Peningkatan Kemampuan Berbicara Menggunakan Metode Bermain Peran pada Pembelajaran Bahasa Indonesia Kelas V SD

The research aim to increase student speaking abillity with use character play method in V class, elementry school 36 Pontianak City. The method is used descriptive method. The research form is used class action research. This research is doing in 2 siclus with result on first observation its found 19 people (67,86%) is not clear, and just 9 people (32,14%) is clear form 28 students. On implementation siclus I its even increase seen from amount of student is not clear II people (36,67%) and the clear score is 19 people (63,33%). And on siclus II its even increase again student have a not clear score 1 people (3,33%) and clear score 29 people (96,67%) from 30 student. So can be conclusion that used character play method can increase student speaking abillity in V class elementry school 36 Pontianak City

Implementasi Moving Average Filter Pada Mikrokontroler Sebagai Peredam Noise Sensor Piezo Elektrik Untuk Mendeteksi Gelombang Seismik (Gempa Bumi)

Getaran akibat gempa bumi akan mengakibatkan adanya frekuensi gelombang seismik denganfrekuensi rendah (0Hz - 20Hz), untuk mendeteksi keberadaan frekuensi gelombang seismiktersebut dapat menggunakan sensor piezo elektrik. Piezo elektrik adalah sebuah sensor seismikyang mempunyai getaran gempa beramplitudo rendah dan sangat mudah terkontaminasi noisesehingga dibutuhkan filter untuk meredam sinyal noise tersebut. Moving Average (MA) filteradalah suatu metode yang sederhana dan berguna untuk menapis derau acak yang terdapat padaderau asli. MA filter bekerja dengan cara meratakan sejumlah titik tertentu dari isyarat masukanuntuk menghasilkan tiap titik dari isyarat luaran. Gelombang seismic (getaran buatan) padapenelitian ini adalah dengan memberikan amplitudo sensor piezo PVDF antara 3mm, 5mm, 7mm,9mm dan 12mm pada frekuensi 2 Hz (konstan). Sensor piezo mendeteksi kekuatan getaran buatandengan menggunakan Moving Average Filter yang menghasilkan nilai SNR (signal to noiseratio) lebih kecil dibandingkan tidak menggunakan MAF Nilai PGA (peak groundacceleration) dalam satuan grafitasi akan tinggi pada saat sinyal amplitude getaran yangdiberikan juga tinggi (PGA = 0,01G pada saat amplitude getaran 3mm dan 1,43G pada saatamplitude getaran 12 mm)

Pengembangan Sistem Kontrol Traksi Mobil Elektrik Berbasis Rekonstruksi Keadaan Kecepatan Model Roda

In this paper the development of electric vehicle traction control based on state of speed reconstruction of vehicle model that has the same acceleration condition between tire and chassis is studied. Vehicle is accelerated if the friction force takes place between tire and road. However, the traction force decreases even tends to zero on slippery road and torque input produces a large slip. Evidently, tire slip can be reduced by decreasing the applied torque to the tire. So the basic principle of the proposed method here compares the real vehicle tire speed condition with the model to determine the torque in order to reduce the slip. Tire speed is controlled in order to follow the reference value that is calculated from the model. Tire torque input then can be controlled by applying the feedback that is obtained from the difference value of speed between model and real tire. Implementation of this method on a real vehicle shows that the control method effectively controls the tire speed of vehicle to follow the reference and reducing the slip. From the experiment the control system performance in reducing slip has the result of 9.8% for maximum overshoot, 3.1 second for rise time, and 8 second for settling time

Metal Reduction at Cold Temperatures by Shewanella Isolates from Various Marine Environments

Members of the genus Shewanella capable of reducing metals and forming minerals under cold-temperature conditions were isolated from 3 distinct marine habitats (the coast of Wash- ington State, the Puget Sound, and an iron-rich microbial mat off Hawaii). Cultures of microorgan- isms were isolated at 8°C on nutrient agar medium prepared in artificial seawater. Isolates in this study could use a wide variety of electron acceptors such as oxygen, nitrate, and metals, and reduce various metals coupled to the oxidation of several organic acids, glucose or hydrogen at temperatures down to 0°C. Akaganeite was reduced to either magnetite or siderite, depending on the test condi- tions. The geochemical profiles at the sample sites from which these strains were isolated spanned a temperature range of 1.8 to 11°C, and all showed active oxygen and nitrate reduction as well as metal reduction. This confirms previous reports that sediment microorganisms participating in biogeo- chemical cycles remain active at low temperatures

Quantitative analysis of single bacterial chemotaxis using a linear concentration gradient microchannel

A microfluidic device to quantify bacterial chemotaxis has been proposed, which generates a linear concentration gradient of chemoattractant in the main channel only by convective and molecular diffusion, and which enables the bacteria to enter the main channel in a single file by hydrodynamic focusing technique. The trajectory of each bacterium in response to the concentration gradient of chemoattractant is photographed by a CCD camera and its velocity is acquired by a simple PTV (Particle Tracking Velocimetry) algorithm. An advantage of this assay is to measure the velocity of a single bacterium and to quantify the degree of chemotaxis by analyzing the frequency of velocities concurrently. Thus, the parameter characterizing the motility of wild-type Escherichia coli strain RP437 in response to various concentration gradients of L-aspartate is obtained in such a manner that the degree of bacterial chemotaxis is quantified on the basis of a newly proposed Migration Index

Genomic Sequence Analysis of Granulovirus Isolated from the Tobacco Cutworm, Spodoptera litura

Background: Spodoptera litura is a noctuid moth that is considered an agricultural pest. The larvae feed on a wide range of plants and have been recorded on plants from 40 plant families (mostly dicotyledons). It is a major pest of many crops. To better understand Spodoptera litura granulovirus (SpliGV), the nucleotide sequence of the SpliGV DNA genome was determined and analyzed. Methodology/Principal Findings: The genome of the SpliGV was completely sequenced. The nucleotide sequence of the SpliGV genome was 124,121 bp long with 61.2 % A+T content and contained 133 putative open reading frames (ORFs) of 150 or more nucleotides. The 133 putative ORFs covered 86.3 % of the genome. Among these, 31 ORFs were conserved in most completely sequenced baculovirus genomes, 38 were granulovirus (GV)-specific, and 64 were present in some nucleopolyhedroviruses (NPVs) and/or GVs. We proved that 9 of the ORFs were SpliGV specific. Conclusions/Significance: The genome of SpliGV is 124,121 bp in size. One hundred thirty-three ORFs that putatively encode proteins of 50 or more amino acid residues with minimal overlap were determined. No chitinase or cathepsin genes, which are involved in the liquefaction of the infected host, were found in the SpliGV genome, explaining why SpliGVinfected insects do not degrade in a typical manner. The DNA photolyase gene was first found in the genus Granulovirus. When phylogenic relationships were analyzed, the SpliGV was most closely related to Trichoplusia ni granulovirus (TnGV

Possibility and design of resonant terahertz emitters based on nanoscale strained silicon plasma wave transistors with enhanced mobility

In this paper, we report the possibility of silicon (Si) plasma wave transistor (PWT) as a resonant terahertz (THz) emitter based on the theoretical analysis focusing on the strained Si with enhanced mobility. Under asymmetric boundary conditions for plasma wave instability, the amplitude of plasma wave in FET channel increases and this plasma wave increment provides the basis of the electromagnetic (EM) wave emission from FET. Because this instability is controlled by manipulation of plasma wave velocity (s) and electron drift velocity (v0), we propose the design window based on s-v0 plot which determines whether the device operates as the resonant THz emitters considering all the required physical conditions. It is expected from the proposed design window that strained Si PWT down to 10nm gate length with enhanced channel mobility of 500cm2??V -1??-1 can operate as a resonant emitter in THz frequency range.close1