bluuebunny/crossref_metadata_2025 huggingface dataset:
Optimasi topologi pada komponen penampan mesin printer 3dimensi dengan metode generative desain
Authors: Utama D.W.
Published: January 2018

The process of developing a product is currently demanded faster implementation, where the use of CAD can help speed up the process of product development. The commonly CAD software used is parametric method software, where the user can change the shape of the model by changing the parameters accordingly, after which, the model can be directly analyzed using finite element analysis method. If the design is needed to be changed, then the designer should change the parameters in  CAD module and then performed FEA analysis again. This process is often done repeatedly to produce a product model that meets the needs and criteria specified. Generative design method is a method that uses a series of design criteria and design limitations. In this paper the generative design method is a feature in CAD where topology optimization is applied in creating the design of the tray table. The tray table is the main component of the 3D printer that has design criteria such as static load of 17.912N and geometric boundaries. The generative design used to optimize the weight of the component is reshaped again according to the criteria and aesthetics of the form. The CAD model is retested with the FEA method to ensure safe design. The results show that the best optimazation is at 55% weight reduction with the von mises stress 2.12 MPa and the deflection about 0.129mm.
Modified atmosphere storage (mas) buah pisang
Authors: Libyawati Wina , Eka Lesmana I Gede , Raynold A. , Agustian Hafidan , Mahardhika L.
Published: January 2018

Healthy life style based on natural food consumption, has been implemented by the society to increase health quality. Minimally processed technology is used to slow down food decay time in the storage room. Minimally processed techology is consist of Controlled Atmosphere Storage (CAS), Modified Atmosphere Storage (MAS), Freeze Driying, and blansir. MAS is food storage technology by conditioning the air composition (especially oxygen level). Banana is an object of MAS implementation, due to its all session fruit and shorter life time. Previous MAS studies used long bean as the object and managed to improve the life time until 15 days.The purpose of this study is to implement MAS to lengthen banana life time. MAS design use Ulrich Eppinger method. Simulation of Turbulance Kinetic Energy (TKE) in the sparger and MAS installation use ANSYS 16.2. The experimental to test sparger and installation is conducted for 6 hours for the sparger and 24 hours for the installation. Afterward the correlation between parameter is calculated by using least square method. The outcome of this  research is MAS for banana in order to be used by SME with capacity of 4.77 m3, mixture time is 24 hours, TKE number in the sparger is 582.6448 J/kg, TKE number in the installation is 715.6 J/kg, oxygen level in the sparger is 5.7%, oxygen level in MAS installation is 8.5%, glucose of banana located in the storage room is 9.5%, and banana life time able to achiave 14 days.
Sampul Dinamika Teknik Mesin Desember 2017
Authors: Dinamika Dinamika
Published: January 2018

Sampul Dinamika Teknik Mesin Desember 2017
Pengaruh variasi besar lubang dan tebal plat terhadap boiling time, lama nyala dan laju pembakaran pada desain kompor biomassa tongkol jagung
Authors: Joniarta I Wayan , Wijana Made
Published: January 2018

The biomass stove is designed to utilize fuel chunks.  The main principle of the stove design is to utilize the outside air coming into the stove through the hole on the underside. The air coming into the stove is divided becoming primary air and secondary air. The primary air enters from under the burning sleeve to the fuel, while the secondary air enters from the top hole of the burning sleeve and burns the combustion gas containing fuel-burning substances. In this study, the fuel used was corncob with a diameter of 3-4 cm, a length of 6-7 cm, and moisture contents ranging from 14%-16%. The stove used consists of 8 variations of the design model. Independent variables in this study were plate thickness, outer air hole diameter, secondary air hole diameter, and primary air hole diameter. While the dependent variables investigated were boiling time and flaming duration. The fastest boiling time was 2.07 minutes achieved from the stove designed no 3. Meanwhile, The longest flaming duration was 13.24 minutes shown by the stove no 6. There for the fastest burning rate was 0,00708 kg/s was sown  stove designed no 6, and the latest burning rate  was 0,00474 kg/s  achieved from the stove no 6. This different result is influenced by the density of the corncobe, the density of the biomass fuel  will be quikly burned and very fast oxidation.
Sampaul Dinamika Teknik Mesin Januari 2018
Authors: Dinamika Dinamika
Published: January 2018

Sampaul Dinamika Teknik Mesin January 2018
IMPLEMENTASI TEOREMA COLLAGE UNTUK MENDESAIN SISTEM FUNGSI ITERASI (SFI): STUDI AWAL MENDESAIN SFI MOTIF SONGKET LOMBOK
Authors: Afifurrahman Afifurrahman
Published: January 2018

Abstrak: Geometri fraktal merupakan cabang matematika yang memfokuskan kajiannya pada objek-objek fraktal. SFI yaitu teknik yang dapat digunakan untuk memodelkan objek fraktal. Tulisan ini memaparkan bagaimana mengaplikasikan teorema Collage untuk mendesain SFI suatu himpunan K ÃÂ yang memilikiÃÂ  sifat self-similarity. Mendesain SFI suatu himpunan K ÃÂ berarti mencari sejumlah berhingga pemetaan kontraktif berupa transformasi affine:ÃÂ dengan ÃÂ sedemikian sehingga ÃÂ untuk n=1,2,Ã¢â¬Â¦,N. Keenam parameter pada persamaan di atas disebut sebagai kode SFI. Penelitian ini bertujuan untuk merancang suatu algoritma berdasarkan ide dari teorema Collage dalam menentukan kode SFI yang akan digunakan untuk memvisualisasikan atraktor dari objek fraktal menggunakan bahasa pemrograman. Algoritma yang telah disusun selanjutnya diterapkan untuk memperoleh SFI motif songket Lombok dan diperoleh hasil sebagai berikut:dengan faktor kontraktivitas s = 0.70434.Kata Kunci: Teorema Collage; Sifat Self-Similarity; Transformasi Affine; Algoritma; SFI; Atraktor.ÃÂ Abstract: Fractal geometry is the branch of mathematics that focus its studies on fractals. Iterated Function Systems (IFS) acts as a technique to generate fractal models. This article presents how to implement the Collage Theorem to design IFS ofÃÂ  K ÃÂ which hold self-similarity property. Designing IFS of K ÃÂ means that finding the finite contractive mapping i.e. affine transformation: ÃÂ where ÃÂ ÃÂ such that ÃÂ for n=1,2,Ã¢â¬Â¦,N. The six parameters on the equation above are called IFS codes. The aim of the study is constructing the algorithm based on the Collage theorem to determine the IFS codes which are used to visualize the attractor of the fractal objects through programming language. The Algorithm is implemented to obtain the IFS of SongketÃ¢â¬â¢s texture of Lombok and the result is given below:with a contractivity factor s = 0.70434.Keywords: Collage Theorem; Self-Similarity; Affine Transformation; Algorithm; IFS; Attractor.
HUBUNGAN VARIASI HARIAN NILAI TURBULENCE KINETIC ENERGY DAN FLUKS PANAS DI WILAYAH KOTA BANDUNG
Authors: Setyawan Fani
Published: January 2018

Abstrak : Lapisan Batas Meteorologi merupakan suatu lapisan yang berada di bagian terbawah dari Troposfer. Salah satu fenomena yang terjadi di lapisan batas ini adalah Turbulensi yang memiliki durasi singkat namun memiliki pengaruh yang besar terhadap pembentukan cuaca di Troposfer. Dalam aktifitas Turbulensi terdapat nilai Turbulence Kinetic Energy (TKE) dan mempengaruhi transfer panas atau Fluks Panas di atmosfer. Observasi meteorologi menggunakan Sonic Anemometer dapat digunakan untuk menghitung nilai-nilai tersebut. Komponen pengamatan yang dihasilkan merupakan variabel-variabel yang digunakan untuk menghitung nilai TKE dan Fluks Panas, yaitu komponen u, v, w, dan T. Dari hasil pengamatan yang dilakukan di wilayah kota Bandung (studi kasus tanggal 26 september 2014), didapatkan variasi angin harian yang berhembus dari arah Barat hingga Utara dengan kecepatan rata-rata 4 knots. Namun pada siang hari, angin berhembus secara bergantian dari arah Barat dan dari arah Timur. Siklus harian dari nilai TKE menunjukkan adanya variasi dengan nilai yang besar saat matahari mulai muncul dan berakhir sebelum tengah hari. Sedangkan untuk siklus harian dari Fluks Panas menunjukkan fluktuasi yang signifikan saat tengah hari hingga matahari terbenam. Hal ini menunjukkan bahwa proses konveksi saat pagi hari dipengaruhi oleh Turbulence Kinetic Energy dan nilai Fluks Panas mempengaruhi proses konveksi setelah nilai TKE turun hingga matahari terbenam.Kata Kunci : Lapisan batas, Turbulence Kinetic Energy (TKE), Fluks PanasAbstrack : Meteorological Boundary Layer is a layer at lowest part of troposphere. One of phenomena at this layer is Turbulence which has a short duration but has a major influence in the weather at the Troposphere. Turbulence activities consists of a Turbulence Kinetic Energy (TKE) value and affect heat flux at the atmosphere. Meteorological observation using Sonic Anemometer can be used to calculate these values. The variables used to calculate TKE value and Heat Flux, the variable u, v, w, and T, obtained from these observation. From the observations at Bandung region (case study was september, 26, 2014), found variations in the daily wind blows from the West and North with an average speed of 4 knots. But during the day, wind blows alternately from the West and from the East. The daily cycle from TKE value indicate a variation with a great value when the sun began and endeed before noon. As for the daily cycle of heat flux show significant fluctuations at noon to sunset. This suggests that the process of convection during the morning influenced by Turbulence Kinetic Energy and value of Heat Flux affects the convection process after TKE value decline until the sunset.Keywords : Boundary layer, Turbulence Kinetic Energy (TKE), Heat Flux
PENERAPAN MODEL PEMBELAJARAN KOOPERATIF TIPE TPS (THINK PAIR SHARE) UNTUK MENINGKATKAN AKTIVITAS BELAJAR IPA BIOLOGI KELAS VIII.5 SMPN 4 MATARAM
Authors: Mahyaeny Mahyaeny
Published: January 2018

Abstrak: Penelitian ini bertujuan untuk menerapkan model pembelajaran kooperatif tipe TPS (Think Pair Share) untuk meningkatkan aktivitas belajar IPA Biologi siswa Kelas VIII.5 SMPN 4 Mataram. Penelitian dilaksanakan secara kolaboratif dalam bentuk penelitian tindakan. Penelitian ini melibatkan siswa-siswi sebanyak 37 orang. Penelitian dilakukan dalam 3 (tiga) siklus, masing-masing siklus terdiri dari tahap perencanaan, pelaksanaan tindakan, observasi evaluasi, dan refleksi. Keberhasilan dalam penelitian ini tercapai apabila rata-rata skor aktivitas siswa selama proses pembelajaran di kelas 4,00 (sangat memuaskan) dan sebagai tambahan skor aktivitas guru 4,00 (sangat memuaskan). Hasil penelitian menunjukkan hasil belajar siswa pada siklus I rata-rata 2,41 (kurang memuaskan). Sedangkan skor untuk kegiatan guru 3,00 (memuaskan). Siklus II diperoleh data aktivitas belajar siswa 3,01 ( memuaskan) sedangkan kegiatan guru 3,43 (memuaskan).pada siklus III menunjukkan peningkatan dibandingkan dengan siklus sebelumnya. Nilai rata-rata skor aktivitas belajar siswa 4,03 (sangat memuaskan) demikian juga untuk aktivitas guru 4,28 (sangat memuaskan). Kesimpulan dari penelitian ini adalah penerapan model pembelajaran kooperatif tipe TPS (Think Pair Share) dapat meningkatkan aktivitas belajar siswa pada mata pelajaran IPA Biologi kelas VIII.5 SMPN 4 Mataram.Kata Kunci: TPS (Think Pair Share, Aktivitas Belajar.Abstract: This study aims to implement cooperative learning model TPS (Think Pair Share) to increase learning activities of student Class VIII.5 junior high school 4 Mataram. The study involved 37 students. The study was conducted in three (3) cycles, each cycle consisting of the stages of planning, action, observationÃÂ  evaluation, and reflection. ÃÂ The research success indicator showed when the average score of student activity during the learning process in the classroom is 4.00 and score activity of teacher is 4.00. The results show student learning activity in the first cycle an average of 2.41 while scores for teacher activity was 3.00. In the cycle II, students learning activity reached 3.01 while the teachers' activity was 3.43. In the third cycle showed an increase compared to the previous cycle. The average value of student learning activity score was 4.03ÃÂ  as well as for the activities of teachers was 4.28. The conclusion from this study is the implementation of cooperative learning model TPS (Think Pair Share) increase learning activities of student in science subjects biology class VIII.5 junior high school 4 Mataram.Keywords: TPS (Think Pair Share), Activity Learning
PERBEDAAN PENGARUH MODEL PEMBELAJARAN KOOPERATIF TIPE STAD DAN TIPE JIGSAW TERHADAP HASIL BELAJAR FISIKA DITINJAU DARI MOTIVASI BELAJAR SISWA
Authors: Doyan Aris , Gunada Wayan , - Susilawati , Adriani Ida AYu Desy
Published: January 2018

The research is aimed to finding difference of effect the implementation of cooperative learning model STAD and Jigsaw type on the result of physic learning, difference of effect the students whose achievement motivation on result of physic learning and interaction of effect between the learning model implementation and the achievement motivation on the result of physic learning. This type of research is quasi experimental with Factorial Design of 2x2. The population in this research is all Class VIII SMPN 12 Mataram with used technique cluster random sampling. There are two samples that are class VIII C as an experiment class I and class VIII D as experiment class II. The experiment class I used the treatment STAD cooperative learning model and the experiment class II used the treatment Jigsaw cooperative learning. Analysis technique using analysis of variance (ANOVA) two way different cells. Based on by calculation hypothesis testing obtained that, FA hint (6,37) > Ftable (4,02) then Ho1 rejected, FB hint (12,37) > Ftable (4,02) then Ho2 rejected,, FAB hint (0,96) < Ftable (4,02) then Ho3accepted. With significant level 0,05 obtained that there is a difference of effect the implementation of cooperative learning model STAD and Jigsaw type on the result of physic learning, there is a difference of effect the students whose achievement is high and low motivation on the result of physic learning and there is no interaction between of cooperative learning model STAD and Jigsaw type with achievement motivation towards of physics learning.
PENGARUH PEMBELAJARAN MENGGUNAKKAN LKS INKUIRI TERINTEGRASI GENERIK SAINS (ITGS) TERHADAP HASIL BELAJAR FISIKA DITINJAU DARI MOTIVASI BERPRESTASI SISWA DI SMAN 1 AIKMEL
Authors: Nasir Muhammad , Harjono Ahmad , Sridana Nyoman
Published: January 2018

The aim of this study was to evaluate difference of influence between inquiry integrated by science generic (IIBSG) student’s work sheet and experiment verification (EV) student’s work sheet learning on students’s phisycs learning outcomes, difference of influence between high and low achievement motivation level on students’s phisycs learning outcomes, and interaction between student’s work sheet and achievement motivation on students’s phisycs learning outcomes. Method of this research was experimental method with a 2x2 faktorial design. Data analyzed with two-way ANOVA. The conclution of this study include there was difference of influence between IIBSG student’s work sheet and EV student’s work sheet  learning on students’s phisycs learning outcomes, there was difference influence between high and low achievement motivation level on students’s phisycs learning outcomes, and there was no interaction between student’s work sheet learning and achievement motivation on students’s phisycs learning outcomes.Keywords: IIBSG student’s work sheet, achievement motivation, and student’s phisycs learning outcomes
PENGARUH EKSTRAK ETANOL DAUN JAMBU AIR (SYZYGIUM AQUEUM) TERHADAP BAKTERI ISOLAT KLINIS
Authors: Hariyati Titi , Jekti Dwi Soelistya Dyah , Andayani Yayuk
Published: January 2018

Syzygium aqueum plant of the family Myrtaceae is native of Malaysia and Indonesia and is known as the water rose. The active compound is useful as an antibacterial. This study aimed to determine the effects of ethanol extracts of guava leaves (S. aqueum) as an antimicrobial against clinical isolates bacteria in vitro. The design used in experiment was a Completely Randomized Design (CRD). Data were analyzed using the Kruskal-Wallis test. Results of statistical analysis using SPSS 20 for windows indicated that the ethanol extract of guava leaves has a significant (P<0,05) effect in inhibiting the growth of clinical isolates bacteria. MIC (Minimum Inhibition Concentration) of ethanol extracts for each bacterium can not be determined because the guava leaf extract was very dark. The MBC (Minimum Bacterisidal Concentration) of ethanol extract of guava leaf  for both S. aureus and S. dysenteriae was 20%.  The MBC of the extract for E. coli, S. thypi, V. cholerae was 25%, where as for B. cereus was at concentration of 50%. It can be concluded that guava leaf has highly potential as a source of antimicrobial agent.Keywords:Antibacteria, Guava Leaf, Clinical Isolates Bacteria, Ethanol Extract
PERTUMBUHAN KALUS DAUN MELON (Cucumis melo) VARIETAS MAI 119 DENGAN PEMBERIAN BAP (BENZYL AMINO PURINE) DAN 2,4-D (2,4 DICHLOROPHENOXYACETIC ACID)
Authors: Toharah Nining Intan , Jekti Dwi Soelistya Dyah , Zulkifli Lalu
Published: January 2018

This study aims to determine the concentration of growth regulators BAP and   2,4-D which have the highest effect in stimulating the formation of callus melon plants (Cucumis melo) Mai 119 variety. Completely randomized design (CRD) was used in this research. Media used on callus induction was MS medium with addition of several concentration of BAP  (0 mg/L, 1 mg/L, 2 mg/L, 3 mg/L) and 2,4-D (0 mg/L, 1 mg/L, 2 mg/L, 3 mg/L) either alone or in a combination of both. Parameters measured were the time appearing of callus, callus diameter, callus texture, and callus color. Anova followed by Tukey's test was used to the analyse of time appearing of callus. Data of callus diameter was analyzed using Kruskal Wallis test followed by Mann-Whitney test. In the analysis of parameter related to the callus texture and callus color, descriptive test were used. The results showed that there were differences in the effect of growth regulators on the callus formation. The fastest callus induction and the largest diameter of callus were obtained on media with concentration of 2 mg/L BAP and 3 mg/L BAP.Keywords: BAP (benzyl amino purine), 2,4-D (2,4-dichlorophenoxyacetic acid), callus induction, melon (Cucumis melo) varieties Mai 119
PENGARUH MODEL PEMBELAJARAN INKUIRI TERBIMBING TERHADAP PENGUASAAN KONSEP SAINS DITINJAU DARI KEMAMPUAN AWAL SISWA
Authors: - Susilawati , - Susilawati , Sridana Nyoman
Published: January 2018

This study aims to find out: (1) the differences in science concept mastery of students who take guided inquiry learning model with conventional learning, (2) the differences in science concept mastery of students that prior knowledge high and low prior knowledge. This method of research is an quasi-experimental with factorial 2x2 analysis design. The subject of this study was ten class of 8th grade student in SMP 10 Mataram 2014/2015. Two class was chosen as sample using cluster random sampling technique, one classes as experimental group and one classes of control group. The research instrument is science mastery concept made by teacher. Data were analyzed using ANCOVA to find the effect of learning model and prior knowledge to science concept mastery. Analyses were performed using SPSS version 20 for Windows. Based on the analysis can be concluded that: 1) There are differences in science concept mastery of students who take guided inquiry learning model compared to conventional learning. 2) There is no difference in concept science mastery of students who have high and low prior knowledge of students.
PENGARUH MODEL PEMBELAJARAN KOOPERATIF DENGAN PENDEKATAN PROBLEM POSING DITINJAU DARI PENGETAHUAN AWAL TERHADAP PENGUASAAN KONSEP FISIKA SISWA SMK
Authors: Jannah Siti Nurdatul , Doyan Aris , Harjono Ahmad
Published: January 2018

This study aims to determine the effect of cooperative learning through problem posing approach to the mastery of concepts of students in terms of prior knowledge. The method used is a quasi-experimental method with 2x2 factorial study design. The study population was 163 students of class XI SMKN 9 Mataram scattered in 5 classes. These samples included 55 students, divided into two classes by cluster of random sampling technique. The research instrument is a test mastery of concepts and problem solving skills test given at the beginning and end of the study. The data was analyzed by Manova two ways. The results showed that (1) students learn to use cooperative learning model with problem posing approach was significantly different in the aspect of mastery of concepts than students who study with learning cooperative model only, (2) students who have high prior knowledge different significantly in aspects of mastery of concept compared students who have low prior knowledge, (3) there was an interaction effect between learning model with prior knowledge of the mastery of concepts students. Keywors: Cooperative Learning Model, Problem Posing, Prior Knowledge, Concepts Mastery
PENGARUH MODEL PEMBELAJARAN KOOPERATIF NHT DAN STAD TERHADAP HASIL BELAJAR PENGETAHUAN BIOLOGI SISWA SMA NEGERI 2 GERUNG
Authors: Aryana I. G. M. R. , Idrus Agil Al , Harjono Ahmad
Published: January 2018

This study aims to determine differences of knowledge biology student learning outcomes between groups of students who receive NHT cooperative learning model and STAD cooperative learning model treatment for digestive system. This research was conducted at SMAN 2 Gerung in class of XI. This study is a quasi-experimental research using modified of Type Between Group Design with Pre-posttest design. The number of population was 44 students that using simple random sampling in order to obtain two classes of experiments. Data were analyzed using inferential statistical analysis and hypothesis was tested using t-test analysis with SPSS version 20 for Windows. The results showed: First, there was no significant difference about knowledge learning outcome between the group the of students using NHT cooperative learning model and group of students using STAD cooperative learning model in the substance of Food, Food Healthy Menu, Structure and Function of Cells Network of Human Digestive System, Network Structure System of Ruminant Digestion, and Digestive Disorders Bioprocess Systems that gained tcount ≤ ttable (p> 0.05). Second, a group of students using STAD cooperative learning model has an average value of knowledge learning outcome that is significantly higher than the group of students that use NHT cooperative learning model for Body Mass Index (BMI) and Basal Metallic Rate (BMR) that gained value ttable < tcount (p ≤ 0.05).Keyword: NHT cooperative learning model, STAD cooperative learning model, student’s knowledge learning outcome of biology
PENGARUH MODEL PEMBELAJARAN DISCOVERY DENGAN PENDEKATAN SAINTIFIK DAN KETERAMPILAN PROSES TERHADAP HASIL BELAJAR FISIKA PESERTA DIDIK
Authors: Hilmi Nurul , Harjono Ahmad , Soeprianto Harry
Published: January 2018

This study aims to determine 1) Effect of discovery learning model with a scientific approach (PDPS) on learning outcomes physics learners; 2) The effect of process skills to the learning outcomes of physics students and 3) Effect of discovery learning model with a scientific approach interaction and process skills to the learning outcomes of students. This study is a quasi-experimental design using pretest-posttes nonequivalent group design with a 2 x 2 factorial design. Data were analyzed using analysis of variance with SPSS 21. The result showed 1) Model PDPS affect the Physics learning outcomes of learners with sig (0,000 ) <α (0.05), 2) process  skills  affects the outcome of the  learning physics learners with sig (0.001) <α (0.05) and 3) There is a learning model interaction effect (PDPs-Expository) and process skills to physics learning outcomes with sig (0,000) <α (0.05)Keywords: Discovery learning model with a scientific approach,  process skills, learning outcomes
PENGEMBANGAN INSTRUMEN MISKONSEPSI KIMIA PADA KONSEP STRUKTUR ATOM
Authors: - Mursadam , - Wildan , Ramdani Agus
Published: January 2018

The research is aimed producing the instrument of chemistry misconception at the atom structure concept as the instrument for categorizing the student’s misconception. This research is designed as research and development in according with Borg and Gall. The validity test of the instruments include validity of cuntructions, validity of content, validity of psychometrics and the legibility of the instrument. The research result showed that each individual students are categorized as fair with the average of 60,38%, the misconception of students is categorized a also fair in concept of electronic configuration (53,53%), in sub-skin (55,54%), in energy level (59,92%) and in those that is categorized high is in the concept of orbital (66,66%).Keywords: Instrument of chemistry conception, Atom structure
PENGEMBANGAN PERANGKAT PENILAIAN KINERJA (PERFORMANCE ASSESSMENT) BERBASIS KURIKULUM 2013 PADA PEMBELAJARAN KIMIA KELAS XI
Authors: - Diartha , - Wildan , - Muntari
Published: January 2018

This development research aimed to produce performance assessment instrument on chemistry learning for XI grade, descibe for characteristics, and validity tests. This research development used Dick and Carey’s model. The products consists of acid-base proved into worksheet, evaluation of indicators, direction of usage, sheet of observation, rubric of assessment, assessment of conversion, and value of recapitulation. Validation’s data of Aiken were 0,60 for unit one, unit two for 0,60, and 0,66 for unite three means valid. The data of experiment were 84% for suitability, 87% for simplicity, and 84% for usefullness. Application’ data for suitability, simplicity, and usefullness were 84%, 86%, and 84% respectively. Upper validity correlation table within 5% of significant level and reability inter-raters were 0,76 for unit one and 0,75 for unit two. Application of assessment’s instrument were positively responded by students. Therefore, instrument of assessment in 2013 curriculum-based stated applicable to be implemented in learning process.Keywords: Performance assessment-instrument, Applicable, Chemistry  learning
POTENSI ANTIOKSIDAN HASIL FRAKSINASI EKSTRAK ETANOL Phaseolus vulgaris L
Authors: Utomo Vincentius Y , Andayani Yayuk , Gunawan Erin Ryantin
Published: January 2018

A research on the antioxidant potential of ethanol extract Phaseolus vulgaris L. fractination. The aims study to know fraction had been antioxidant potential and dominant compound at extract fraction. Antioxidant potential fraction is polar fraction and its IC50 is 158 ppm. A dominant compound at nonpolar, semipolar dan polar fraction is phenolic compound. Polar fraction had a greatest percentage phenolic compound (42%).
Effects of gamma irradiation on red blood cells at different storage period: A comparative study
Authors: Yousuf Rabeya , Mobin Mohd Herman , Subramaniam Thirumeni , Leong Chooi Fun
Published: January 2018

Objectives: The objective of this study was to explore the effect of gamma irradiation on the haematological and biochemical parameters of the allogeneic red blood cells units at different storage duration.Methods: A prospective comparative study was conducted at the Blood Bank unit, Department of Diagnostic Laboratory Services of Universiti Kebangsaan Malaysia Medical Centre (UKMMC) in year 2013. Total 36 allogeneic red blood cell units were selected by simple random sampling method and divided into two groups, 18 units in each group based on the storage period into i) up to 14 days and ii) >14 days to expiry. Pre and post irradiation samples were taken immediately before and after irradiation of the units to analyse for the haematological parameters such as plasma Hb level, percent red cell haemolysis, haemoglobin per unit blood (Hb/unit), haematocrit (HCT), red cell indices such as mean corpuscular volume (MCV), mean corpuscular haemoglobin (MCH), mean corpuscular haemoglobin concentration (MCHC) and biochemical parameters such as plasma sodium (Na+), potassium (K+) and LDH levels. Data was collected and statistical analysis was done.Results: Statistically significant changes were observed between red cell units of up to 14 days and > 14 days old and pre irradiated samples in terms of plasma haemoglobin level, percent red cell haemolysis and plasma Na+, K+ and LDH levels. However, pre and post irradiation samples in each group of 14 days and >14 days showed significant changes in the plasma Hb and % haemolysis, Hb/unit, HCT, MCV and MCH in 14 days group while only in plasma Hb, MCV and MCH in >14 days group without any effect on plasma Na+, K+ and LDH levels in both group.Conclusion: Comparison at two different red cells storage groups i.e. period of up to 14 days and >14 days, showed significant changes in haematological and biochemical parameters. In the pre irradiation group this reflects the gradual storage changes over time even without going through the irradiation process. On the other hand, the changes between pre and post–irradiation for both the groups of storage showed significant haematological changes indicating irradiation itself also causes significant changes. In view of all these findings, we recommend to irradiate the allogeneic red cell units within 14 days of collection to reduce the adverse effects resulted from irradiation on the cellular products.Bangladesh Journal of Medical Science Vol.17(1) 2018 p.30-35
Renal function in Thalassemia major patients who treated by Desferal
Authors: Zafari Mandana , Aghamohammady Azar , Mosavy Masoomeh
Published: January 2018

Background and purpose: β-thalassemia is the most common inherited hemoglobinopathy in all over the world. Iron over load will be appearing in kidney following blood transfusion. Desferal is one of iron chelator that can be ended renal complication. The aim of this study is evaluation the renal function in β- Thalassemia patients who were treated by Desferal.Materials and methods: in this descriptive and analytic study 40 thalassemia patients who were treated by Desferal and 40 non Thalassemia subjects enrolled in this study randomly. For evaluation the renal function in these groups, we measured the Cr, BUN, K, Na, Uric acid, β-2 globin, Ca, Mg, P and Urea of blood and Na, K, Cr, protein and volume of urine 24 hours. We compared these variables between two groups. Also descriptive and analytic analyses were used, the significant level in this study was p≤0.05.Results: comparing the renal function between two groups show that; the level of Na, Ca, K and β-2 Globin in serum and Cr, protein and urine volume in 24 hours had significant difference.Conclusion: renal dysfunction such as; glomerular and tubular dysfunction and reduced filtration capacity are common in β-thalassemia patients.Bangladesh Journal of Medical Science Vol.17(1) 2018 p.58-61
Effects of “Bacterfree Hand Intervention” on the knowledge, attitude of handwashing and its technique, among pre-schoolers in Wilayah Persekutuan, Malaysia.
Authors: Mohamed Nurul Azmawati , Mohamed Ridzuwan Mohamad Haizif , Ungah Nurul Atiqah Embok , Jamaluddin Tengku Zetty Maztura Tengku
Published: January 2018

Background and objective: Through contaminated hands, number of infectious disease can be transmitted from one person to another. Salmonella spp, E. coli O157, norovirus and adenovirus that can cause diarrheal and respiratory infections are transmitted either directly or indirectly via contaminated objects. Children are at higher risk of getting such infections as they lack natural immunity and understanding of the importance of good hygiene. Hand washing is one of the most important factors in controlling the spread of the microorganisms. This study aimed to determine the knowledge and attitude of hand washing and the hand washing technique, in relation to “Bacterfree Hand Intervention” among pre-schoolers.Materials and methods: This cluster-randomized trial involved 146 pre-schoolers from 3 different pre-schools in Wilayah Persekutuan was conducted from April to August 2015.Participants were interviewed twice; pre and post intervention. Face-to-face interview was done using guided questionnaires that include questions on knowledge and attitude of hand washing and its techniques. A group of students were given single intervention i.e. posters and the other group participated in “Bacterfree Hand Intervention” program which consisted of storytelling, posters and demonstration.Results: There were significant increase of knowledge (median (10.00 vs 11.00, P< 0.001) and technique(6.00 vs 6.00, P = 0.020) after intervention in single intervention group while the attitude (median 6.00 vs 6.00, P= 0.871) was remained unchanged. Meanwhile, the median of knowledge, attitude and hand washing techniques in multiple intervention group increased significantly after intervention.Conclusions: This study highlighted the need of comprehensive educational programs that include various mode of delivery to create awareness regarding the importance of hand hygiene among pre-school children. This is very important to establish healthy environment and eventually prevent communicable diseases in the community.Bangladesh Journal of Medical Science Vol.17(1) 2018 p.67-70
Study of Cucurbita extract effect on changes of AGEs, lipid and glycemic profile and CRP in type 1 diabetic rats
Authors: Sayahi Miaad , Shirali Saeed
Published: January 2018

Background: Clinically, diabetes is an important risk factor or a range of diseases including nephropathy,retinopathy, angiopathy and deficiency and it is increasing in prevalence according to some estimates. (Cucurbita pepo L.) from the cucurbitaceae family has a low calorie but high nutritional and medical value. The aim of this study was to observe the effect of cucurbita extract on serum factors of STZ induced diabetic rats including glucose level AGEs, lipid profile (cholesterol, HDL, LDL, and TG) and CRP.Material and methods: Diabetes type1 was induced to Male albino- wistar rats by STZ at a dosage of 50 mg kg-1. 17 rat were divided into three groups randomly including diabetic treated with extract, diabetic control and normal group. Diabetic group were force fed orally by cucurbita extract. The animals were anesthetized with ether at the end of 30 days and the blood was collected by syringe from their hearts for estimation of plasma glucose, TG, HDL, LDL, total cholesterol, CRP and AGEsResults: After measuring the serum factors and compares the result of the three groups to each other meaningful difference that shows the positive effect of cucurbita extract has been seen.Conclusion: According to the results we suggest that squash extract could have positive effect on regulating some of blood elements like glucose which are under the bad effect of diabetes type1 in rats. But more investigations are needed in this field to demonstrate the real benefits of cucurbita in curing diabetes and its related signs.Bangladesh Journal of Medical Science Vol.17(1) 2018 p.84-87
A Case of Chronic Otitis Media Complicated with Cerebellar Abscess
Authors: Zainuddin Nazli , Mohd Khalid Mohd Shukry
Published: January 2018

Introduction:Intracranial complications are a known sequale of chronic otitis media. Meningitis is the most common intracranial complication, followed by otogenic brain abscess. Temporal lobe abscesses are more frequently reported in the literature as compared to cerebellar abscesses.Case Report: We present a case of chronic otitis media with cerebellar abscess that need drainage of the abscess twice. The mastoidectomy was done few days later once the patient stable.Conclussion: The case report highlights the increasing incidence of cerebellar abscess as an intracranial complicationwith literatures review. Besides that, we also discuss about the appropriate timing of ear surgery and neurosurgical drainage, as well as its outcome.Bangladesh Journal of Medical Science Vol.17(1) 2018 p.149-151
Unilateral vocal cord palsy as the presentation of metastatic mediastinal adenocarcinoma
Authors: Mohamad Irfan , Nadarajan Chandran , Safiya Thin Thin Win
Published: January 2018

Introduction: Unilateral vocal cord palsy is more common than the bilateral cases. The left side is more affected than the right side owing the longer course of the Left recurrent laryngeal nerve. Iatrogenic causes for example thyroidectomy or cardiac surgery predominate the etiology of its incidence.Methods: A review of medical case record.Results: A 68-year-old man presented with voice change for one month duration. It was associated with occasional shortness of breath. Examination showed unilateral Left vocal cord palsy. Further investigation revealed a huge anterior mediastinal mass. A CT-guided biopsy was performed and histopathologically confirmed as adenocarcinoma.Conclusion: Any lesion in the course of recurrent laryngeal nerve can lead to vocal cord palsy and change of voice. A metastatic lesion to mediastinal nodes even though very rare can be one of them. Mediastinal lymphoma is one of its differential diagnoses.Bangladesh Journal of Medical Science Vol.17(1) 2018 p.172-174
Dialogics, Diacritics, Diasporics: Ranjan Ghosh, J. Hillis Miller, and the Becoming-Now of Theory
Authors: Margaroni Maria
Published: January 2018

My aim in this essay is to reflect on the compelling dialogic project undertaken by Ranjan Ghosh and J. Hillis Miller in Thinking Literature Across Continents, focusing in particular on its implications for contemporary literary theory. Situating this project within a wider philosophical tradition that invests in dialogue as the textual space where theorein is the product of a synergic as much as conflictual endeavor, I argue that the Ghosh-Miller exchange across continents performs the becoming-Now of literary theory. In other words, I suggest that the dialogic encounter among more-than-one voices in this book reclaims the immanent doing of theory and cultivates a world-concerned thinking that diverges from dominant paradigms of theoria as the experience of an inevitable belatedness. Reading for the silences and tensions in the intimate, entangled becoming staged by the Ghosh-Miller book, I demonstrate how the process of worlding in the literary field can unfold in a minor mode, introducing hermeneutic possibilities that deterritorialise Angloglobalism and diffractively infringe habituated colonial traditions.
Transform a Simple Sketch to a Chinese Painting by a Multiscale Deep Neural Network
Authors: Lin Daoyu , Wang Yang , Xu Guangluan , Li Jun , Fu Kun
Published: January 2018

Recently, inspired by the power of deep learning, convolution neural networks can produce fantastic images at the pixel level. However, a significant limiting factor for previous approaches is that they focus on some simple datasets such as faces and bedrooms. In this paper, we propose a multiscale deep neural network to transform sketches into Chinese paintings. To synthesize more realistic imagery, we train the generative network by using both L1 loss and adversarial loss. Additionally, users can control the process of the synthesis since the generative network is feed-forward. This network can also be treated as neural style transfer by adding an edge detector. Furthermore, additional experiments on image colorization and image super-resolution demonstrate the universality of our proposed approach.
Supercritical Regeneration of an Activated Carbon Fiber Exhausted with Phenol
Authors: Sanchez-Montero M. , Pelaz Jennifer , Martin-Sanchez Nicolas , Izquierdo Carmen , Salvador Francisco
Published: January 2018

The properties of supercritical CO2 (SCCO2) and supercritical water (SCW) turn them into fluids with a great ability to remove organic adsorbates retained on solids. These properties were used herein to regenerate an activated carbon fiber (ACF) saturated with a pollutant usually contained in wastewater and drinking water, phenol. Severe regeneration conditions, up to 225 bar and 400 °C, had to be employed in SCCO2 regeneration to break the strong interaction established between phenol and the ACF. Under suitable conditions (regeneration temperature, time, and pressure, and flow of SCCO2) the adsorption capacity of the exhausted ACF was completely recovered, and even slightly increased. Most of the retained phenol was removed by thermal desorption, but the extra percentage removed by extraction allowed SCCO2 regeneration to be significantly more efficient than the classical thermal regeneration methods. SCCO2 regeneration and SCW regeneration were also compared for the first time. The use of SCW slightly improved regeneration, although SCW pressure was thrice SCCO2 pressure. The pathways that controlled SCW regeneration were also investigated.
Acknowledgement to Reviewers of Catalysts in 2017
Authors:   Catalysts Editorial Office
Published: January 2018

Peer review is an essential part in the publication process, ensuring that Catalysts maintains high quality standards for its published papers[...]
Bee Diversity and Solanum didymum (Solanaceae) Flower–Visitor Network in an Atlantic Forest Fragment in Southern Brazil
Authors: Lando Francieli , Lustosa Priscila , P. da Luz Cyntia , Buschini Maria
Published: January 2018

Brazil’s Atlantic Forest biome is currently undergoing forest loss due to repeated episodes of devastation. In this biome, bees perform the most frequent pollination system. Over the last decade, network analysis has been extensively applied to the study of plant–pollinator interactions, as it provides a consistent view of the structure of plant–pollinator interactions. The aim of this study was to use palynological studies to obtain an understanding of the relationship between floral visitor bees and the pioneer plant S. didymum in a fragment of the Atlantic Forest, and also learn about the other plants that interact to form this network. Five hundred bees were collected from 32 species distributed into five families: Andrenidae, Apidae, Colletidae, Megachilidae, and Halictidae. The interaction network consisted of 21 bee species and 35 pollen types. The Solanum-type bee species with the highest number of interactions were Anthrenoides sp. 1, Augochlora sp. 2, and Augochloropsis notophos, representing 71.78% of their interactions. Augochloropsis notophos and Augochlora sp. 2 were the only common species in the flowers of S. didymum. Given the results of our study, we conclude that Solanum is an important source of pollen grains for several native bee species, mainly for the solitary species that are more diverse in the south of Brazil. Moreover, our results indicate that bees from the families Halictidae (A. notophos, Augochlora) and Andrenidae (Anthrenoides) are the pollinators of S. didymum.
Information-Theoretic Analysis of a Family of Improper Discrete Constellations
Authors: Santamaria Ignacio , Crespo Pedro , Lameiro Christian , Schreier Peter
Published: January 2018

Non-circular or improper Gaussian signaling has proven beneficial in several interference-limited wireless networks. However, all implementable coding schemes are based on finite discrete constellations rather than Gaussian signals. In this paper, we propose a new family of improper constellations generated by widely linear processing of a square M-QAM (quadrature amplitude modulation) signal. This family of discrete constellations is parameterized by κ , the circularity coefficient and a phase ϕ . For uncoded communication systems, this phase should be optimized as ϕ * ( κ ) to maximize the minimum Euclidean distance between points of the improper constellation, therefore minimizing the bit error rate (BER). For the more relevant case of coded communications, where the coded symbols are constrained to be in this family of improper constellations using ϕ * ( κ ) , it is shown theoretically and further corroborated by simulations that, except for a shaping loss of 1.53 dB encountered at a high signal-to-noise ratio (snr), there is no rate loss with respect to the improper Gaussian capacity. In this sense, the proposed family of constellations can be viewed as the improper counterpart of the standard proper M-QAM constellations widely used in coded communication systems.
Image Segmentation Based on Statistical Confidence Intervals
Authors: Buenestado Pablo , Acho Leonardo
Published: January 2018

Image segmentation is defined as a partition realized to an image into homogeneous regions to modify it into something that is more meaningful and softer to examine. Although several segmentation approaches have been proposed recently, in this paper, we develop a new image segmentation method based on the statistical confidence interval tool along with the well-known Otsu algorithm. According to our numerical experiments, our method has a dissimilar performance in comparison to the standard Otsu algorithm to specially process images with speckle noise perturbation. Actually, the effect of the speckle noise entropy is almost filtered out by our algorithm. Furthermore, our approach is validated by employing some image samples.
Assesment of Thermodynamic Irreversibility in a Micro-Scale Viscous Dissipative Circular Couette Flow
Authors: Mondal Pranab , Wongwises Somchai
Published: January 2018

We investigate the effect of viscous dissipation on the thermal transport characteristics of heat and its consequence in terms of the entropy-generation rate in a circular Couette flow. We consider the flow of a Newtonian fluid through a narrow annular space between two asymmetrically-heated concentric micro-cylinders where the inner cylinder is rotating at a constant speed. Employing an analytical methodology, we demonstrate the temperature distribution and its consequential effects on the heat-transfer and entropy-generation behaviour in the annulus. We bring out the momentous effect of viscous dissipation on the underlying transport of heat as modulated by the degree of thermal asymmetries. Our results also show that the variation of the Nusselt number exhibits an unbounded swing for some values of the Brinkman number and degrees of asymmetrical wall heating. We explain the appearance of unbounded swing on the variation of the Nusselt number from the energy balance in the flow field as well as from the second law of thermodynamics. We believe that the insights obtained from the present analysis may improve the design of micro-rotating devices/systems.
Enhancing Pre-Service Special Educator Preparation through Combined Use of Virtual Simulation and Instructional Coaching
Authors: Peterson-Ahmad Maria
Published: January 2018

To meet the ever-increasing teaching standards, pre-service special educators need extensive and advanced opportunities for pedagogical preparation prior to entering the classroom. Providing opportunities for pre-service special educators to practice such strategies within a virtual simulation environment offers teacher preparation programs a way to individualize the teaching and practice of various pedagogical aspects needed when new educators enter their first classroom. Coupling such simulations with specific instructional coaching allows for increased and individualized remediation of the way instruction is given, classroom management practices, or getting to know your student population. This exploratory case study investigated the extent to which virtual simulations combined with instructional coaching impacted the way pre-service educators learned how to provide opportunities to respond (OTR) to the avatar students through the repeated teaching of a lesson over four sessions.