3,116 research outputs found
High yield fusion in a Staged Z-pinch
We simulate fusion in a Z-pinch; where the load is a xenon-plasma liner
imploding onto a deuterium-tritium plasma target and the driver is a 2 MJ, 17
MA, 95 ns risetime pulser. The implosion system is modeled using the dynamic,
2-1/2 D, radiation-MHD code, MACH2. During implosion a shock forms in the Xe
liner, transporting current and energy radially inward. After collision with
the DT, a secondary shock forms pre-heating the DT to several hundred eV.
Adiabatic compression leads subsequently to a fusion burn, as the target is
surrounded by a flux-compressed, intense, azimuthal-magnetic field. The
intense-magnetic field confines fusion -particles, providing an
additional source of ion heating that leads to target ignition. The target
remains stable up to the time of ignition. Predictions are for a neutron yield
of and a thermonuclear energy of 84 MJ, that is, 42 times
greater than the initial, capacitor-stored energy
Kebiasaan Sarapan Pagi, Asupan Zat Gizi, Dan Status Gizi Murid Sdn Inpres 3 Tondo, Kota Palu
Kekurangan dan kelebihan gizi merupakan masalah gizi kronis dan akut yang mengancam anak usia sekolah dasar. Penelitian ini bertujuan untuk mengkaji kebiasaan sarapan pagi, asupan zat gizi, dan status gizi anak usia sekolah dasar. Jenis penelitian ini merupakan analitik observasional. Populasi penelitian adalah semua siswa kelas 4 SDN Inpres 3 Tondo yang berjumlah 40 murid. Teknik sampling adalah total sampling. Besar sampel yang berhasil dikumpulkan adalah 30 murid, dan 10 murid tidak hadir selama penelitian. Variabel penelitian yaitu kebiasaan sarapan pagi, asupan energi dan zat gizi, dan status gizi. Intrumen penelitian adalah form food recall 24 jam, food model, microtoise. Analisis data menggunakan aplikasi Nutrisurvey, WHO Antro Plus, dan SPSS. Hasil penelitian yaitu asupan gizi yang kurang dari AKG yaitu energi (80,0%), karbohidrat (76,6%), lemak (70,0%), dan protein (63,3%). Kebiasaan sarapan pagi sebesar 86,2%. Status gizi (IMT/Umur) kurus (13,3%), gizi lebih (20,0%) dan normal (66,7%). Kesimpulan yaitu murid telah memiliki kebiasaan sarapan pagi namun kualitas asupan gizinya masih kurang dari AKG dan murid memiliki masalah kekurangan dan kelebihan gizi
Faktor-faktor Yang Berhubungan Dengan Perilaku Makan Pada Remaja SMA Negeri 1 Palu
Perilaku makan adalah suatu keadaan yang menggambarkan perilaku seseorang terhadap tata krama makan, frekuensi makan, pola makan, kesukaan makan, dan pemilihan makanan. Konsumsi zat gizi yang tidak optimal berkaitan dengan kesehatan yang buruk. Bila konsumsi zat gizi selalu kurang dari kecukupan maka seseorang akan mengalami gizi kurang, sebaliknya jika konsumsi melebihi kecukupan akan menderita gizi lebih dan obesitas. Konsumsi zat gizi yang seimbang dan sesuai dengan kebutuhan akan membantu remaja mencapai pertumbuhan dan perkembangan yang optimal. Faktor-faktor yang mempengaruhi perilaku makan terbagi atas faktor eksternal dan internal. Penelitian ini bertujuan untuk mengetahui “Faktor-faktor yang berhubungan dengan perilaku makan pada remaja SMA Negeri 1 Palu”. Jenis penelitian survei analitik dengan pendekatan Cross Sectional Study. Populasi berjumlah 921 orang dan jumlah responden sebanyak 91 orang, menggunakan teknik proportional random sampling. Data penelitian ini diuji secara statistik dengan uji Chi-square. Hasil penelitian menunjukkan bahwa ada hubungan antara pendapatan orang tua (ρ= 0,004) dan pengetahuan gizi (ρ = 0,000) dengan perilaku makan. Dengan pendapatan yang diperoleh, keluarga dapat mengonsumsi makanan bergizi seimbang seperti tahu, tempe, ikan, sayur-sayuran yang harganya relatif terjangkau. Melalui pengetahuan gizi, responden menjadi tahu bahwa kesehatan berhubungan erat dengan makanan yang dikonsumsi sehari-hari. Dalam penelitian ini ditemukan pula tidak ada hubungan antara teman sebaya (ρ= 1,000) dengan perilaku makan. Mayoritas responden masih tinggal bersama orang tua sehingga orang tua masih memegang peranan penting dalam membentuk perilaku makan anak
Analgesic and anti-inflammatory properties of Argyreia argentea methanol extract in animal model
AbstractAnalgesic effect of Argyreia argentea methanol extract was assessed by acetic acid and formalin induced pain in Swiss albino mice. The extract at doses of 1.0, 1.5 and 2.0 g/kg produced an inhibition of 12.66, 16.04 & 23.60% in acetic acid induced pain and 19.3, 24.5 & 31.0% in formalin induced pain. The anti-inflammatory activity of the same extract was estimated volumetrically by measuring the mean increase in hind paw volume of carrageenan-induced Wistar albino rat with plethysmometer. Oral administration of the extract at doses of 1.0, 1.5 and 2.0 g/kg showed a time-dependent (1st, 2nd, 3rd and 4th hour) response in reduction of inflammation where the highest inhibition 25.0, 36.36 and 44.0%, were recorded at the 4th hour of treatment. Diclofenac sodium (40 mg/kg) has been administrated as a positive control in the inhibition of acetic acid and formalin induced pain as well as in carrageenan-induced paw edema. The results demonstrate that the extract could be a new and potential source of anti-inflammatory and analgesic drug
Performance Evaluation of Centralized Reconfigurable Transmitting Power Scheme in Wireless Network-on-chip
Network-on-chip (NoC) is an on-chip communication network that allows parallel communication among all cores to improve inter-core performance. Wireless NoC (WiNoC) introduces long-range and high bandwidth radio frequency (RF) interconnects that can possibly reduce the multi-hop communication of the planar metal interconnects in conventional NoC platforms. In WiNoC, RF transceivers account for a significant power consumption, particularly its transmitter, out of its total communication energy. This paper evaluates the energy and latency performance of a closed loop power management mechanism which enables transmitting power reconfiguration in WiNoC based on number of erroneous received packets. The scheme achieves significant energy savings with limited performance degradation and insignificant impact on throughput
Recognition of Radar-Based Deaf Sign Language Using Convolution Neural Network
The difficulties in the communication between the deaf and normal people through sign language can be overcome by implementing deep learning in the gestures signal recognition. The use of the Convolution Neural Network (CNN) in distinguishing radar-based gesture signals of deaf sign language has not been investigated. This paper describes the recognition of gestures of deaf sign language using radar and CNN. Six gestures of deaf sign language were acquired from normal subjects using a radar system and processed. Short-time Fourier Transform was performed to extract the gestures features and the classification was performed using CNN. The performance of CNN was examined using two types of inputs; segmented and non-segmented spectrograms. The accuracy of recognising the gestures is higher (92.31%) using the non-segmented spectrograms compared to the segmented spectrogram. The radar-based deaf sign language could be recognised accurately using CNN without segmentation
Recognition of Radar-Based Deaf Sign Language Using Convolution Neural Network
The difficulties in the communication between the deaf and normal people through sign language can be overcome by implementing deep learning in the gestures signal recognition. The use of the Convolution Neural Network (CNN) in distinguishing radar-based gesture signals of deaf sign language has not been investigated. This paper describes the recognition of gestures of deaf sign language using radar and CNN. Six gestures of deaf sign language were acquired from normal subjects using a radar system and processed. Short-time Fourier Transform was performed to extract the gestures features and the classification was performed using CNN. The performance of CNN was examined using two types of inputs; segmented and non-segmented spectrograms. The accuracy of recognising the gestures is higher (92.31%) using the non-segmented spectrograms compared to the segmented spectrogram. The radar-based deaf sign language could be recognised accurately using CNN without segmentation
CO2 methanation over mesoporous silica based catalyst: a comprehensive study
The abundance presence of CO2 released into the atmosphere has gained numerous consideration for an effective method to mitigate the CO2 build up and recycling the carbon resource. Among the catalytic reactions, the methanation of CO2 has been an indispensable reaction to transform toxic CO2 into methane which can be use as energy carrier or valuable chemical. The application of heterogeneous catalyst in CO2 methanation plays a significant role due to its effectiveness and stability which led to lower costs for large scale production. This article discussed the recent developments of silica based catalyst for CO2 methanation with emphasized on its physicochemical properties and catalytic performance. In summary, the nature of silica support material such as morphology, textural properties and nature of basicity has a great influence on its catalytic performance towards CO2 methanation
Trajna primjena fitoestrogena daidzeina poboljšava srednji arterijski tlak i vaskularnu funkciju u L-NAME štakora s povećanim krvnim tlakom.
The ‘silent killer’, hypertension, leads to heart disease, stroke, kidney failure and premature death. The phytoestrogen daidzein has been associated with vaso-protective action similar to oestrogen, with minimal side effects. To explore the vaso-protective activity of daidzein and also its effect on mean arterial pressure (MAP), daidzein was chronically administered in N-G-nitro-L-arginine methyl ester (L-NAME)-hypertensive male Wistar rats for 6 weeks. The male Wistar rats were divided into three groups, namely group-A (control), group-B (L-NAME-treated) and group-C (L-NAME+daidzein treated). After completion of 42 days (6 weeks) of daidzein treatment, MAP and vascular activity were observed in all the groups. Daidzein treatment of L-NAME hypertensive rats (group-C) for 6 weeks significantly decreased the MAP (144 mm Hg) as compared to untreated-L-NAME-hypertensive rats/group-B (173.2 mm Hg), indicating the blood-pressure lowering property of daidzein. Also daidzein significantly increased acetylcholine-induced maximal relaxations of the thoracic aorta isolated from daidzein-treated (Emax = 72.55 %) in comparison to untreated-L-NAME-hypertensive rats (Emax = 39.33 %). The results of the present study suggest that chronic administration of daidzein (0.5 mg/kg/day, s.c.) helps to lower blood pressure, as indicated by a decrease in MAP, and also shows vaso-protective action, as indicated by the improvement in ACh-induced relaxation.Hipertenzija kao „tihi ubojica“ dovodi do bolesti srca, moždanog udara, zatajivanja bubrega i prerane smrti. Fitoestrogen daidzein, slično kao i estrogen, djeluje zaštitno na krvne žile uz minimalne popratne učinke. S ciljem istraživanja zaštite krvnih žila, te učinka na krvni tlak (srednji arterijski tlak - SAT), daidzein je tijekom 6 tjedana bio primjenjivan Wistar štakorima s L-NAME - hipertenzijom. Štakori su bili podijeljeni u tri skupine: skupina A (kontrola), skupina B (L-NAME liječena) i skupina C (L-NAME + liječena daidzeinom). Nakon 42 dana liječenja u svim je skupinama bila analizirana funkcija krvnih žila i SAT. Liječenje štakora oboljelih od L-NAME hipertenzije (skupina C) daidzeinom dovelo je do signifikantnog sniženja srednjega arterijskog tlaka (144 mm Hg) u usporedbi s neliječenim oboljelim štakorima iz skupine B (173,2 mm Hg). Navedeno pokazuje učinke daidzeina na snižavanje krvnog tlaka. Osim toga, daidzein dovodi do signifikantnog povećanja maksimalne relaksacije torakalnog dijela aorte izazvane acetilkolinom. To pokazuju vrijednosti u skupini štakora liječenih daidzeinom (Emaks= 72,55 %), u usporedbi sa skupinom neliječenih štakora (Emaks= 39,33 %). Rezultati istraživanja potvrđuju da trajna primjena daidzeina (0,5 mg/kg/dan s.c.) pomaže snižavanju krvnog tlaka, na što upućuje njegova smanjena arterijska vrijednost. Osim toga, opisana primjena daidzeina djeluje zaštitno na krvne žile, jer poboljšava njihovu relaksaciju izazvanu acetilkolinom
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