7,499 research outputs found

    Spectrum and Franck-Condon factors of interacting suspended single-wall carbon nanotubes

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    A low energy theory of suspended carbon nanotube quantum dots in weak tunnelling coupling with metallic leads is presented. The focus is put on the dependence of the spectrum and the Franck-Condon factors on the geometry of the junction including several vibronic modes. The relative size and the relative position of the dot and its associated vibrons strongly influence the electromechanical properties of the system. A detailed analysis of the complete parameters space reveals different regimes: in the short vibron regime the tunnelling of an electron into the nanotube generates a plasmon-vibron excitation while in the long vibron regime polaron excitations dominate the scenario. The small, position dependent Franck-Condon couplings of the small vibron regime convert into uniform, large couplings in the long vibron regime. Selection rules for the excitations of the different plasmon-vibron modes via electronic tunnelling events are also derived.Comment: 23 pages, 8 figures, new version according to the published on

    Pertumbuhan dan Produksi Sorgum bicolor pada Kultur Fungi Mikoriza Arbuskula (FMA) dengan Sistem Fertigasi dan Fortifikasi Nutrisi Berbeda: Growth and Production of Sorghum bicolor in Arbuscular Mycorrhizal Fungi (AMF) Cultures with Different Fertigation and Nutrient Fortification Systems

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    Arbuscular mycorrhizal Fungi (AMF) is a microorganism that biologically affects plant enzymes and plant nutrients. AMF production development techniques need to be improved with the addition of nutritional fortification to produce quality AMF products. The research aimed was to cultivate AMF with complete fertilizer nutrition and different fertigation systems on Sorghum bicolor. The study used a 2 x 3 factorial randomized design with A factor: fertigation system (flat and terraced) and B factor: fertilizer nutrient levels (1000ppm, 2000ppm, 3000ppm). The results showed that the flat fertigation system had a significant different (p<0.05) on plant height, the number of leaves, stem diameter, and fresh biomass. However, in the high-level fertigation system, numbers of leaf, stem diameter, and fresh biomass did not have significant difference. There was no interaction between the fertigation and nutrient fortification systems. Sorghum panicle age started at 75 yields after planting (DAT). The relationship between percent infection and the number of spores showed a low level of correlation with R2 = 0.032. It can be concluded that the best fertigation system was a flat fertigation system for all nutrient fortifications, with the best average yield on 2000ppm nutrient fortification. Key words:        AMF, fertigation system, nutrition fortificatio

    Pengaruh Interval Pemotongan Dan Invasi Gulma Chromolaena Odorata Terhadap Produksi Dan Kualitas Rumput Brachiaria Humidicola

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    An excellent animal performance has to be supported by feed availability. Quality and quantity of forages are important factors. The existence of weeds significantly decreases rate of production and quality of herbage. Physically weed control by defoliation could be expected to sustain quality and production of herbage, and able to control weeds expansion. The aims of the study were to find the effect of interval defoliation of B. humidicola that was invaded by C. odorata and its effect on production, crude protein, phosphor, calcium contents of B. humidicola herbage, production and population dynamic of C. odorata. The treatments were nine different planting methods and different defoliation intervals, namely: B. humidicola was defoliated every 30 days without C. odorata (P1); B. humidicola was defoliated every 60 days without C. odorata (P2); B. humidicola was defoliated every 90 days without C. odorata (P3); B. humidicola were defoliated every 30 days, C. odorata were not defoliated (P4); B. humidicola were defoliated every 60 days, C. odorata were not defoliated (P5); B. humidicola were defoliated every 30 days, C. odorata were not defoliated (P6); B. humidicola and C. odorata were defoliated every 30 days (P7); B. humidicola and C. odorata, were defoliated every 60 days (P8); B. humidicola and C. odorata were defoliated every 90 days (P9). Two experiment designs namely Completely Randomized Block Design and Split Plot Design in Time were used in the field experiments. The result of the experiments showed that dry matter production of B. humidicola which were defoliated every 90 days were not significantly different than those defoliated every 60 days, but it was significantly higher than those defoliated every 30 days. Crude protein, phosphor, and calcium content of herbage which were defoliated every 30 days were significantly higher than those defoliated every 60 days and 90 days. Present and defoliation of C. odorata did not affect the herbage production, and phosphor content, but it decreased crude protein and calcium content of B. humidicola herbage

    Pengaruh Interval Pemotongan Rumput Brachiaria Humidicola (Rendle) Schweick terhadap Konsentrasi Amonia dan Asam Lemak Terbang (In Vitro)

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    The existence of weeds significantly depressed productivity and quality of herbage. Physically weed controlled by defoliation could be expected to sustain quality and production of herbage, and able to control weeds expansion. The aims of study were to find the effect of interval defoliations of B. humidicola that invited by C. odorata and its effect on concentration of ammonia and volatile fatty acid of B. humidicola herbage (in vitro). The experiment was carried out at Laboratory of Agrostology, Faculty of Animal Science Bogor Agricultural University. In vitro digestibility of herbage was analyzed at Ruminant Nutrition and Feed Chemistry Laboratory, Faculty of Animal Husbandry, Padjadjaran University. Split plot design in time was used in the field experiment. The treatments were nine different planting methods and different defoliation intervals. Defoliation times are divided on the first defoliation and the last defoliation. The results showed that concentration of both ammonia and volatile fatty acid of herbage, which defoliated every 60 days were found significantly higher than those defoliated every 30 days and 90 days. Present and defoliation of C. odorata didn\u27t give significant effect on the concentration of ammonia and volatile fatty acid of B. humidicola herbage

    Converting E-Learning Into M-Learning Application Using MMCD

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    E-Learning system has dominated the internet-based distance education for the past two decades. With the advance of mobile technology, the use of mobile device as m-learning platform has now becoming a new way of e-learning that deliver knowledge at any time any place. However, the limitation of mobile devices compared to computers give challenges to the developers in developing good m-learning applications. Aspects such as content design, navigation design and mobile HCI are critical and need extra attention during the development phase. MMCD is a set of development framework and methodology designed for multimedia mobile content development using Flash Lite technology. This research will present the MMCD framework and methodology for converting e-learning application into m-learning application to ease and guide the development process

    Does Age Affect the Response to Zinc Therapy for Diarrhoea in Bangladeshi Infants?

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    The benefit of zinc for the treatment of diarrhoea in a cluster-randomized trial of children, aged 3–59 months, living in rural Bangladesh was previously reported. Here, the benefits of zinc stratified by age—3–5 months, 6–11 months, and 12–59 months—are reported. Although the sample sizes in the stratified groups were too small to detect statistical significance in the 3–5-month and 6–11-month age-groups, the trends suggest that there may be a benefit of zinc for the treatment of diarrhoea on the duration of diarrhoea and on subsequent morbidity and mortality. Additional research is needed to better understand the effect of zinc for the treatment of diarrhoea among infants aged less than six months

    Botanical Composition, Grass Production, and Carrying Capacity of Pasture in Timor Tengah Selatan District

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    This study was conducted to analyze the botanical composition, grass production, carrying capacity, and potential production of nutrients in pasture located in Timor Tengah Selatan Regency. The experiment was conducted from February to July 2013, using field survey method. The botanical composition, grass production and carrying capacity on real condition were analyzed descriptively, while the grass production and carrying capacity based of cutting arrangement were analyzed by using randomized block factorial design with 3 altitude locations (Sub District of Mollo Utara with altitude of 1007 m above sea level; Sub District of Noebeba, 500 m ASL, and Sub District of Amanuban Selatan, 65 m ASL) x 2 cutting intervals (1 and 2 month) and 5 replications. The results showed that the grass type dominated the pasture in the Sub District of Mollo Utara, while legum type was more dominant in the pasture in the Sub Districts of Noebeba and Amanuban Selatan. The potential production of dry matter grass in Timor Tengah Selatan Regency based on real condition was 150 to 390 kg/ha/yr, this could accommodate 0.24 to 0.63 AU/ha/yr. The arrangement of cutting interval by 1 month in Mollo Utara and 2 months in Noebeba and Amanuban Selatan could increase (P<0.05) grass production and carrying capacity. The potential productions of grass nutrients were higher in Sub District of Mollo Utara, while potential production of grass dry matter was higher in Sub Districts of Noebeba and Amanuban Selatan. It was concluded that grass dry matter potential production and carrying capacity in Timor Tengah Selatan Regency were low. The arrangement of cutting interval could increase grass dry matter potential production, carrying capacity, nutrition production, and quality of nutrition.Key words: carrying capacity, grass, pasture, Timor Tengah Selata

    Perancangan Iklan Animasi 3d Batik Tie Dye di Surabaya Berbasis Online Guna Mengenalkan pada Masyarakat

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    Batik adalah salah satu hasil dari kerajinan Nusantara berbahan kain.Kekayaan dari batik celup (Tie Dye) warisan turun-menurun yang dilestarikan tersebut merupakan aset yang tak terhingga. Saat ini telah banyak gerakan yang ingin mengangkat batik salah satunya membranding, mengenalkan kembali, dan lain-lain.Tetapi yang sering ditemui kebanyakan batik-batik tulis dari beberapa jenis dan khas dari kota tertentu padahal di Surabaya terdapat Batik Tie Dye yang menarik dan patut untuk dikenalkan kepada masyarakat. Permasalahannya adalah kurangnya media promosi untuk Batik Tie Dye di Surabaya sehingga banyak konsumen kurang memiliki daya tarik untuk membeli. Tujuan dari penelitian ini adalah merancang Iklan animasi 3D berbasis Online pada Batik Tie Dye di Surabaya untuk mengenalkan kepada masyarakat dengan Media utama Iklan berbasis Online menggunakan youtube, dan media sosial (Instagram, Facebook, Line, Path ). Penelitian ini menggunakan metode kualitatif bertujuan untuk dapat menentukan cara mencari, mengumpulkan, mengelolah, dan menganalisis data dari hasil yang telah diteliti tersebut.mengumpulkan data diperoleh melalui hasil observasi, wawancara, dokumentasi. Agar dapat menginformasikan suatu produk baru dikalangan masyarakat perlu adanya suatu media yang di ciptakan untuk menyampaikan pesan. Untuk mengenalkan suatu produk, media yang cocok digunakan adalah media seperti video karena memiliki tujuan untuk menginformasikan dengan menggunakan animasi 3D ini agar diketahui khalayak luas lebih detail dan terlihat real. Keyword : Batik Tie Dye Surabaya, Iklan Animasi 3D, Berbasis Onlin

    Tc-99m NIDP and Tc-99m HMPAO labelled leukocyte scans in tuberculous spondylitis

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    A study was undertaken to assess the pattern of uptake on bone and labelled leukocyte scans in tuberculous spondylitis. Nine consecutive newly diagnosed cases were studied with Tc-99m MDP bone scans and Tc-99m HMPAO labelled leukocyte scans.The patients had basic laboratory investigations, plain chest and spine radiographs and computed tomography of the spine. Static images of bone scans were acquired at 3 hours and labelled leukocyte scans were acquired at 1,3 and 24 hours post-injection. A total of 11 spinal lesions were detected. Six bone scans were done demonstrating eight lesions and all showed abnormally increased activity.Labelled leukocyte scans were done in eight patients involving ten lesions and all except one showed photopaenic defects at the regions of interest.Both bone scan and leukocyte scan provided important information about the extent of the lesions and the combination of their pattern of uptake helped in the diagnosis of tuberculous spondylitis

    Concentration of Potassium, Magnesium, and Iron of Brachiaria Humidicola (Rendle Schweick) at Various Cultivation Methods and Defoliation Intervals

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    The existence of weeds significantly decreases the rate of production and quality of herbage. Physical weed control by defoliation could be expected to sustain quality and production of herbage, and is able to control weeds expansion. The aims of this study were to know the effect of defoliation intervals of B. humidicola that invited by C. odorata and its effect on potassium, magnesium and iron concentration. The experiment was conducted at the Laboratory of Agrostology, Faculty of Animal Science, Bogor Agricultural University. Chemical composition of forage was analyzed at the Chemistry Laboratory, Center of Soil and Agroclimatology Research. Split Plot Design in Time was used in the field experiment. The treatments were nine different planting methods and different defoliation intervals. Defoliation times were divided on the first defoliation and the last defoliation. The results of this experiment showed that potassium, magnesium and iron concentrations of herbage which were defoliated every 30 days was significantly higher than those defoliated every 60 days and 90 days. Potassium and iron concentrations at the last defoliation were higher than the first defoliation. The existence of C. odorata decreased magnesium and iron concentration of B. humidicola herbage, although they were defoliated together with grass defoliation
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