Whispers in the Classroom

Part of the Volume on Digital Young, Innovation, and the UnexpectedOnline backchannel chat rooms offer the potential to transform classroom learning in unexpected and powerful ways. However, the specific ways in which they can influence teaching pedagogy and learning opportunities are less well understood. Activities in a backchannel may include the dissemination of ideas, knowledge building, asking and answering questions, engaging in critical discourse, and sharing information and resources. This chapter describes a backchannel chat room that has taken place over multiple years in a large university student community. It explores unforeseen and exciting opportunities, as well as possible limitations, for designing teaching and learning practices to leverage this communication medium. With a deeper understanding of the opportunities and limitations of the backchannel, educators and instructional designers could transform the classroom experience from a passive lecture model to one of active, collaborative, and engaged knowledge production

THE EFFECT OF USING CARTOON TOWARD SPEAKING ABILITY AT THE SECOND YEAR STUDENTS OF EKATAMA VOCATIONAL HIGH SCHOOL PEKANBARU

This thesis entitles” The Effectof Using Cartoon toward Speaking Ability at the Second Year of SMK EkatamaPekanbaru”. This research used two variables; variable X, as independent variable (The use of cartoon toward students’ speaking ability) and variable Y, as dependent variable (speaking ability) The subject of this research is the second year students of Ekatama Vocational High School, especially for hotel accomodation major. The researcher took the samples by using cluster random sampling technique. The research was conducted from October to November 2010. In collecting the data, the researcher used observation technique where the researcher used an observer to control how the researcher conducted the research and the researcher gave oral presentation test at the pretest and posttest. It was done to answer the formulation of the problem; how is the students’ speaking ability before being taught by using cartoon? How is the students’ speaking ability after being taught by using cartoon? Is there any significant effect of using cartoon toward speaking ability at the second year students of SMK EkatamaPekanbaru? In analyzing the data, the researcher used SPSS 16.0 version which compare the score of pretest and posttest. Based on the research finding, to is 3.077 is higher than t-table, at the level 5% = 2.04 or 1% = 2.76 ; (2.04 2.76). In other word, Mean of the posttest score is higher than Mean of the pretest score. It can be conclude that Ho is rejected and Ha is accepted. It means that there is a significant effect of using cartoon toward speaking ability at the second year students of SMK EkatamaPekanbaru

Direct numerical simulation of heat transfer from the stagnation region of a heated cylinder affected by an impinging wake

Copyright © 2011 Cambridge University Press.The effect of an incoming wake on the flow around and heat transfer from the stagnation region of a circular cylinder was studied using direct numerical simulations (DNSs). Four simulations were carried out at a Reynolds number (based on free-stream velocity and cylinder diameter D) of Re = 13200: one two-dimensional (baseline) simulation and three three-dimensional simulations. The three-dimensional simulations comprised a baseline simulation with a uniform incoming velocity field, a simulation in which realistic wake data - generated in a separate precursor DNS - were introduced at the inflow plane and, finally, a simulation in which the turbulent fluctuations were removed from the incoming wake in order to study the effect of the mean velocity deficit on the heat transfer in the stagnation region. In the simulation with realistic wake data, the incoming wake still exhibited the characteristic meandering behaviour of a near-wake. When approaching the regions immediately above and below the stagnation line of the cylinder, the vortical structures from the wake were found to be significantly stretched by the strongly accelerating wall-parallel (circumferential) flow into elongated vortex tubes that became increasingly aligned with the direction of flow. As the elongated streamwise vortical structures impinge on the stagnation region, on one side they transport cool fluid towards the heated cylinder, while on the other side hot fluid is transported away from the cylinder towards the free stream, thereby increasing the heat transfer. The DNS results are compared with various semi-empirical correlations for predicting the augmentation of heat transfer due to free-stream turbulence.German Research Foundatio

THE EFFECT OF USING CONVERSATIONAL DISCUSSION GROUPS STRATEGY ON READING COMPREHENSION IN DESCRIPTIVE TEXT OF THE EIGHT GRADE STUDENTS OF STATE JUNIOR HIGH SCHOOL 23 PEKANBARU

In this research the students still had problems in learning reading, For example, the students had lack of grammar mastery. The students had lack of vocabulary. The students were not able to clarify main idea and supporting detail. The students got low score in their reading. The objective of this research was to find out whether there was significant effect of using coversational discussion group strategy toward reading comprehension on descriptive text. The design of this research was quasi experimental design. The population of this research was the students of the second year at State Junior High School 23 Pekanbaru in 2013-2014 academic years. The total number of population was 256 students. The sample was taken by using cluster random sampling. The sample was class VIII H that consisted of 32 students as experimental group and class VIII G consisted of 32 students as control group. So the number of sample from two classes was 64 students. To analyze the data, the researcher adopted independent sample T-test formula by using SPSS 16 version. After analyzing the data, the researcher found that t0 >tt or 3.750 > 2.00. in conclusion, this research found that there is significant effect of using conversational discussion groups strategy toward reading comprehension in descriptive text of the second year students at state Junior High School 23Pekanbaru

Design of regulated velocity flow assurance device for petroleum industry

The petroleum industry faces problems in transportation of crude petroleum be- cause of the deposition of paraffins, hydrates and asphaltenes on the insides of the pipeline. These are conventionally removed using either chemical inhibitors or mechani- cal devices, called pigs, which travel through the pipeline and mechanically scrape away the deposits. These pigs are propelled by the pipeline product itself and hence travel at the same velocity as the product. Research has indicated that cleaning would be better if the pigs are traveling at a relatively constant velocity of around 70% of the product velocity. This research utilizes the concept of regulating the bypass flow velocity in order to maintain the pig velocity. The bypass flow is regulated by the control unit based on the feedback from the turbine flowmeter, which monitors the bypass flow. A motorized butterfly valve is used for actually controlling the bypass flow. In addition to cleaning, the proposed pig utilizes on-board electronics like accelerom- eter and pressure transducers to store the data gathered during the pig run. This data can then be analyzed and the condition of the pipeline predicted. Thus, this research addresses the problem of designing a pig to maintain a constant velocity in order to achieve better cleaning. It also helps gather elementary data that can be used to predict the internal conditions in the pipe

Efektivitas Penggunaan Metode Inquiry Berbantuan Media Robot KRPAI Terhadap Hasil Belajar Siswa Pada Mata Pelajaran Sensor dan Aktuator

Penelitian ini bertujuan untuk mengetahui: (1) efektivitas pembelajaran inquiry berbantuan media Robot KRPAI pada aspek kognitif, (2) efektivitas pembelajaran inquiry berbantuan media Robot KRPAI pada aspek afektif, (3) efektivitas pembelajaran inquiry berbantuan media Robot KRPAI pada aspek psikomotorik. Penelitian menggunakan metode eksperimen semu dengan desain penelitian nonequivalent control group design. Penelitian dilakukan pada siswa kelas XI pada Program Keahlian Teknik Elektronika di SMK N 2 Pengasih berjumlah 64 siswa. Kelas XI TELIN1 sebagai kelas eksperimen dan kelas XI TELIN2 sebagai kelas kontrol. Analisis data penelitian menggunakan teknik analisis deskriptif dan uji-t. Hasil penelitian disimpulkan bahwa: (1)pembelajaran berbasis inquiry berbantuan media Robot KRPAI lebih efektif pada aspek kognitif, kenaikan pretest ke posttest 16,47, kelas konvensional 6,54, (2)pembelajaran berbasis inquiry berbantuan media Robot KRPAI lebih efektif pada aspek afektif, rerata poin afektif kelas eksperimen 79,96, kelas kontrol 71,66; (3)pembelajaran berbasis inquiry berbantuan media Robot KRPAI lebih efektif pada aspek psikomotorik, rerata poin kelas eksperimen 77,21, kelas kontrol 70,99. Kata kunci: sensor dan aktuator, inquiry, robot KRPAI

Efektivitas Larva Black Soldier Fly (Hermetia Illucens) dalam Mereduksi Pakan Limbah Organik Sawi Putih dan Daun Singkong

Black Soldier Fly (BSF) is an insect that reduces organic waste by utilizing its larvae which will extract energy and nutrients from vegetable waste such as mustard and cassava leaves waste, fruits, food scraps, animal carcasses, and feces as food ingredients. This study aimed to see the effectiveness of BSF larvae in reducing feed organic waste of chicory and cassava leaves. The method used in this research is a laboratory and experimental scale experiment. The results of this study showed that the effectiveness of BSF larvae in reducing organic waste feed on cassava leaf waste samples was 57% for 1x3 feeding frequency, but decreased in 1x1 feeding frequency, which was 40%. While the percentage value of sample reduction by BSF larvae in chicory samples was 53% for 1x3 feeding frequency, but experienced a decrease in 1x1 feeding frequency, which was 38%. The effectiveness level of BSF larvae in reducing waste samples can be said to be effective at 1x3 feeding frequency

Notes on the Threats to the Endemic Bengal Mongoose from the Nalban Fisheries Complex in West Bengal, India

A lack of current data on Bengal mongoose Herpestes palustris in India inhibits the development of conservation strategies for this endemic wetland mammal. Structured interviews were conducted to assess the threats and examine the ecological importance of the Bengal mongoose in the Nalban fisheries complex in West Bengal for four months (May to August 2017). Over half of the interviewees perceived that the Bengal mongoose faces several threats and that its population has declined over the years. The respondents said that the removal of vegetation is the main reason for the declining mongoose numbers. The ecological importance of the mongoose was apparent among most interviewees. The results suggest that the endemic Bengal mongoose faces multiple anthropogenic hazards and emphasize the critical need for conservation efforts