scholarly journals Redesigning of 4 (Four) Blades Propeller Installed in a Wooden Fishing Boat in a Ship Yard in Tegal, Central Java Province

2019 ◽  
Vol 10 (2) ◽  
pp. 187-192
Author(s):  
Rifky Ismail ◽  
Mohammad Tauviqirrahman ◽  
Deni Mulyana ◽  
Fiki Firdaus ◽  
J. Jamari
Keyword(s):  
Fuel Efficiency ◽  
Three Dimensional ◽  
Open Water ◽  
Optimized Design ◽  
Theory Approach ◽  
Marine Propeller ◽  
Fishing Boat ◽  
Central Java ◽  
Propeller Design ◽  
Central Java Province

For design of marine propeller, the energy supply from marine engine to the propeller should be converted to thrust force with minimum losses. Furthermore, the unwanted vibration and cavitation due to the overlooking a detail calculation of the propeller should be prohibited for increasing the fuel efficiency and life-span of the propeller. In the last few decades, most of small and medium sized enterprises (SMEs) focusing their work on ship component industry in Central Java Province Indonesia provide the marine propeller to the ship manufacturer and ship repairmen in some shipyards in northern part of Central Java port. The design of the propeller is never been observed and optimized. The aim of the present work is to redesign the installed propeller on a wooden fishing boat with the new optimized design using B-Series propeller theory approach. The reverse engineering method uses three-dimensional scanner to obtain the geometrical data of the installed ship propeller. The new optimized propeller design is obtained from free software calculation based on the boat and engine specification. The comparison shows that the new optimized propeller design has a wider blade and larger pitch and increases 20% of the open water efficiency of the propeller performance at lower engine rotation. Keywords: B-series design, fishing boat, marine propeller, redesign, optimization

An Analysis of Village Fund Implementation in Central Java Province: An Institutional Theory Approach With a Modeling Institutional Aspect

2020 ◽  
Vol 5 (3) ◽  
pp. 203-215
Author(s):  
Eko Nur Surachman
Keyword(s):  
Content Analysis ◽  
Institutional Theory ◽  
Fiscal Decentralization ◽  
Theory Approach ◽  
Central Java ◽  
Relationship Model ◽  
Institutional Aspect ◽  
The Government ◽  
The Village ◽  
Central Java Province

The implementation of the fiscal decentralization concept in Indonesia has completed with the issuance of the Village Law and Village Fund Program. Nevertheless, some problems arose in the application. This study aims to map the issues and to build a relationship model based on institutional theory, using content analysis and triangle approach interviews. The study concludes that the Village Fund is profoundly affected by the coercive element that is sourced from the authority of the government to regulate and supervise the program. The coercive then influence the normative in which the regulation frame and strict implementation lead to the difficulties to fulfill the administrative requirements. It then affects the cognitive element on how to make sustain and executable planning of the Village Fund Program, which leads to poor planning, so that difficult to be executed. As it is mandatory, the program is still run improvised that makes the output utilization was low.         

An Open Water Numerical Model for a Marine Propeller: A Comparison With Experimental Data

2002 ◽  
Author(s):  
Julia´n Marti´nez-Calle ◽  
Laureano Balbona-Calvo ◽  
Jose´ Gonza´lez-Pe´rez ◽  
Eduardo Blanco-Marigorta
Keyword(s):  
Experimental Data ◽  
Numerical Model ◽  
Boundary Conditions ◽  
Test Performance ◽  
Fluid Dynamic ◽  
Three Dimensional ◽  
Open Water ◽  
Water Model ◽  
Wake Field ◽  
Fishing Boat

The open water model tests technique is well known and commonly used to predict propellers performance. In this paper, a quite different approach is intended and the main propeller variables are numerically modelled using a finite volume commercial code. Particularly, a fishing-boat propeller is numerically treated using a three-dimensional unstructured mesh. Mesh dependency and different turbulent models are considered together with an sliding technique to account for the rotation. Typical turbomachinery boundary conditions for a volume containing the propeller are imposed (inlet velocity and outlet static pressure). In order to get the open water test performance coefficients for the considered propeller (KT, KQ, η), different advance coefficient (J) are imposed as boundary conditions for the numerical model. The results of such simulations are compared with experimental data available for the open water tests of the propeller. Once the model is validated with the experimental data available, a wake field simulation would be possible and would lead to the definition of the fluid-dynamic variables (pressure, iso-velocity maps, etc.) which are needed during any design process. Also some comparisons with real scale thrust measurements are intended.

ECOLOGY AND SUSTAINABLE DEVELOPMENT IN LOCAL BUSINESS:SIMULATION OF LOW IMPACT DEVELOPMENT IN SURAKARTA REGENCY

2018 ◽  
Vol 4 (1) ◽  
pp. 32-38
Author(s):  
Bhimo Rizky Samudro ◽  
Yogi Pasca Pratama
Keyword(s):  
Water Resources ◽  
Water Resources Management ◽  
River Flow ◽  
Low Impact Development ◽  
Development Model ◽  
Business Activity ◽  
Resources Management ◽  
Central Java ◽  
Specific Culture ◽  
Central Java Province

This paper will describe the function of water resources to support business activities in Surakarta regency, Central Java province. Surakarta is a business city in Central Java province with small business enterprises and specific culture. This city has a famous river with the name is Bengawan Solo. Bengawan Solo is a River Flow Regional (RFR) to support business activities in Surakarta regency. Concious with the function, societies and local government in Surakarta must to manage the sustainability of River Flow Regional (RFR) Bengawan Solo. It is important to manage the sustainability of business activity in Surakarta regency.   According to the condition in Surakarta regency, this paper will explain how the simulation of Low Impact Development Model in Surakarta regency. Low Impact Development is a model that can manage and evaluate sustainability of water resources in River Flow Regional (RFR). Low Impact Development can analys goals, structures, and process water resources management. The system can also evaluate results and impacts of water resources management. From this study, we hope that Low Impact Development can manage water resources in River Flow Regional (RFR) Bengawan Solo.  

Management Dakwah Mosque in Eradicate Use Drugs Problem in Adolescent

2016 ◽  
Vol 1 ◽  
pp. 224-231
Author(s):  
Abdul Aziz
Keyword(s):  
Drug Abuse ◽  
Social Action ◽  
Field Research ◽  
Drug Problem ◽  
Religious Activities ◽  
Central Java ◽  
Youth Activities ◽  
Younger Generation ◽  
Education And Development ◽  
Central Java Province

The mosque is a building or an environment surrounded by a fence, especially built for the worship of God Almighty and most commendable. The mosque will function and will be very meaningful if there is proper management and good. Mainly using management science, and one of them is religious propaganda management. It is one of the Islamization of education all because it is a kenyatan that education and development as a process of intensive, to make someone to be able to optimize the physical and non physical aspects. Purpose writing  this is to describe the management of the mosque and its application to ensure that drug abuse does not occur in the younger generation. Today, this problem becomes a reality in cities and villages almost become a culture, as we all know that genersi youth as part of the religion, country and product of the nation if it was not in physical condition is good and fit will take them on social action, crime such as theft, drug abuse. One solution is the mosque's activities. Based on these problems, the authors really want to know the role of propaganda bagimana done to address the drug problem in the younger generation. Writing is supported by literature and field research. And the authors get the data through observation, interviews and documentation. Then analyze the data from a reduction, to see the data and conclusions. While the subject of research is the mosque of Abu Bakr As-Sidiqdesa Grujugan Kemranjen districts Banyumas in Central Java province of Indonesia. Based on the results there are: (1) Masjid Abu Bakar As-Sidiq using good management on the physical plane and function. (2) Management of religious proselytizing by DKM and Ikrima to ensure to prevent drug abuse in rural districts Grujugan Kemranjen Banyumas regency, Central Java Province using religious activities such as youth activities in the field of sports, the call of young people or youth build character.

Soy milk and avocado juice: what is the best to reduce cholesterol among obesity children?

2019 ◽  
Vol 1 (2) ◽  
Author(s):  
Rizki Agustin Purwaningtyas ◽  
Kustiningsih Kustiningsih
Keyword(s):  
Physical Activity ◽  
Cholesterol Level ◽  
Male Student ◽  
Control Group ◽  
P Value ◽  
Soy Milk ◽  
High Cholesterol ◽  
Central Java ◽  
Equivalent Control ◽  
Central Java Province

Children with obesity have high risk to have abnormal cholesterol rate. Obesity and high cholesterol rate can cause cardiovascular disease at a later time. Children have normal rate of cholesterol if the cholesterol rate in the blood is <170 mg/dL, the threshold category between 170-199 mg/dL, and high category is >200 mg/dL. Soy Milk and avocado juice are the ways of non pharmacological care that can be applied to reduce cholesterol rate. This study aims to compare Soy Milk and avocado juice giving toward cholesterol rate in children with obesity in State Elementary School 1 and 2 of Katerban, Central Java Province, Indonesia. The study used quasi experiment design with non-equivalent control group framework. Samples of the study were 30 children taken by use purposive sampling. Soy Milk and avocado juice effective to reduce cholesterol level in obesity children (p value=0,000, p<0,05), but neither soy milk and avocado juice there’re no one that more effective to decrease cholesterol level (p value=0,902, p>0,05). 60% of respondent were male student age 11 years (36,7%). Father education were high. Soya milk and avocado juice are able to reduce cholesterol rate. Parents must give attention to children’s dietary intake to reduce cholesterol and obesity, also motivate them to do physical activity.

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