PurposeThis research aims to study the economic conditions of fishermen living in the coastal area of Kabupaten Pesisir Selatan.Design/methodology/approachThe method used is a descriptive analysis method supported by a participatory planning method. The importance of primary data is to understand deeply the real problems of fishermen in the field, collected by using a survey method such as field observations, in-depth interviews by gathering fishermen and related stakeholders in the area, undertaking forum group discussion, workshop and seminar. Secondary data are necessary to support the primary data analysis.FindingsThe results showed that there is an abundance of marine resources, but the economic condition of fishermen is far from expected. The income from fishing is not enough to feed their family's daily needs due to low catching productivity and raw fish selling price. The regency government and province do not have clear and concrete policies to resolve firmly and thoroughly the economic problems of fishermen living in the coastal areas.Research limitations/implicationsThis study succeeds in providing two breakthrough strategic policies to improve the economic conditions of fishermen, i.e. institutional and entrepreneurial innovations.Practical implicationsBoth strategic policies have a mutual relationship. Therefore, the implementations have to integrate with one another and be executed simultaneously in a single coastal area management system.Social implicationsBupati as a top policymaker in this region must take full responsibility for the successful implementation of these two strategic policies.Originality/valueProviding new ideas to solve the main problem of fishermen living in the coastal area in Indonesia.

Palm oil is the number one estate commodity and contributes the largest Gross Domestic Regional Bruto in West Sumatera Province. The current problem is the frequent occurance over-supply of fresh fruit bunches of palm oil owned by smallholders that exceed the demand from palm oil processing factories. The purpose of this research isto analyze the realization price of FFB sales at the collecting level, the realization of export sales prices of Crude Palm Oil (CPO), realization of kernel sales prices and government policies on the realization of FFB sales prices at smallholder and the Government policy in the future to increase the bargaining power of farmer of FFB in West Sumatra. Two data sources used are primary and secondary data. Primary data is obtained directly from independent smallholders and other stakeholders, the instruments that researchers use are direct interviews, questionnaires, field observations and focus group discussions. Secondary data used is time series data using the Error Correction Model (ECM) analysis method. The results show that the variable realization price of FFB sales at the Gatherer level, the realization price of export and local CPO sales, the realization of export and local kernel sales prices proved to have a significant effect on the price realization of FFB sales at independent farmers but government policies related to FFB pricing have not significantly affected prices sales realization at the level of independent smallholders. Through the process of monitoring and evaluation of policies that have been established before and determine the right strategy in the future, is one way that can be done by the government to improve the bargaining power farmer of FFB in West Sumatra province.

For areas with very hot and humid weather condition increased latent and sensible load are a major problem in cooling systems that will increase compressor work so that electricity consumption will also increase. Combined condenser with direct evaporate cooling will increase the heat removal process by using an evaporative cooler effect that will increase the efficiency of energy use. This paper presents the study of the use of evaporator cooling and condenser. This paper mainly calculated energy consumption in steam compression cooling systems and related problems. From the results of this study, the use of condensers with evaporative cooling, power consumption can be reduced to 46% and performance coefficient (COP) can be increased by about 12%, with 1,2 kW cooling capacity.

Akibat dari penurunan laju aliran massa pada bahagian hisap pada sistem pendinginan variable refrigerant flow (VRF), sistem aliran pendingin berkinerja buruk. Untuk meningkatkan efisiensi metode siklus injeksi uap digunakan. Dampak injeksi uap secara teoritis dieksplorasi dalam kajian ini pada berbagai tekanan menengah dan suhu lingkungan luar, dan temuan didukung oleh data eksperimen. Kapasitas pemanasan kompresor, daya input, koefisien kinerja (COP), dan efisiensi isentropik semuanya dipengaruhi oleh tekanan. Pada suhu sekitar yang rendah, peningkatan COP dengan injeksi uap sangat luar biasa. Dalam kajian ini, kinerja sistem pendingin dengan siklus injeksi dievaluasi, sistem dengan siklus injeksi ini menghasilkan peningkatan kapasitas pendinginan sebesar 3,26% dan rasio efisiensi energi (EER) sebesar 2,32%.

Sistem VRV adalah sistem HVAC multi-split yang mempertahankan porsi berbeda dengan memvariasikan volume refrigeran. Sistem ini mengontrol volume zat pendingin/refrigeran untuk efisiensi dan keandalan. Kajian ini bertujuan untuk mengidentifikasi elemen sistem VRV yang mempengaruhi faktor operasional dan kinerja. Studi sebelumnya sangat penting untuk pengembangan VRV skala besar di masa depan.