scholarly journals PENGEMBANGAN KIT PRAKTIKUM ELEKTRONIKA DASAR II BERBASIS SIMULATOR PROTEUS UNTUK MENINGKATKAN KEMAMPUAN MAHASISWA DALAM PEMECAHAN MASALAH

2021 ◽  
Vol 4 (1) ◽  
pp. 9-16
Author(s):  
Suwardi Suwardi ◽  
Erik Ayatullah ◽  
Haidul Haidul
Keyword(s):  
Problem Solving ◽  
Low Frequency ◽  
Field Testing ◽  
Data Retrieval ◽  
Active Filters ◽  
Common Source ◽  
Initial Product ◽  
Observation Methods ◽  
Circuit Output ◽  
Expert Validation

ABSTRAK Penelitian ini bertujuan untuk mengembangkan kit praktikum Elektronika Dasar II berbasis simulator Proteus untuk meningkatkan kemampuan pemecahan masalah mahasiswa.Hasil observasi dalam prapenelitian menunjukkan bahwa mahasiswa kesulitan merangkai komponen elektronika, kekurangan waktu praktikum, dan kesulitan dalam mendapatkan data.Untuk mengatasi permasalahan  ini dilakukan pengembangan kit praktikum Elektronika Dasar IIberbasis menggunakan simulator Proteus. Melalui kit praktikum mahasiswa fokus pada proses pengambilan data dan menganalisis sinyal keluaran rangkaian elektronika.Sedangkan simulator Proteus dapat membantu dalam mengamati gejala-gejala yang tidak dapat diamati langsung dan sebagai data pembanding. Penelitian ini merupakan jenis penelitian dan pengembangan dengan tahapan adalah analisis kebutuhan, pengembangan produk awal, validasi ahli, uji lapangan dan revisi produk. Penelitian ini dilakukan di Laboratorium Fisika FMIPA Universitas Bengkulu  semester ganjil 2018/2019dengan subyek penelitian ini adalah 22 mahasiswa. Pengumpulan data dilakukan menggunakan metode observasi dan kuesioner yang dianalisis secara deskriptif kuantitatif. Hasil penelitian menunjukkan bahwa kit praktikum yang berhasil dikembangkan terdiri dari delapan percobaan yaitu penguat common drain, common source, emitor ditanahkan, pushpull, respon frekuensi rendah, inverting dan non inverting, integrator dan diferensiator, dan filter aktif. Kelayakan kit praktikum sebagai media pembelajaran di laboratorium berdasarkan validasi ahli sebesar 82,50% (sangat layak) dan berdasarkan pengguna sebesar 82, 64% (sangat layak). Kata kunci: kit praktikum elektronika dasar II, simulator proteus, praktikum berbasis masalah  ABSTRACT This study aims to develop a Basic Electronics II practicum kit based on the Proteus simulator to improve students' problem solving abilities. The results of observations in the pre-study showed that students had difficulty assembling electronic components, lack of practicum time, and difficulties in obtaining data. To overcome this problem, the development of Basic Electronics II based practicum kit using the Proteus simulator is carried out. Through the practicum kit students focus on the process of data retrieval and analyzing the electronic circuit output signal. Whereas the Proteus simulator can help in observing symptoms that cannot be observed directly and as comparative data. This research is a type of research and development with stages are needs analysis, initial product development, expert validation, field testing and product revision. This research was conducted in the Physics Laboratory of the University of Bengkulu FMIPA odd semester 2018/2019 with the subjects of this study were 22 students. Data collection was carried out using observation methods and questionnaires which were analyzed quantitatively descriptively. The results showed that the practicum kit that was successfully developed consisted of eight experiments namely common drain amplifier, common source, ground emitter, pushpull, low frequency response, inverting and non-inverting, integrators and differentiators, and active filters. The feasibility of the practicum kit as a learning media in a laboratory based on expert validation is 82.50% (very feasible) and based on the user is 82, 64% (very feasible). Keywords: basic electronics II practicum kit, proteus simulator, problem solving laboratory

scholarly journals Development of Class VI Elementary School Thematic Teaching Materials Based Local Wisdom

2020 ◽  
Vol 4 (3) ◽  
pp. 296
Author(s):  
Retno Wulandari ◽  
Sri Utaminingsih ◽  
Mohammad Kanzunnudin
Keyword(s):  
Elementary School ◽  
Research Method ◽  
Field Testing ◽  
Validation Process ◽  
Teaching Materials ◽  
Initial Product ◽  
School Class ◽  
Research Implementation ◽  
Materials Used ◽  
Expert Validation

There are no teaching materials used by teachers that can foster moral values in students, so it is necessary to have learning materials that introduce the culture or local wisdom of each region. The purpose of this study was to determine feasibility of thematic teaching materials for elementary school class VI theme 1 based on local wisdom. This research method referred to the theory of Borg and Gall, using seven steps or research implementation, namely potentials and problems, research planning, developing initial product, field testing, revision, validation, and final improvement. The data collection techniques used were observation, interview, and questionnaire techniques. The analysis used in this research is quantitative and qualitative analysis including learning observation and validation of teaching material products. Sources of data in this study were grade VI students and teachers. From the material expert validation process obtained an average result of 3,41 with percentage of 85% and very good category. The validation from linguists obtained 90% result with an average 3,6 and very good category. For the result of teacher responses obtained an average result of 3,85 total score 3466 with very good category. For the result of the response students, the average result was 3,94 and the total score was 568 in the very good category. Based on the result of the validation and reinforced by the result of the responses of student and teachers, the thematic teaching materials based on local wisdom of Rembang were declared suitable for use in the learning process.

scholarly journals Pengembangan Praktikum Fisika Materi Hukum Kekekalan Momentum Menggunakan Aplikasi Video Tracker

2019 ◽  
Vol 1 (1) ◽  
pp. 37
Author(s):  
Khotijah Khotijah ◽  
Arsini Arsini ◽  
Sheilla Rully Anggita
Keyword(s):  
Product Development ◽  
Field Testing ◽  
Momentum Conservation ◽  
Test Results ◽  
Initial Product ◽  
Student Responses ◽  
Average Value ◽  
Validation Test ◽  
The Media ◽  
Expert Validation

This study aims to determine the feasibility and the effectiveness of using a video tracker application for practicum of physics 1 on momentum conservation. This is included in research and development type. Stages carried out in this study include: 1) define, is done by giving questionnaires and interviews, 2) design, includes media selection, format selection and produce the initial product design, 3) development, includes product development and material expert validation assessment, media experts and linguists and limited field testing. The validation test results obtained that the media is feasible to use with a percentage of 88% based on material experts with very good categories, 85% based on media experts with very good categories, and 78% based on linguists with good categories. The effectiveness of media is shown by high average value of the experimental class of 84,06 compared to the control class of 70,97. Student responses to the use of products are categorized very well with a percentage of 89%.

Pengembangan Bahan Ajar Matematika Bisnis Berbasis Komputer Untuk Mahasiswa Jurusan Akuntansi Politeknik Negeri Bali

Epigram ◽  
2019 ◽  
Vol 16 (2) ◽  
pp. 99-110
Author(s):  
I Made Wijana ◽  
Anak Agung Putri Suardani ◽  
I Gede Made Karma
Keyword(s):  
Small Group ◽  
Mathematics Teaching ◽  
Needs Analysis ◽  
Average Score ◽  
Teaching Materials ◽  
Initial Product ◽  
Large Group ◽  
Computer Based ◽  
Large Groups ◽  
Expert Validation

This research aims to produce prototype of computer-based business mathematics teaching materials to improve student achievement of Accounting Department, Politeknik Negeri Bali (PNB). In this research, to reach the target of teaching materials of computer-based business mathematics, the development using Borg and Gall method with some modifications into five steps: needs analysis and curriculum majoring in accounting, initial product development, education expert validation, small group trial , and large group trials. Trial of small group and large group by involving first semester student of Diploma IV Managerial Accounting Study Program, Accounting Department, PNB. Based on curriculum analysis and needs analysis, teaching materials are developed in the form of modules with Microsoft Excel application and the result of the initial product are five modules with topics of Formula, Linear and Non Linear Functions, Interest Calculation, Annuity, and Linear Programming. Education expert validation using five aspects resulted in an average score of 4.13 (good). Trial of the teaching materials by measuring student perceptions using three aspects for small groups resulted in an average score of 3.81 (good) and for large groups resulted in an average score of 4.23 (good). Furthermore, results of evaluation in large groups indicate a significant increase in mean of student scores from before and after using computer-based Business Mathematics teaching materials 

scholarly journals Association Between Brain Activation and Functional Connectivity

2018 ◽  
Vol 29 (5) ◽  
pp. 1984-1996 ◽  
Author(s):  
Dardo Tomasi ◽  
Nora D Volkow
Keyword(s):  
Functional Connectivity ◽  
Brain Activity ◽  
Low Frequency ◽  
Brain Activation ◽  
Blood Oxygen Level Dependent ◽  
Common Source ◽  
Functional Connectivity Density ◽  
Density Mapping ◽  
Human Connectome Project ◽  
Bold Responses

Abstract The origin of the “resting-state” brain activity recorded with functional magnetic resonance imaging (fMRI) is still uncertain. Here we provide evidence for the neurovascular origins of the amplitude of the low-frequency fluctuations (ALFF) and the local functional connectivity density (lFCD) by comparing them with task-induced blood-oxygen level dependent (BOLD) responses, which are considered a proxy for neuronal activation. Using fMRI data for 2 different tasks (Relational and Social) collected by the Human Connectome Project in 426 healthy adults, we show that ALFF and lFCD have linear associations with the BOLD response. This association was significantly attenuated by a novel task signal regression (TSR) procedure, indicating that task performance enhances lFCD and ALFF in activated regions. We also show that lFCD predicts BOLD activation patterns, as was recently shown for other functional connectivity metrics, which corroborates that resting functional connectivity architecture impacts brain activation responses. Thus, our findings indicate a common source for BOLD responses, ALFF and lFCD, which is consistent with the neurovascular origin of local hemodynamic synchrony presumably reflecting coordinated fluctuations in neuronal activity. This study also supports the development of task-evoked functional connectivity density mapping.

scholarly journals DEVELOPMENT OF TEACHING MATERIALS FOR SASAK ALUS LANGUAGE AS CULTURAL PRESERVATION AND LEARNING RESOURCES

2019 ◽  
Vol 7 (5) ◽  
pp. 556-563 ◽  
Author(s):  
Zul Anwar ◽  
Basuki Wibawa ◽  
Nurdin Ibrahim
Keyword(s):  
Elementary School ◽  
Field Testing ◽  
Cultural Preservation ◽  
Instructional Materials ◽  
Dissemination And Implementation ◽  
Learning Resources ◽  
Teaching Materials ◽  
Library Research ◽  
Content Expert ◽  
Expert Validation

Purpose: This study aims to develop language teaching materials as a learning resource for fourth-grade students in elementary school. Methodology: The approach used in this study is library research that is operationalized by the development method. The procedure of development research according to Gall and Borg consists of ten steps, namely; (1) research and information collecting), (2) planning, (3) developing preliminary form of product), (4) preliminary field testing, (5) main product revision, (6) main field testing, (7) operational product revision, (8) operational field testing, (9) final product revision, (10) dissemination and implementation. Main Findings: The results showed that the instructional materials developed were suitable to be used as learning resources with the results of content expert validation 84.5%, media expert validation 77.2%, instructional design expert validation 83.2%. The results of trials one to one by learner 80.8%, 85.4% small group, and 85.8% field trial. Implications: Based on the results of the test it was concluded that the teaching materials developed were suitable to be used as learning resources. The products of this study can be used to apply the concept of resource-based learning and improve the quality of local subject learning in the Sasak Alus language in elementary school.

scholarly journals Developing Learning Model of Basic Throw In Physical and Health Education Through Games for Second Grade Students In Central Semarang District

2020 ◽  
Vol 5 (1) ◽  
pp. 7
Author(s):  
Selvi Atesya Kesumawati ◽  
Husni Fahritsani ◽  
Saipul Ambri Damanik
Keyword(s):  
Primary School ◽  
Field Testing ◽  
Primary Students ◽  
Development Model ◽  
Second Grade ◽  
Primary School Students ◽  
School Students ◽  
Initial Product ◽  
Second Grade Students ◽  
Physical And Health Education

This study aims to produce a model of basic throw through games which is useful for teachers in giving lessons to primary school students. This development model is a procedural development, because it is in accordance with the problem to be solved and the objectives to be achieved. The procedure used includes five main stages, namely: 1) conducting an analysis of the product you want to develop, 2) making an initial product of a model of basic throw through games for primary students, 3) expert validation, 4) field testing, and 5) product revision. The data are qualitative and quantitative data, while the instruments are list question and observations. Data analysis uses percentages to analyze and subject ratings to assess the feasibility, quality and acceptability of the product. The research study in a model of basic throw through games for primary students along with the development of infrastructure, regulations, and playing techniques. The model for developing basic throw through this game is proven to be feasible, of quality, then acceptable for developing the concept skills of game motion and increasing the physical fitness of primary school students, because respondents when playing ball show that the average category is quite good, meaning that this development model is average - can be demonstrated.

scholarly journals Differences in chloride gradients allow for three distinct types of synaptic modulation by endocannabinoids

2016 ◽  
Vol 116 (2) ◽  
pp. 619-628 ◽  
Author(s):  
Yanqing Wang ◽  
Brian D. Burrell
Keyword(s):  
Neural Circuit ◽  
Critical Role ◽  
Low Frequency ◽  
Inhibitory Synapses ◽  
Primary Role ◽  
Synaptic Modulation ◽  
Hirudo Verbana ◽  
Frequency Stimulation ◽  
Circuit Output

Endocannabinoids can elicit persistent depression of excitatory and inhibitory synapses, reducing or enhancing (disinhibiting) neural circuit output, respectively. In this study, we examined whether differences in Cl−gradients can regulate which synapses undergo endocannabinoid-mediated synaptic depression vs. disinhibition using the well-characterized central nervous system (CNS) of the medicinal leech, Hirudo verbana. Exogenous application of endocannabinoids or capsaicin elicits potentiation of pressure (P) cell synapses and depression of both polymodal (Npoly) and mechanical (Nmech) nociceptive synapses. In P synapses, blocking Cl−export prevented endocannabinoid-mediated potentiation, consistent with a disinhibition process that has been indicated by previous experiments. In Nmechneurons, which are depolarized by GABA due to an elevated Cl−equilibrium potentials (ECl), endocannabinoid-mediated depression was prevented by blocking Cl−import, indicating that this decrease in synaptic signaling was due to depression of excitatory GABAergic input (disexcitation). Npolyneurons are also depolarized by GABA, but endocannabinoids elicit depression in these synapses directly and were only weakly affected by disruption of Cl−import. Consequently, the primary role of elevated EClmay be to protect Npolysynapses from disinhibition. All forms of endocannabinoid-mediated plasticity required activation of transient potential receptor vanilloid (TRPV) channels. Endocannabinoid/TRPV-dependent synaptic plasticity could also be elicited by distinct patterns of afferent stimulation with low-frequency stimulation (LFS) eliciting endocannabinoid-mediated depression of Npolysynapses and high-frequency stimulus (HFS) eliciting endocannabinoid-mediated potentiation of P synapses and depression of Nmechsynapses. These findings demonstrate a critical role of differences in Cl−gradients between neurons in determining the sign, potentiation vs. depression, of synaptic modulation under normal physiological conditions.

scholarly journals The dependence of Pi2 waveforms on periodic velocity enhancements within bursty bulk flows

2011 ◽  
Vol 29 (3) ◽  
pp. 493-509 ◽  
Author(s):  
K. R. Murphy ◽  
I. J. Rae ◽  
I. R. Mann ◽  
A. P. Walsh ◽  
D. K. Milling ◽  
...  
Keyword(s):  
Causal Relation ◽  
Low Frequency ◽  
Temporal Variations ◽  
Magnetic Activity ◽  
Common Source ◽  
Magnetometer Array ◽  
Frequency Domains ◽  
Bulk Plasma ◽  
Bursty Bulk Flows

Abstract. Pi2s are a category of Ultra Low Frequency (ULF) waves associated with the onset of magnetic substorms. Recent work has suggested that the deceleration of bulk plasma flows in the central plasmasheet, known as bursty bulk flows (BBFs), are able to directly-drive Pi2 oscillations. Some of these studies have further shown evidence that there is a one-to-one correlation between Pi2 magnetic waveforms observed on the ground and periodic peaks in flow velocity within the BBF, known as flow bursts. Utilising a favourable conjunction between the Geotail spacecraft and the Canadian Array for Real-time Investigations of Magnetic Activity (CARISMA) magnetometer array on 31 May 1998, we examine the causality of the link between BBF flow bursts and Pi2 waveforms. Using a series of analytical tests in both the time and frequency domains, we find that while the Pi2 and BBF waveforms are very similar, the ground response for this event occurs prior to the observed flow enhancements in the magnetotail. We conclude that during this specific case study the temporal variations of the flow bursts within the BBF are not directly-driving the observed ground-based Pi2 waveforms, despite the fact that a visual inspection of both time-series might initially suggest that there is a causal relationship. We postulate that rather than there being a direct causal relation, the similar waveforms observed in both Pi2s and BBFs may result from temporal variations in a common source for both the BBFs and the Pi2s, such as magnetic reconnection in the tail, this source modulating both the Pi2 and BBF at the same frequency.

scholarly journals AVBH: Asymmetric Learning to Hash with Variable Bit Encoding

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Yanduo Ren ◽  
Jiangbo Qian ◽  
Yihong Dong ◽  
Yu Xin ◽  
Huahui Chen
Keyword(s):  
Low Frequency ◽  
Large Data ◽  
Data Retrieval ◽  
Query Point ◽  
Compact Binary ◽  
Hash Code ◽  
Asymmetric Learning ◽  
Learning To Hash ◽  
Public Datasets ◽  
The Cost

Nearest neighbour search (NNS) is the core of large data retrieval. Learning to hash is an effective way to solve the problems by representing high-dimensional data into a compact binary code. However, existing learning to hash methods needs long bit encoding to ensure the accuracy of query, and long bit encoding brings large cost of storage, which severely restricts the long bit encoding in the application of big data. An asymmetric learning to hash with variable bit encoding algorithm (AVBH) is proposed to solve the problem. The AVBH hash algorithm uses two types of hash mapping functions to encode the dataset and the query set into different length bits. For datasets, the hash code frequencies of datasets after random Fourier feature encoding are statistically analysed. The hash code with high frequency is compressed into a longer coding representation, and the hash code with low frequency is compressed into a shorter coding representation. The query point is quantized to a long bit hash code and compared with the same length cascade concatenated data point. Experiments on public datasets show that the proposed algorithm effectively reduces the cost of storage and improves the accuracy of query.

Curvilinear Behavior of Base Layer Moduli from Deflection and Seismic Methods

2000 ◽  
Vol 1716 (1) ◽  
pp. 55-63
Author(s):  
Kamal Tawfiq ◽  
John Sobanjo ◽  
Jamshid Armaghani
Keyword(s):  
Surface Deformation ◽  
Low Frequency ◽  
Field Testing ◽  
Base Layer ◽  
Falling Weight Deflectometer ◽  
Seismic Methods ◽  
Extensive Field ◽  
Curvilinear Relationships ◽  
Falling Weight ◽  
Surface Deflections

The reality of curvilinear relationships of stiffness versus deformation is usually neglected when moduli values from seismic methods are compared with those of deflection methods. On the basis of extensive field testing, results showed that moduli values for the base layers from deflection methods did not conform to those of seismic methods. Deflection testing techniques were signified by the falling weight deflectometer (FWD) and the Dynaflect methods. Seismic testing was carried out by use of the seismic pavement analyzer (SPA) method. The SPA test results yielded moduli values higher than those obtained from the deflection methods. Utilizing pavement parameters obtained from the SPA data, researchers determined surface deflections by use of frequency response functions of signals from the two groups of sensors used in the testing setup. Because of the types of hammers in the SPA testing, two different deflection basins were obtained at each testing point. Comparison of surface deflections from these methods indicated that deflection amplitudes from the FWD method were about 100 times higher than those obtained from the high-frequency hammer of the SPA. At certain pavement sections, deflections from the Dynaflect method were comparable to those obtained with the SPA low-frequency hammer. Accordingly, curvilinear relationships between surface deformation versus stiffness values were derived. These relationships can be used to determine moduli values at all surface deflections, including those from service loads.

Sign in / Sign up

Export Citation Format

Share Document