Analisis Kebutuhan Daya Listrik Pada Kapal Curah KM TL XVIII Dalam Rangka Efisiensi Energi

Kapal Curah KM TL XVIII merupakan kapal kargo pengangkut semen curah yang memiliki 3 buah generator set dengan masing-masing daya generator adalah 225 kW. Untuk membangkitkan daya listrik yang dibutuhkan pada kapal curah KM TL XVIII maka generator set yang terpasang harus mampu beroperasi secara optimal dan efisien. Namun, dalam pembagian beban pada setiap generator set kurang optimal dan efisien sehingga konsumsi bahan bakar generator menjadi lebih boros. Kegiatan ini bertujuan untuk menentukan sistem penggunaan generator yang optimal untuk tiap kondisi operasional dan efisiensi konsumsi bahan bakar generator selama satu kali perjalanan. Salah satu cara dalam menentukan sistem penggunaan generator yang optimal dan efisiensi konsumsi bahan bakar generator adalah menggunakan metode dynamic programming dengan melakukan perhitungan pembagian beban. Sehingga diperoleh hasil analisa menunjukkan penggunaan generator 2 saat sandar, generator 2 saat berlayar, generator 2 dan 3 saat muat, dan generator 2 dan 3 saat bongkar. Adapun nilai efisiensi konsumsi bahan bakar generator adalah sebesar 23.733,1 liter dengan nilai persentase efisiensi sebesar 15,94%. Jika dibandingkan dengan data di lapangan dengan jumlah penggunaan bahan bakar generator terbesar pada tahun 2020 adalah sebesar 29.324 liter selama satu kali perjalanan maka lebih efisien 5.590.9 liter

PKM PEMBERDAYAAN MASYARAKAT USAHA TERNAK AYAM KAMPUNG MELALUI TEKNOLOGI MESIN TETAS TELUR OTOMATIS DI DESA BONTOSUNGGU KABUPATEN GOWA

PKM PEMBERDAYAAN MASYARAKAT USAHA TERNAK AYAM KAMPUNG MELALUI TEKNOLOGI MESIN TETAS TELUR OTOMATIS DI DESA BONTOSUNGGU KABUPATEN  GOW

NURETH-15, Pisa (Italy), May 12-17, 2013 – Summary

Summary information about NURETH-15 Conference is provided in the present document. This intends to cover the conduct of the Conference and to provide highlights about the planning. Insights from the technical-scientific content of the papers and financial report shall be the subject of forthcoming documents. More details can be found on the website www.NURETH15.org. 1. Conference Conduct The NURETH-15 Conference has been held in Pisa May 12-17, 2013. F. D’Auria (General Chair) opened the Conference. The Welcome Address Session was chaired by M. Cumo (Honorary Chair together with N. Todreas). Key design features of the Conference are listed below: The Conference venue included three cities in Tuscany, Florence (‘Corsini Palace’), Lucca (‘Regio Collegio’) and Pisa with four locations (Verdi Theater, Congress Palace, Former Railway Station ‘Leopolda’ and Church ‘Del Carmine’). This needed special logistic arrangements including close attention at each cross-point. Specific Conference plans included: - Student Sessions. - Selection of NURETH Fellows (among around 6000 authors of all NURETH Conferences, since NURETH-1 in 1980, see below). - Poster Session. - Invited Speakers as distinguished Lecturers and Chairmen introducing the key Plenary Sessions. - Pre-Conference and Post-Conference Workshops. Committees were formed previous to Conference dates and worked during the Conference: - To select the Best Poster papers, Chair Y. Hassan (three awards given, see below). - To select the Best Oral papers, Chair N. Aksan (three awards given, see below). - To select the Best Student papers, Chair N. Cavlina (three awards given, see below). - To plan Technical Journal publication of selected papers, Chair N. Aksan (also expected to work after the Conference). A NURETH poster was created including the names of all NURETH authors (from NURETH-1 to NURETH-15, around 6000 scientists as already mentioned) and pictures from each NURETH Conference. About five hundred scientists, 432 registered participants with payment, NURETH Fellows (the list of those attending is provided below), selected Invited Speakers and undergraduate students from University of Pisa (who also served as stewards in each of the Conference sessions and places), attended the NURETH-15 Conference

Pengaruh Kompetensi, Lingkungan Kerja dan Kepuasan Kerja terhadap Kinerja Pegawai di Up Ptsp (Studi Kasus Kota Administrasi Jakarta Barat)

This study aims to examine and analyze the influence of competency, work environment toward job satisfaction, competency, work environment toward job perpormance and job satisfaction toward job perpormance the employees of UP PTSP West Jakarta Design research using quantitative research methods explanatory, with a population all PNS UP PTSP West Jakarta. The sampling technique using simple random sampling The sample are used 190 respondents. Mechanical analysis using Structural Equation Modelling (SEM) with software Linear Structural Relationship (LISREL), Based on results of data processing and analysis showed that the variable of competency and work environment have a significant positive effect on job satisfaction.Competency has a significant positive effect on job performance, while work environment has positive but not significant effect on job performance. Job satisfaction has significant positive effect on job performance. So in this study that variables most influence on job performance is higher variables competency and job satisfactio

Decrease of Ca3Co4O9+δ thermal conductivity by Yb-doping

In this study, the effect of Yb-substitution on the structural, electrical and thermal transport properties of the CaCoO system has been investigated in the low temperature region (between 10 and 300 K). The resistivity of samples increases with raising the Yb-concentration in the system. All the samples show a metal-semiconductor transition below 85 K. In the analysis based on Strongly Correlated Fermi Liquid Model, an increased bandwidth and a reduced electronic correlation are found. It has also been found that the energy gap, E , value also decreases with Yb-substitution. The samples show positive thermoelectric power, indicating that dominant charge carriers are holes in all the samples. The thermoelectric power value decreases with Yb-substitution. From Mott equation, it is determined that the Fermi energy and hole concentration decrease in the Yb-susbtituted samples, compared to the undoped ones. Thermal conductivity, κ, is decreased in about 50% of the measured in undoped samples for the 0.01 and 0.03 Yb-doped samples at 300 K. Highest figure of merit, ZT, value is found to be 5.4 10 at 300 K for the unsubstituted sample and the ZT value decreases by the substitution.The authors wish to thank the MINECO-FEDER (Project MAT2013-46505-C3-1-R) and the Gobierno de Aragón and Fondo Social Europeo (Research Groups T12 and T87) for financial support.Peer Reviewe

FONESYS and SILENCE Networks: Looking to the Future of T-H Code Development and Experimentation

The purpose of this paper is to present briefly the projects called FONESYS (Forum & Network of System Thermal-Hydraulics Codes in Nuclear Reactor Thermal-Hydraulics) and SILENCE (Significant Light and Heavy Water Reactor Thermal Hydraulic Experiments Network for the Consistent Exploitation of the Data), their participants, their motivations, their main targets and working modalities. System Thermal-Hydraulics (SYS-TH) codes, also as part of the Best Estimate Plus Uncertainty (BEPU) approaches, are expected to achieve a more-and-more relevant role in nuclear reactor safety and design technology. Namely, the number of code-users is likely to increase in the countries where nuclear technology is exploited. Thus, the idea of establishing a forum and a network among the code developers and with possible extension to code users has started to have major importance and value. In this framework, the FONESYS initiative has been launched in 2010 aiming at creation of a common ground for discussing current limitations and envisaged improvements in various areas of SYS-TH and their application in the licensing process and safety analysis. According to FONESYS statute, there are seven signatory Institutions and two observer Institutions currently participating in the project. Signatory Institutions are AREVA-NP, Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA), San Piero a Grado Nuclear Research Group - University of Pisa (GRNSPG-UNIPI), Gesellschaft für Anlagenund Reaktorsicherheit (GRS), Korea Atomic Energy Research Institute (KAERI), Korea Institute of Nuclear Safety (KINS), and VTT Technical Research Centre of Finland. SILENCE is a network that intends to promote the cooperation among teams of experimentalists managing or involved in significant experimental projects in nuclear reactor thermal-hydraulics, with the aim to contrast the risk of losing expertise and vision in this important area of the nuclear technology. This network was launched in 2012, replicating for the TH experimental domain the role that FONESYS plays in the code-development domain. Currently, the following Organizations are Members of SILENCE: AREVA GmbH, Helmholtz Zentrum Dresden-Rossendorf (HZDR), Korea Atomic Energy Research Institute (KAERI), Hungarian Academy of Sciences Centre for Energy Research (MTA EK),Lappeenranta University of Technology (LUT), and Paul Scherrer Institute (PSI). SILENCE is currently organizing a “Specialists Workshop on Advanced Instrumentation and Measurement Techniques for Nuclear Reactor Thermal Hydraulics” (SWINTH-2016). The San Piero a Grado Nuclear Research Group - University of Pisa (GRNSPG-UNIPI) is the Host Institution and plays as a Scientific Secretariat for both Networks

Trehalose loading through the mitochondrial permeability transition pore enhances desiccation tolerance in rat liver mitochondria

AbstractTrehalose has extensively been used to improve the desiccation tolerance of mammalian cells. To test whether trehalose improves desiccation tolerance of mammalian mitochondria, we introduced trehalose into the matrix of isolated rat liver mitochondria by reversibly permeabilizing the inner membrane using the mitochondrial permeability transition pore (MPTP). Measurement of the trehalose concentration inside mitochondria using high performance liquid chromatography showed that the sugar permeated rapidly into the matrix upon opening the MPTP. The concentration of intra-matrix trehalose reached 0.29 mmol/mg protein (∼190 mM) in 5 min. Mitochondria, with and without trehalose loaded into the matrix, were desiccated in a buffer containing 0.25 M trehalose by diffusive drying. After re-hydration, the inner membrane integrity was assessed by measurement of mitochondrial membrane potential with the fluorescent probe JC-1. The results showed that following drying to similar water contents, the mitochondria loaded with trehalose had significantly higher inner membrane integrity than those without trehalose loading. These findings suggest the presence of trehalose in the mitochondrial matrix affords improved desiccation tolerance to the isolated mitochondria

Parent–child interactions and obesity prevention : a systematic review of the literature

Child obesity research has generally not examined multiple layers of parent&ndash;child relationships during weight-related activities such as feeding, eating and play. A literature review was conducted to locate empirical studies that measured parent&ndash; child interactions and child eating and child weight variables; five papers met the inclusion criteria and were included in the review. The findings of the review revealed that parent&ndash;child relationships are an important element in explaining the unhealthy trend of childhood obesity. We argue that prevention/intervention strategies must extend on the current models of parenting by targeting the family from a bi-directional perspective, and focusing, specifically, on the mutually responsive orientation that exists in the parent&ndash;child relationship.<br /

Effect of secondary annealing process on critical current density in highly textured Bi-2212 superconducting system

Bi-2212 samples prepared by a solid-state reaction technique have been grown from the melt using the laser floating zone method. After annealing the as-grown bars, the samples showed a good grain alignment and a high transport critical current density. Secondary annealing processes were performed on the annealed samples with the aim of producing Bi-2212 phase controlled decomposition. Hence, the Bi-2201 phase and the secondary phases, which act as effective pinning centers, were obtained with the secondary annealing process. After these thermal treatments, the transport critical current densities of samples significantly increased, when compared to the annealed ones. The maximum critical current density was achieved when the samples were subjected to secondary annealing at 680°C for 168 h with an improvement of ~80%, compared to the annealed ones. Moreover, it was found that magnetization of the secondarily annealed samples was also increased. The magnetic critical current densities in these secondary annealed samples were about 3 times higher than the values obtained for the annealed ones. These results clearly indicate that the secondary annealing processes lead to the formation of effective pinning centers in the bulk material.The authors acknowledge financial support from the Gobierno de Aragón (Grupos de Investigacion Consolidados T12 and T87) and the Spanish MINECO-FEDER (Project MAT2013-46505-C3-1-R).Peer Reviewe

Critical flow prediction by system codes – Recent analyses made within the FONESYS network

A benchmark activity on Two-Phase Critical Flow (TPCF) prediction was conducted in the framework of the Forum &amp; Network of System Thermal-Hydraulics Nuclear Reactor Thermal-Hydraulics (FONESYS). FONESYS is a network among code developers who share the common objective to strengthen current technology. The aim of the FONESYS Network is to highlight the capabilities and the robustness as well as the limitations of current SYSTH codes to predict the main phenomena during transient scenarios in nuclear reactors for safety issues. Six separate effect test facilities, more than 90 tests, both in steady and transient conditions, were considered for the activity. Moreover, two ideal tests were designed for code to code comparison in clearly defined conditions. Overall eight System Thermal-Hydraulic (SYS-TH) codes were adopted, mostly by the developers themselves, ensuring the minimization of the user effect. Results from selected tests were also compared against Delayed Equilibrium Model, not yet implemented in industrial version of SYS-TH codes. Generally, the results of the benchmark show an improvement of the capability of SYS-TH codes to predict TPCF in the last three decades. However, predicting break flowrate remains a major source of uncertainty in accidental transient simulations of Water-Cooled Nuclear Reactors (WCNR). A set of possible actions is proposed to go beyond the current limitations of choked flow models. More detailed guidelines for using 0-D choked flow models is possible by using the experience gained by the benchmark results as well as all available validation results. Progress in understanding and 1-D modelling of flashing and choked flow might be achieved by a deeper physical analysis leading to more mechanistic models based on specific flow regime maps for high speed flow. Also the use of advanced 3-D numerical tools may help to understand and predict the complex 3-D geometrical effect