3,719 research outputs found

    Adaptive Light Control System

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    An adaptive traffic light system for crossroads is to be developed with the control being the data obtained through fixed cameras attached to the light system. The control itself is to be adaptive as there is no need for collecting data during the time when there is no traffic at all. Thus the problem is to collect data adaptively and control the light system accordingly. The idea, of course, is not to have people wait for unnecessary amount of time along the way, while there is no traffic across roads. Though looks rather reasonable, a very good adaptive strategy and an accompanying algorithm need to be developed. The study group is asked for such an algorithm

    Reproduction Control Of Male Oreochromis Niloticus (Nile Tilapia) Using Gossypium Herbaceum (Cotton) Root Bark Meals As Fertility Inhibitor

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    The study was carried out to control Tilapia population using Gossypium herbaceum root bark meal (GHRBM) as reproduction inhibitor. Gossypium herbaceum (Cotton) root bark meal was fed to male O. niloticus (31.38±0.67g). The root bark was added to a basal diet (35% crude protein) at 0, 5, 10, 15 and 20 g/kg diet. A total of 75 fishes were randomly distributed in triplicate into 15 plastic tanks (1x1x1m and 1.45 inches thick) at a stocking density of 5 fishes per 1m3. Groundwater of 400 litres volume was maintained throughout the period of experiment. The pH value was between 6.90 and 7.67, temperature ranged between 25.4 and 26.60C and dissolved oxygen concentration between 2.8 and 3.9 ml/l. The fish was fed at 4% body weight/day in two instalments at 09:00-09:30 hour and 17:00-17:30 hour. In fish fed 0g of GHRBM/kg diet, histological examination showed spermatocytes released into the lumen of the seminiferous tubules while in fish fed 5 g, 10 g, 15 g and 20 g GHRBM/kg diets, the sections showed eroded connective tissue, hydropic degeneration, disintegration in seminiferous lobule, damaged connective tissue and increased in interstitial cells. Except in the control treatment, it was observed that O. niloticus spermatozoa maintained normal morphology but low sperm count and low volume. Milt volume and milt count (P<0.05) decreased with increase in concentration of treatments used (from 0.5 to 0.1ml and 3.59 x109 to 0.33 x109 (Sperm/ml) respectively. Weight gained was highest in fish fed 10g GHRB/kg diet. It was observed that the feeding of Gossypium herbaceum root bark meals had no effect on water quality. Histological observations and milt analysis revealed that Gossypium herbaceum root bark may be effective as reproduction inhibitor in O. niloticus

    Physicochemical, toxicological and ecological analysis of Gökçekaya Dam Lake

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    Dams built to supply electricity, irrigation and fresh water, change the characteristics of the region they are located. The ecological, limnological characteristics and the quality of water in the dam reservoir deteriorate with time. In this study, the physicochemical, toxicological and ecological parameters of Gökçekaya Dam Lake’s water, which is situated on Sakarya River were examined. The selected area has different characteristics from the others. This lake is situated between two other dam lakes on Sakarya River. So the main water of the lake comes from Sakarya Dam. During the years 2005-2006, water samples were taken from the lake surface and depths in seasonal periods, and the physical, chemical and biological parameters were examined to determine the modifications in the quality of water. It was seen that while the quality had no certain differences, the level of the nutrients in the water was low. The different characteristics of the coming water enriched the varieties of algae. It was concluded thatthe structure of the water in Gökçekaya Dam Lake is mezotrophic

    Simple methanesulfonates are hydrolyzed by the sulfatase carbonic anhydrase activity.

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    This study was financed by Turkish Republic Prime Ministry State Planning Organization (DPT), (Project no: 2010K120440) for (MS). Work from Supuran lab was financed by an FP 7 EU grant (Metoxia project)

    Promoting Economic Development with Tourism in Rural Communities: Destination Image and Motivation to Return or Recommend

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    Improving tourism is one means Extension professionals and other community stakeholders can use to build rural economic resiliency. The research reported in this article evaluates what motivates tourists to visit and how they perceive of Wisconsin\u27s Kickapoo Valley as a destination. Data are drawn from surveys collected from out-of-town visitors. Results show the motivation to find excitement and adventure, the perception that the area is clean and hospitable, and whether visitors have been to the area more than once significantly affect their likelihood of returning to or recommending the area. Recommendations for how Extension professionals might use these findings are discussed

    Uji Keefektifan Ekstrak Daun Jarak Dan Daun Nimba Terhadap Intensitas Penyakit Antraknosa Pada Tanaman Cabai (Capsicum Annum L.)

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    Penyakit antraknosa yang disebabkan oleh Colletotrichum spp. merupakan salah satu kendala dalam USAha budidaya cabai. Kerugian akibat penyakit ini di lapangan dapat mencapai 65%. Salah satu alternatif pengendalian penyakit ini yaitu menggunakan fungisida nabati. Tanaman jarak dan nimba merupakan tanaman yang berpotensi sebagai fungisida nabati. Tanaman jarak dan nimba memiliki senyawa-senyawa aktif yang dapat membunuh jamur dan tidak toksik terhadap manusiadan hewan. Penelitian bertujuan untuk menguji keefektifan ekstrak daun jarak dan daun nimba terhadap intensitas penyakit antraknosa pada tanaman cabai (Capsicum annum L.). Penelitian dilaksanakan di Laboratorium Lapang Terpadu Fakultas Pertanian Universitas Lampung pada bulan Juni sampai September 2013. Penelitian disusun dengan menggunakan Rancangan Acak Kelompok (RAK) dengan 5 perlakuan dan 5 ulangan sehingga didapatkan 25 satuan percobaan, setiap satuan percobaan terdiri dari 2 tanaman cabai. Lima perlakuan tersebut adalah kontrol (F 0 ), ekstrak daun jarak fraksi alkohol 10% (F 1 ), ekstrak daun jarak fraksi Etil asetat 10% (F 2 ), ekstrak daun nimba fraksi alkohol 90% (F 3 ) dan perlakuan fungisida pembanding (F 4 ). Data yang diperoleh kemudian dianalisis menggunakan sidik ragam yang dilanjutkan dengan uji BNT pada taraf nyata 5%. Hasil penelitian menunjukkan bahwa ekstrak daun jarak fraksi alkohol 10%, ekstrak daun jarak fraksi etil asetat 10% dan ekstrak daun nimba fraksi alkohol 90% dapat menekan intensitas penyakit antraknosa pada tanaman cabai, ekstrak daun jarak fraksi alkohol 10% dan fraksi etil asetat 10% lebih baik dalam menekan intensitas penyakit antraknosa pada cabai dibandingkan dengan ekstrak daun nimba fraski alkohol 90% dan fungisida sintetik, dan kemampuan ekstrak daun nimba fraksi alkohol 90% tidak berbeda dengan kemampuan dari fungisida sintetik dalam menekan intensitas penyakit antraknosa pada tanaman cabai
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