Use of enriched live prey in promoting growth and maturation of tiger shrimp (Penaeus monodon)

This study was undertaken to determine the effect of nutritional management of broodstock of Penaeus monodon on growth and maturation. Test specimens were obtained from a grow-out pond before attainment of maturity and were reared in hatchery tanks. Four types of dietary treatments (M1–M4) were given to separate batches that were run in duplicate. Feeding trials continued for five months. A diet with live bloodworm, bioencapsulated to contain tricalcic phosphate as its major component, was found to be the most efficient. Specimens of this particular batch assimilated food more efficiently, grew at a faster rate and attained maturity earlier than other groups. Bloodworm provided the lipid fractions for which there is no de novo synthesis in shrimp. The enrichment product acted by promoting somatic growth and increasing transfer of biochemical constituents needed by the ovary for develo

Use of enriched live prey in promoting growth and maturation of tiger shrimp (Penaeus monodon)

This study was undertaken to determine the effect of nutritional management of broodstock of Penaeus monodon on growth and maturation. Test specimens were obtained from a grow-out pond before attainment of maturity and were reared in hatchery tanks. Four types of dietary treatments (M1–M4) were given to separate batches that were run in duplicate. Feeding trials continued for five months. A diet with live bloodworm, bioencapsulated to contain tricalcic phosphate as its major component, was found to be the most efficient. Specimens of this particular batch assimilated food more efficiently, grew at a faster rate and attained maturity earlier than other groups. Bloodworm provided the lipid fractions for which there is no de novo synthesis in shrimp. The enrichment product acted by promoting somatic growth and increasing transfer of biochemical constituents needed by the ovary for development.Shrimp culture, Feeding experiments, Nutritional requirements, Diets, Growth, Sexual maturity Penaeus monodon

SWOT Analysis PotensidanStrategi Pengembangan Bisnis pada Cluster Sektor Perikanan Laut Kabupaten/ Kota di Jawa Timur

Penelitian ini mengembangkan strategi bisnis setiapcluster perikanan laut di Jawa Timur menggunakan SWOTanalysis didasarkan pada hasil cluster dari penelitian yang sudahdilakukan Rachman dan Yuniati (2016). Analisis ini didasarkanpada logika yang dapat memaksimalkan kekuatan (Strengths) danpeluang (Opportunity) namun secara bersamaan dapatmenimilkan kelemahan (Weakness) dan ancaman (Threats).Analisis ini didasarkan pada matriks IFE dan EFE, yaitumengevaluasi faktor-faktor internal dan eksternal dan kemudiandilanjutkan dengan memberikan bobot dengan skala yangditetapkan. Hasil pembobotan tersebut kemudian dicocokandalam kuadran matriks strategi. Hasil penelitian diperoleh bahwaCluster A yang terdiri dari Banyuwangi, Lamongan, Sumenepperlu mengembangkan strategi bisnis W-T Strategy yaitu strategiyang disusun dengan cara meminimalkan kelemahan untukmenghindari ancaman. Cluster B yang terdiri dari Gresik,Pamekasan, dan Mojokerto perlu mengembangkan strategi bisnisW-O strategy dengan cara meminimalkan kelemahan untukmemanfaatkan peluang yang ada. Cluster C yang terdiri dariPacitan, Trenggalek, Malang, Jember, Situbondo, Probolinggo,Pasuruan, Bangkalan, Sampang perlu mengembangkan S-Ostrategy yaitu dengan cara menggunakan semua kekuatan untukmerebut peluang. Cluster D yang terdiri dari Kabupaten/ KotaPonorogo, Tulungagung, Blitar, Kediri, Lumajang, Bondowoso,Sidoarjo, Mojokerto, Jombang, Nganjuk, Madiun, Magetan,Ngawi, Bojonegoro, Tuban, Kediri, Blitar, Malang, Probolinggo,Pasuruan, Surabaya, dan Batu perlu mengembangkan S-Tstrategy yaitu dengan menggunakan semua kekuatan untukmengatasi ancaman

Modeling of Common Rail Fuel Injection System of Four Cylinder Hydrogen Fueled Engine

Automotive system components, such as injection system, which have an increasing number of parameters and new design approaches, are required. It is no longer possible to optimize such a system solely based on experience or forward optimization. Modeling of hydrogen fuel injection system is a very important tool that can be used for predicting the effect of advanced injection strategies on combustion and emissions of a hydrogenfueled engine using port fuel injection. This paper addresses the modeling of common rail fuel injection system for four stroke four cylinder port injection hydrogen fueled engine. The common rail injection system model has been developed utilizing GT-FUEL commercial software. Focus is paid for the wave propagation phenomena arising in this system subsequent to the injection event and pressure oscillations that influence the injected fuel quantity. One dimensional flow equations in conservation form are employed to simulate wave propagation phenomena throughout the common rail (accumulator). The interaction effect of operational conditions including the engine speed and rail pressure is illustrated. The required compromise solutions are discussed in details. It can be seen that the common rail injection system is a promising enhancement for hydrogen port injection engine

Optical properties of tetrapod nanostructured zinc oxide by chemical vapour deposition

Tetrapod nanostructured zinc oxide (ZnO) thin films have been deposited onto indium tin oxide (ITO) coated glass substrate by thermal chemical vapor deposition (TCVD) technique. This work studies the effects of annealing temperature ranging from 100–500 ºC towards its physical and optical properties. FESEM images showed that the structural properties of tetrapod nanostructured ZnO thin film were affected by the annealing temperature. The thickness of thin film is strongly support the FESEM analysis. The optical band gap energy (Eg) was evaluated at 2.78 – 3.06 eV, which the ZnO thin film was found to be influenced by the change of interatomic spacing of semiconductor. The result shows that the higher annealing temperature greatly affects the physical structure of tetrapod nanostructured ZnO thin film to become narrow and longer length.Keywords: tetrapod; TCVD; synthesizing; annealing; zinc oxid

Effects of modified atmosphere packaging on microbiological load and physico-chemical properties of barramundi (Lates calcarifer Bloch) fillets at 8°C

Different modified atmosphere conditions with various CO2 concentrations on microbial load (psychrophile, mesophile aerobic and anaerobic bacteria) and physico-chemical properties of barramundi (Lates calcarifer Bloch) fillets stored at 8°C were compared to determine the best packaging conditions. The gas conditions evaluated were 100% CO2 (M1), 75% CO2/25% N2 (M2), 50% CO2/50% N2 (M3), 25% CO2/75% N2 (M4) and 100% N2 (control). High CO2 concentration (M1 and M2) of fish fillets delayed the psychrophilic bacteria growth compared to low CO2 concentration (50% and 25% CO2) as well as the mesophilic, anaerobic and histamine forming bacteria. We concluded that the atmosphere with 75:25% and 100:0 (CO2:N2) had the most appropriate gas composition to inhibit the microbial growth and prolong the shelf life of barramundi fillets (p<0.05)

INTRODUKSI INDIGOFERA ZOLLINGERIANA SEBAGAI UPAYA PENINGKATAN PRODUKTIVITAS TERNAK DI KELOMPOK TANI TERNAK RUKUN MAKMUR TANGKIT PROVINSI JAMBI

ABSTRAKProduktivitas ternak ruminansia, khususnya ternak sapi yang rendah sehubungan dengan ketersediaan dan akses terhadap pakan berkualitas yang kurang, dan minimnya pengetahuan tentang cara pembudidayaan hijauan khususnya legum pohon merupakan permasalahan yang dihadapi oleh peternak di kelompok Tani Rukun Makmur, Tangkit, Jambi. Disamping beternak, para peternak juga melakukan kegiatan pertanian yang didominasi oleh tanaman sayuran. Tujuan kegiatan Pengabdian Pada Masyarakat (PPM) ini untuk mengenalkan potensi Indigofera zollingeriana sebagai hijauan pakan ternak berkualitas dan pemberian bibit / benih I. zollingeriana ke peternak di kelompok Tani Rukun Makmur, Tangkit, Jambi. Metode yang dipakai dalam pencapaian tujuan adalah pendidikan masyarakat melalui penyuluhan. Solusi yang ditawarkan meliputi: 1) peningkatan pengetahuan peternak tentang pakan hijauan berkualitas dan cara budidayanya dalam lahan usaha tani sayuran melalui penyuluhan, dan 2) introduksi dan pemberian benih dan bibit. Kegiatan PPM yang meliputi penyuluhan dan penanaman bibit Indigofera berjalan lancar. Pelaksanaan penyuluhan terjadi di lapangan bersamaan dengan penanaman seluruh bibit yang diberikan. Hasil kegiatan pendampingan, peternak juga melakukan pembibitan dari benih yang diberikan. Kegiatan PPM ini diliput oleh media televisi lokal untuk disiarkan sekaligus sebagai ajang promosi bagi kelompok Tani Rukun Makmur yang menggeluti usaha penggemukan sapi. Kata kunci: Introduksi; Indigofera zollingeriana; pakan berkualitas; pendidikan masyarakat ABSTRACTThe low productivity of ruminants, especially cattle, is related to the availability and access to poor quality feed, and the lack of knowledge about how to cultivate forages, especially tree legumes, is a problem faced by farmers in the Rukun Makmur Farmer Group, Tangkit, Jambi. Besides raising livestock, the farmers also carry out agricultural activities which are dominated by vegetable crops.The purpose of this community service (PPM) activity was to introduce the potential of Indigofera zollingeriana as high-quality forage for livestock and provide I. zollingeriana seeds and seedlings to farmers in the Rukun Makmur Farmer group, Tangkit, Jambi. The method used in achieving the goals was community education through outreach activity. The solutions offered include: 1) improving farmers’ knowledge about quality forage and how to cultivate it in vegetable farming fields through outreach activity, and 2) introduction and provision of seeds and seedlings. The activities which included outreach activity and planting of Indigofera seedlings went right. The outreach activity took place in the field at the same time aplanting all the seedlingsas given. As a result of mentoring activities, farmers also carried out nurseries from the seeds provided. This outreach activity was broadcasted by local television media and a promotional event for the Rukun Makmur Farmer group, which has cattle fattening business. Keywords: high quality forage; Indigofera zollingeriana; introduction; community educatio

Unit circle elliptic beta integrals

We present some elliptic beta integrals with a base parameter on the unit circle, together with their basic degenerations.Comment: 15 pages; minor corrections, references updated, to appear in Ramanujan

A regional water quality model designed for a range of users and for retrofit and re-use

We discuss the motivations for, and software design concepts underpinning, the development of a regional water quality model. The Environmental Management Support System (EMSS) was developed to predict daily fluxes of runoff, total suspended sediment, total nitrogen and total phosphorous through a large-scale river network. It was built using a custom environmental modelling framework called Tarsier, founded on the Borland C++ Builder rapid application development environment. Three autonomous models are integrated within the EMSS, but are loosely coupled so that alternative models could be retrofitted into the system if desired. The three models share common data handling and visualisation routines resident in the Tarsier modelling environment and used in other modelling applications. The EMSS was designed for use by a range of stakeholders with varying levels of computer and technical proficiency. To satisfy their varying needs, we built three different interfaces, suited to ‘expert’, ‘intermediate’ and ‘basic’ users. The interfaces for the latter two groups were developed using interface prototyping methods, resulting in software that suited the user requirements. The object-oriented design employed in the coding of the EMSS has enhanced the extendibility and re-useability of the software. The EMSS development was part of a larger hydrologic modelling initiative aimed at reducing duplication in model building and standardising approaches to model design and delivery. The lessons learned during development of the EMSS have informed our future model development strategy

THE EFFECT OF LOCAL CULTURE-BASED MATERIAL TO READING ABILITY OF THE EIGHTH GRADE STUDENTS OF JUNIOR HIGH SCHOOL

The objectives of this study were to identify reading ability of students who were taught through local culture-based material, reading ability of students who were not taught through local culture-based material and to find out whether or not there is the significant effect of local culture-based material in improving reading ability of the eighth grade students of junior high school. The research was conducted at State Junior High School 9 Yogyakarta. This was an experimental research. The steps were pre-test, treatment and post- test. The data were collected by using multiple choice tests in form of pre-test and post- test. Then, data were analyzed by using descriptive analysis and inferential analysis. Based on descriptive analysis, the reading ability of the studentswho were taught by using local culture-based material were in good category with the mean of the group was 81.13. It is better than the students who were not taught using local culture-based material which the mean of the group was only 71.38. In line with it, the result of inferential analysis, showed by the result of ANCOVA with the probability value 0.000, it is lower than 0.05. Thus, H0 is rejected and H1 is accepted. It means that local culture-based material had significant effect in improving students’ reading ability. Keywords: Effectiveness, Local Culture-Based Material, Reading skil