finally used for collection of data. The collected data were tabulated using conventional statistical tools. The result showed that the livelihoods of a large number of people are associated with fish and fishery products distribution and marketing in six different markets. Three types of marketing channel were found to be operated in the selected markets. The shorter marketing chain which included the fish farmers, retailers and consumers was found to be more beneficial to the fish producers. Fish traders in village markets generally operate a capital of around TK. 8,000-10,000 and traders in town markets a capital of around TK. 10,000-20,000 per day. It was found that most of the fish traders used their own mo...
The study was conducted on the livelihood approach of fry collectors at Shyamnagar upazila under ... more The study was conducted on the livelihood approach of fry collectors at Shyamnagar upazila under Satkhira district. The objective of the study was to assess the present livelihood status, to identify the socio-economic condition and problem associated with the alternative livelihood approach of fry collectors. The survey was conducted on three unions of Shyamnagar upazila adjacent to Sundarban as study area. In the study area average family size was 5 persons per family. The maximum age level was 20-30 years old. Among the fry collectors 66% was male and 34% was female. Among them 62% was Muslim and 38% was Hindu. About 78% of total fry collectors are landless in the study area. Literacy was 31% of them where female literacy was 28% and male literacy was 72% and most of them can sign only. Most of the collectors about 63% lived in mud walled with golpata shed house. About 73% families have two earner and 68% have single family. Peak season of fry collection was March to May. For col...
The present study was conducted in Jhikargacha sub-district of Jessore district with the view to ... more The present study was conducted in Jhikargacha sub-district of Jessore district with the view to evaluating status of polyculture of Pangasius hypophthalmus with carps from July to December 2012. The mean age and experience of the respondents was 41.28±12.19 and 9.48±3.12 years respectively. Culture pond size was 0.41±0.21 ha (0.343 to 0.478 at 95% CL). 67.50% culture ponds were leased ponds and mean yearly lease value was 535364.70±468224.20 BDT/ha. All the ponds were rectangular in shape and perennial in nature. During preparation of pond, all the ponds were dried by draining out the water. Liming was done at 229.30±118.70 kg/ha (pre-stocking) and 250 kg/ha (post-stocking). Application rate of various fertilizers during post stocking management were recorded as- 155.12±79.10 kg/ha (cow dung); 158.27±79.85 kg/ha (urea); and 79.90±42.93 kg/ha (TSP). Five species of fishes were found to be stocked at the rate of 7377 individuals/ha including 93.10% P. hypophthalmus seeds and 6.90% ot...
The present study was carried out to know the artificial breeding of Ompk pabda, Heteropneustes f... more The present study was carried out to know the artificial breeding of Ompk pabda, Heteropneustes fossilis and Pangasius hypophthalmus using pituitary gland (PG) from June to August 2014, in the hatcheries in Jessore region. Brood stock of Pangus, Shing, and Pabda was developed in the hatchery. A total of 10 hatcheries were included in the study. Brood fishes were reared in the brood rearing pond by providing artificial diet for good health and full maturation. Brood fishes were injected with PG in different months June to August. Both male and female were injected with PG. In Pabda, Shing and Pangus first PG dose was applied at 8-10, 30-35 and 1-2 mg PG/kg of body weight of females respectively. After 1 st PG dose of Pabda, Shing, and Pangus (6 hours later) female were treated with 2nd doses at 10-12, 60, 8-10 mg PG/kg of body weight, respectively. At the time of second dose of female, the males were also treated with single PG dose. The males of Pabda, Shing and Pangus were treated ...
International Journal of Fisheries and Aquatic Studies, 2018
A yearlong study was conducted to observe the present status of integrated aquaculture in Nilpham... more A yearlong study was conducted to observe the present status of integrated aquaculture in Nilphamari district of Bangladesh. Data were collected from 76 farmers using a questionnaire. Three different types of integrated aquaculture systems were observed: rice-fish culture (46%), fish-horticulture (33%), and fish-poultry culture (21%). Fishes were cultured in polyculture systems. Banana, papaya, vegetables etc. were planted in pond dikes. Other important findings were: age of most farmers (76%) between 41 and 60 years, the highest percentage of educational qualification class eight (40%), trained farmers (66%), and average farm size 0.29 ha. Major problems were low water retention capacity of the soil, lack of quality seeds, lack of capital, high labor cost, insufficient extension services etc. Integrated aquaculture practices were at the preliminary stage in the study areas. Therefore, the socio-economic conditions of the farmers can be uplifted by adopting improved farming systems ...
International Journal of Fisheries and Aquatic Studies, 2018
The present work was undertaken to evaluate the status of fish farmer and farming conditions in S... more The present work was undertaken to evaluate the status of fish farmer and farming conditions in Saidpur Upazila of Nilphamari district. Data were collected from 50 pond owners based on a questionnaire survey for a period of five months from January to May, 2014. It was found that most of the farmers (88%) were involved in carp polyculture. A large number of farmers (46%) started fish farming before one to five years. The average pond size was 0.22 hac. The average dose of organic fertilizer was 2964 kg /hac /yr and inorganic fertilizer such as urea and TSP was 308 kg/hac/yr and 197 kg/hac/yr, respectively. The average annual yield was 2593.5 kg/hac/yr and average annual income of fish farmers was 58306 Tk/hac/yr. Lack of proper management and technical knowledge, theft, disease of fishes, lack of money and inadequate extension services were the most important constraints for fish production. It is therefore, necessary to provide necessary training to the farmers, institutional and p...
Journal of health, population, and nutrition, 2006
Based on several surveys during 1997-2005 and visits of a medical team to Eruani village, Laksham... more Based on several surveys during 1997-2005 and visits of a medical team to Eruani village, Laksham upazila, Comilla district, Bangladesh, the arsenic contamination situation and consequent clinical manifestations of arsenicosis among the villagers, including dermatology, neuropathy, and obstetric outcome, are reported here. Analysis of biological samples from patients and non-patients showed high body burden of arsenic. Even after eight years of known exposure, village children were still drinking arsenic-contaminated water, and many of them had arsenical skin lesions. There were social problems due to the symptoms of arsenicosis. The last survey established that there is a lack of proper awareness among villagers about different aspects of arsenic toxicity. The viability of different options of safe water, such as dugwells, deep tubewells, rainwater harvesting, and surface water with watershed management in the village, was studied. Finally, based on 19 years of field experience, it...
Research in Agriculture Livestock and Fisheries, 2020
In order to understand the existing status of aqua-medicines and chemicals in aquaculture activit... more In order to understand the existing status of aqua-medicines and chemicals in aquaculture activities present investigation was conducted from January to June 2017 in four upazilas of Bogura district namely, Bogura Sadar, Sherpur, Kahaloo and Shibganj. Questionnaire and focus group discussion were used for data collection. Among the latest aquachemicals, geotox, jv zeolite, mega plus, aquastar pond, acme's zeolite, zeo-fresh, aqua green, biomin pond life, aquakleen, megagio gold, and aqua boost were extensively used. Probiotics like profs, aqua photo, aqua gold, super biotic and pond care were used. The selected farmers used growth promoter such as saltose, panvit aqua, spa gelly, aqua boost and bio-pond, bio-grow, aqua pure, gasstrap, metrix, geo-rich bio-aqua 50 and aqua magic were used as toxic gas reducer. Approximately 11 trade names of antibiotics were marketed in the selected area. Their main active ingredients were chlortetracycline, oxytetracycline, amoxicillin, co-trimo...
Asian Journal of Medical and Biological Research, 2018
Effects of different chemotherapeutics were examined against experimentally infected stinging cat... more Effects of different chemotherapeutics were examined against experimentally infected stinging catfish Heteropneustes fossilis. Fish were collected from a fish market in Mymensingh, acclimatized for 7 days in laboratory condition from January to February, 2016 in aquaria at Fish Clinic of Bangladesh Agricultural University, Mymensingh, experimentally injured by using forceps and knife and waited seven days for the establishment of infection. Before starting chemotherapeutic trial, it was confirmed that the fish were infected with microorganisms by clinical diagnosis in laboratory condition. They showed hemorrhages and ulcerative lesions over the infected area. A total of 80 such experimentally infected stinging catfish having average body weight of 18 g were used for the experiment. Two chemotherapeutics: antibiotic, Eryvet (erythromycin thiocyanate INN, sulphadiazine (NaUSP) & trimithoprim BP) and antifungal, methylene blue were used in separate and combined treatment with three dif...
Asian Journal of Medical and Biological Research, 2018
The present study was conducted to investigate effects of stocking density on growth performances... more The present study was conducted to investigate effects of stocking density on growth performances of gold fish (Carassius auratus) in hapas. Experiment was conducted for a month with three treatments where three stocking densities were T1 (10 fry/hapa), T2 (15 fry/hapa) andT3 (20 fry/hapa) each having three replications which were selected randomly. In the present experiment hapa (3ft × 2ft × 2ft) with 1 mm mesh net was used. Gold fish fry having a mean body weight of 0.007 g were used in all treatments. Fishes were fed at the rate of 10% of their body weight containing 34.11% protein. Water quality parameters were monitored at 10 days interval and the ranges were –temperature 24.75 to 27.75 oC, dissolved oxygen 3.68 to 4.09 mg/L, pH 7.3 to 8.16, ammonia 0.3 to 1 mg/L, nitrite 0.01 to 0.03 mg/L, phosphate 0.6 to 1 mg/L and alkalinity 119 to 187 mg/L. At the growth performances were evaluated by comparing mean final body weight, specific growth rate and food conversion ratio. The pre...
Asian Journal of Medical and Biological Research, 2017
In order to understand the present status of hatcheries, questionnaire interview and participator... more In order to understand the present status of hatcheries, questionnaire interview and participatory rural appraisal tools were used in North-west Fisheries Extension Project (NFEP), Parbatipur during the period from July to December 2015. There are two hatcheries in NFEP, Parbatipur- a carp hatchery and a prawn hatchery. The production of spawn was around 611 kg in the year 2015. According to the target hatchery manager collected brood fish from rivers and other sources which he maintained in their brood stock ponds with proper management. The hatchery manager maintained proper age and weight of broods for spawning and followed the guideline of hatchery operation so that the quality of spawn and fry were good. It was found that the hatcheries produced fish seed of a variety of species such as Indian major carps, carpio, sarpunti, silver carp, grass carp, magur, shing as well as freshwater prawn. The hatchery production activities took place starting from February and continued up to ...
International Journal of Business and Management, 2011
This study examines the effect of characteristics of entrepreneur and characteristics of the firm... more This study examines the effect of characteristics of entrepreneur and characteristics of the firm on the business success of Small and Medium Enterprises in Bangladesh. The study is based on survey methodology through a questionnaire administered on the owners and employees of small firms. Data are analyzed using statistical package for social sciences (SPSS). Two hypotheses are proposed and tested. The characteristic of entrepreneur is found to be a significant factor for business success of SMEs in Bangladesh. However the firm characteristics are found not to be significant factor on the business success of SMEs in Bangladesh. The results of the analysis show that only one of the demographic factors which is duration of organization operated has significant effect toward business success of SMEs. SMEs that are operated longer period have been more successful in comparison to those who have been in operation for a shorter period. In addition to this, independent sample t-test shows that gender plays a significant role on business success of SMEs in Bangladesh. This study has implications for entrepreneurs and policy makers.
contain several IP-enabled devices, such as Earth observing equipment, that will be accessible by... more contain several IP-enabled devices, such as Earth observing equipment, that will be accessible by terrestrial users through the Internet. Mobility solutions, such as Mobile IPv6, can be used to handle the mobility of individual devices as the spacecraft moves around the Earth and handsover between ground stations. Mobility management of individual hosts, however, results in large amount of signaling in the bandwidth-limited satellite links and manageability problem as the number of devices increases. Network Mobility (NEMO) protocols can be used for mobility management of such a group of devices moving together. In this paper, we propose an architecture for application of NEMO in satellite networks, where the devices are connected using an on-board Local Area Network. In addition to providing continuous connectivity between onboard devices from Earth, the architecture enjoys several advantages, such as reduced signaling, increased manageability and conservation of satellite link ban...
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