Pengaruh Pemberian Jenis Pakan Yang Berbeda Terhadap Mutu Gonad Calon Induk Ikan Ingir-ingir (Mystus Nigriceps)

The research was conducted from January to March 2016 at the Fish Hatchery and Breeding Laboratory, Faculty of Fisheries and Marine Science University of Riau Pekanbaru. The aim of this research was to evaluate suitable feed for the maturation of the gonad of bagrid catfish (Mystus nigriceps) reared with different feeding treatment (Commercial feed; cookle meat; soilworm(annelid) and chopped fresh fish. The research method used was Completely Randomized Design (CDR) with four treatments and three replications. The result showed that chopped fresh fish (Poecilia reticulata) and commercial dry food were the best food for maturating the fish gonad of bagrid catfish (Mystus nigriceps). Total fish reached matured stage IV was 16 fish (88,89%), gonad somatic index 9,06 %, relative fecundity 835 eggs/g fish, egg diameter 0,85 mm. The temperature range from 28 – 310C, pH 5 – 6, DO 5,7 – 6,8 ppm

Proteksi Panas Lebih pada Generator Berbasiskan Smart Relay

One of abnormal conditions that may happen when operating synchronous generator is overheating at armature winding. Therefore, this condition is needed to overcome to avoid further damage in the generator by designing and implementing smart relay based overheating protection. Temperature at armature winding is as an input of the smart relay where it was measured by using LM35DZ sensor. Magnetic contactor was used as switch, where it will open when the temperature higher then setting value. The overheat protection design was implemented successfully where it can trip (disconnect generator from the system by opening magnetic contactor) when the armature winding temperature is higher than 60° C

Properties of Polyurethane Foam/Coconut Coir Fiber as a Core Material and as a Sandwich Composites Component

This research focuses on the fabrication and characterization of the sandwich composites panel using glass fiber composite skin and polyurethane foam reinforced coconut coir fiber core. The main objectives are to characterize the physical and mechanical properties and to elucidate the effect of coconut coir fibers in polyurethane foam cores and sandwich composites panel. Coconut coir fibers were used as reinforcement in polyurethane foams in which later were applied as the core in sandwich composites ranged from 5 wt% to 20 wt%. The physical and mechanical properties found to be significant at 5 wt% coconut coir fiber in polyurethane foam cores as well as in sandwich composites. It was found that composites properties serve better in sandwich composites construction

Penerapan Model Pembelajaran Kooperatif Tipe TIME Token Untuk Meningkatkan Prestasi Belajar Siswa Pada Pokok Bahasan Termokimia Di Kelas XI IPA Sman 2 Pekanbaru

The research is about applying type cooperative learning model Time Token. It was done to know the increase student achievementon the subject termokimia in class XI IPA SMAN 2 Pekanbaru. The type of this research is experimental research with pretest-postest design. The sample consists of two classes. They are class XI Science 2 as an experimental class and class XI Science 3 as a control class which were decided randomly after doing normality and homogenity test. Experimental class is a class that is applied cooperative learning model Time Token, while the control class was not. Data analysis technique used is the t-test. Based on analysis of data obtained tarithmetic> ttable is 1,82>1,66, means that the application of cooperative learning model Time Token can improve student achievement on the subject of termokimia class XI IPA SMAN 2 Pekanbaru, increase learning of 5,07%

Comparison effect of delamination factor (Fd) on unidirectional and woven kenaf fibre reinforced plastic composite materials during milling process [Pembandingan kesan faktor pelekangan (Fd) ke atas bahan komposit plastik bertetulang ekaarah dan bertenun semasa proses pemesinan kisar]

Serabut kenaf merupakan salah satu serabut berasaskan tumbuhan di dalam kumpulan serabut asli yang semakin luas penggunaannya. Serabut kenaf dicampurkan dengan bahan plastik (epoksi) bagi menghasilkan suatu bahan baharu dengan sifat mekanikal yang baik dengan kos pembuatan yang rendah. Bahan kerja ini terbahagi kepada dua jenis iaitu serabut kenaf ekaarah dan serabut kenaf tenunan. Uji kaji ini akan menumpukan kepada pembandingan kesan faktor pelekangan Fd yang terhasil semasa proses pemesinan kisar ke atas bahan komposit tersebut dengan penentuan set parameter mesin yang paling optimum bagi mengurangkan kesan Fd. Uji kaji dijalankan berdasarkan analisis kaedah gerak balas permukaan (RSM) dengan pendekatan reka bentuk Box-Behnken bagi mendapatkan hasil faktor bersandar terhadap sambutan. Faktor yang terlibat adalah kelajuan pemotongan, kadar suapan dan kedalaman pemotongan. Proses pengisaran secara lelurus (lurah) dilakukan bagi melihat kesan Fd yang terhasil dengan menggunakan perkakasan mata alat jenis Keluli Berkelajuan Tinggi (HSS) tidak bersalut hujung rata berdiameter 10 mm. Imej daripada mikroskop menunjukkan bahan komposit serabut kenaf ekaarah menghasilkan faktor pelekangan yang tinggi berbanding kesan ke atas bahan komposit serabut kenaf bertenun. Bagi set parameter optimum pula, bahan kerja serabut kenaf ekaarah ialah kelajuan pemotongan, kadar suapan dan kedalaman pemotongan yang rendah. Manakala bagi bahan kerja serabut kenaf bertenun, set parameter optimum adalah kelajuan pemotongan yang rendah dengan kadar suapan dan kedalaman pemotongan yang tinggi

Thermal Conductivity and Viscosity Of Al2o3 Nanofluids for Different Based Ratio of Water and Ethylene Glycol Mixture

In the thermal engineering applications, suspension of nanoparticles in conventional fluid has positive potential in enhancing the convective heat transfer performance. The evaluation of thermo-physical properties is essential to investigate the forced convection heat transfer of nanofluids. Hence, the present study reports the analysis on thermal conductivity and dynamic viscosity for Al2O3 nanoparticle dispersed in a different volume ratio of water (W) and ethylene glycol (EG) mixture. The Al2O3 nanofluids are formulated using the two-step method for three different base mixtures with volume ratio of 40:60, 50:50 and 60:40 (W:EG). The measurement of thermal conductivity and viscosity were performed using KD2 Pro Thermal Properties Analyzer and Brookfield LVDV-III Rheometer; respectively for temperature from 30 to 70 °C and volume concentration of 0.2–1.0%. The average thermal conductivity enhancement of Al2O3 nanofluids in the three base ratios varied from 2.6 to 12.8%. The nanofluids have better enhancement as the percentage of ethylene glycol increases. Meanwhile, the average dynamic viscosity enhanced up to 50% for 60:40 (W:EG). The enhancement of viscosity for nanofluids decreased with the increment percentage of ethylene glycol. The properties enhancement of the Al2O3 nanofluids is significantly influenced by the concentration, temperature, and based ratio

Penerapan Pendekatan Pembelajaran Inkuiri untuk Mencapai Ketuntasan Belajar Siswa pada Pokok Bahasan Laju Reaksi di Kelas XI Mia Sman 10 Pekanbaru

Research on the application of inquiry learning approach aims to achieve student's mastery learning on the topic of the reaction rate in class XI MIA 3 Senior Hight School Number 10 Pekanbaru. This research used one shot-study case design. Time of data retrieval from the date November 5rd – 11rd 2014. The sample was selected from the five existing classes, obtained class XI MIA 3. Data analysis technique used the percentage calculation of mastery learning classical. Based on the results of data processing obtained mastery learning classical of knowledge competency is 91,43 %, attitude competency is 100% and skill competency is 100%, means that the application of inquiry learning approach can achieve student's mastery learning on the topic of the reaction rate in class XI MIA 3 Senior Hight School Number 10 Pekanbaru

The Characterization of J-Integral for Elastic-Plastic Crack Growth Evaluation using Finite Element Analysis

J-integral is a fracture mechanic parameter that can be used to characterize elastic-plastic fracture mechanic (EPFM) behavior. The path independent characteristic in J-integral is proposed by Rice [1], and it is widely used in a lot of research. Another approach is the load-displacement approach, where the J-integral is calculated by the area under the load-displacement curve. However, the validity of the J-integral value by load-displacement approach is yet to be confirmed. This paper is aimed to investigate the effect of crack length ratio of CT specimen to J-integral value by two approaches: path-integral approach and load-displacement approach. Finite element analysis of compact tension (CT) model with crack length ratio a/W between 0.2 to 0.5 was carried out under displacement δ between 0.2 to 1.0 mm using ANSYS parametric design language (APDL). The J value by path integral approach, Jpath is compared to the value calculated from load-displacement approach, Jp-d. It was found that path independency occurs for J value evaluated from path integral approach. A correction factor needs to be introduced since the load-displacement approach cannot be used for shallow crack cases

UNDERSTANDING THE EFFECTS OF INTERPERSONAL COMMUNICATION AND TASK DESIGN ON JOB PERFORMANCE AMONG EMPLOYEES IN THE MANUFACTURING COMPANY

on job performance among employees from the manufacturing industry. Methodology: The data is analyzed through a survey (questionnaire) from 152 employees in one of the manufacturing companies in Penang, Malaysia. Hypotheses for all direct effects between the predictors (eg. interpersonal communication and task design) and criterion (job performance) are tested using regression analysis.  Result: Results presented that employees in this company have a high level of job performance (µ = 3.70); interpersonal communication (µ =3.64) and task design (µ =3.66). Also, positive correlations are found between employees’ performance and interpersonal communication (r=.53, p=.00) and task design (r=.54, p=.00). Implications: Thus, this research provided a fruitful knowledge regarding the level of employees’ performance as well as their internal communication and task design; among employees in one of the manufacturing company in Malaysia