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INDONESIA
PENELITIAN DAN KARYA ILMIAH
Published by Universitas Trisakti
ISSN : -     EISSN : -     DOI : -
Core Subject : Education,
Education
Arjuna Subject : -
Articles 6 Documents
 1 
Search results for , issue "Vol. 2 No. 1 (2017)" : 6 Documents clear
FAKTOR–FAKTOR YANG MEMPENGARUHI KINERJA PERUSAHAAN NON KEUANGAN YANG TERDAFTAR DI BURSA EFEK INDONESIA Trisnawati Trisnawati; Henny Setyo Lestari
JURNAL PENELITIAN DAN KARYA ILMIAH LEMBAGA PENELITIAN UNIVERSITAS TRISAKTI Vol. 2 No. 1 (2017)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/pdk.v2i1.2459

Abstract

This research is conducted to find the factor’s affecting firm performance of non financial listed in Indonesia Stock Exchange. The sample was taken from 101 companies in the last five years from 2010-2014. The dependent variable in this research is the firm performance measured by return on equity, while the independent in this research is leverage measured debt to equity, growth opportunity, firm size, and liquidity. The results show that there are negative and significant influence between research leverage to firm performance. There is also posifive and significant effect between firm size to firm performance. And there is no influence between growth opportunity and liquidity to firm performance.
KARAKTERISTIK BATUBARA FORMASI WARUKIN DALAM PEMBENTUKAN CBM DI WILAYAH KABUPATEN TANAH BUMBU, PROVINSI KALIMANTAN SELATAN Denny Suwanda Djohor; Harry Pramudito
JURNAL PENELITIAN DAN KARYA ILMIAH LEMBAGA PENELITIAN UNIVERSITAS TRISAKTI Vol. 2 No. 1 (2017)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/pdk.v2i1.2455

Abstract

Increasing world oil prices have a huge impact on national energy needs. Indonesia's economic growth requires the development of alternative energy sources based on 10 basin assessments in Indonesia, coal methane gas potential is estimated to reach 337 TCF of gas in place (Advanced Resources International, inc). The research location is located in the Basin of Asam-Asam,South Kalimantan. Targeted research on the Miocene Warukin Formation. The data used to evaluate Coal Methane Gas potential include surface geology data and coal sample analysis, as well as characteristics of regional anomaly bouger for South Kalimantan. The development of cleats and fractures in coal at the observation site can be classified into high-intensity vitamite-rich coal categories. Coal Warukin Formation has an average Rv value = 0.56% with standard deviation 0.02%. and is ranked in sub-bituminous coal rank. While for other Warukin Formation coal has an average Rv value = 0.58% and entered in rank (bit) bituminous coal with type of methane gas is the type of bio & thermogenic gas mixture. When viewed from the thick layer of coal and gas type, the Warukin Formation coal in the location of research is quite interesting when included in the coal resources of economical coal methane gas.
GEOHYDROTHERMAL MODEL OF ARJUNO, WELIRANG AND PENANGGUNGAN VOLCANOES EAST JAVA, INDONESIA Untung Sumotarto; F. Hendrasto; Wibagiyo Wibagiyo
JURNAL PENELITIAN DAN KARYA ILMIAH LEMBAGA PENELITIAN UNIVERSITAS TRISAKTI Vol. 2 No. 1 (2017)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/pdk.v2i1.2457

Abstract

Indonesia is a country having a high geothermal energy potential. The geothermal energy in Java island, as a volcanic row island, has been explored and produced. One of the area that has not been produced is volcanic area around Arjuno, Welirang and Penanggungan (AWP) located in East Java. Geochemical survey has been performed to explore a more detailed objective in exploring the potential resource of geothermal energy of this area. Chemical and isotopic analysis shows the maturity level of waters taken from water springs in the area. The immature water from the water springs is interpreted coming mostly from meteoric water which flows quite fast forming water springs around the area. Geohydrothermally, the water flows through porous and permeable volcanic rocks that receive heat from igneous rocks existing together in the area. The igneous rocks are flowing heat conductively from magma below the AWP volcanoes.
PERANAN Musca domestica SEBAGAI VEKTOR MEKANIK TELUR INFEKTIF Ascaris lumbricoides Suriyani Tan; Machrumnizar Machrumnizar
JURNAL PENELITIAN DAN KARYA ILMIAH LEMBAGA PENELITIAN UNIVERSITAS TRISAKTI Vol. 2 No. 1 (2017)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/pdk.v2i1.2454

Abstract

Muscadomestica (house fly) is an insect that is considered useless by humans although they lived very close to humans. Breeding site of flies in human or animal waste, the rubbish, or unorganic objects that have decayed greatly support their role as mechanical vectors. More than 20 species of flies have been reported as an agent of gastrointestinal diseases. The purpose of this study is to examnine the role of houseflies as mechanical vectors Ascarislumbricoides’seggs.The research sample was 500 house flies (Muscadomestica) captured in the Legok area. Houseflies were trapped by fly trap containing rotten fish meat and then stored at a temperature of 4 degree celcius. The samples were divided into six groups according to the sampling areas, crushed and checked directly by using a light microscope. Ascarislumbricoides eggs are not found in all groups of samples. The study concluded that Muscadomestica is not a mechanical vector of infective eggs of Ascarislumbricoides in Tangerang City, Banten Province.
PENGELOLAAN LANSEKAP VISUAL YANG BERKELANJUTAN DI KAWASAN WISATA BOGOR, PUNCAK, CIANJUR JAWA BARAT Nur Intan Mangunsong; Ina Krisantia; Rustam Hakim; Ida Bagus Rabindra
JURNAL PENELITIAN DAN KARYA ILMIAH LEMBAGA PENELITIAN UNIVERSITAS TRISAKTI Vol. 2 No. 1 (2017)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/pdk.v2i1.2458

Abstract

Visual landscape is very important to promote a tourist destination. In Indonesia, the tourist area lost much of its visual appearance due to rapid development occurs. Therefore, the visual quality of the landscape need to be identified and quantified. The aim of this paper is to identify and to quantify the quality of the visual landscape in the tourist area of Bogor, Puncak Cianjur. This study uses a method Visual Resources Assessment Procedure (VRAP) (Richard C. Smardon, James F. Palmer, Alfred Knof and Kate Grinde, 1988), counting the total of visual elements such as water, vegetation, land surface, user activity as well as other considerations. The result of the calculation to get that Cisarua subdistrict has a high visual quality value, while the value of quality attraction Cibodas Botanical Garden has the highest value .Visual Landscape Management a). Visual Landscape management Zone a. Cipanas District entered in the class 1 category including preservation in the management class. b. Cisarua entered in the third class catergory including partial retention in the management class. b) Visual Resources Management Strategies a. Scenic management objective majority to protect the resourcesb. Scenic management strategy following the creteria
INDUSTRI LAPIS LISTRIK OLEH KULTUR CAMPURAN MIKROALGA AIR TAWAR TERAMOBILISASI Mawar DS Silalahi; Astri Rinanti Nugroho; Melati Ferianita Fachrul,; Rositayanti Hadisoebroto; Laras Kurnia
JURNAL PENELITIAN DAN KARYA ILMIAH LEMBAGA PENELITIAN UNIVERSITAS TRISAKTI Vol. 2 No. 1 (2017)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/pdk.v2i1.2453

Abstract

Research has conducted as an alternative form of advanced treatment in order to eliminate copper (Cu2+) heavy metal contained in electroplating industrial wastewater. The process is conducted biologically by utilizing the ability of mixed cultures of freshwater microalgae immobilized. The purpose of this study was to determine the removal efficiency for copper (Cu2+) using microalgae single and microalgae cultures mixed, determine the removal efficiency for copper (Cu2+) using mixed cultures microalgae which immobilized by alginate, and determine the influence of temperature and initial concentration of wastewater on the efficiency removal of copper metal (Cu2+) by mixed cultures of the immobilized microalgae. Microalgae are isolated from Setiabudi Reservoir, and purified in order to obtain Ankistrodesmus sp and Chlorella sp. These biosorbents then immobilized by adding alginate to form beads with a diameter of ± 0.5 cm. Artificial biosorbent cultivated in a growth medium Phovasoli Haematococcus Medium (PHM) in a series of batch cultures. The study consisted of three phases, namely the determination of biosorbent mobile and immobilized, optimization of temperature variations (25oC, 30oC and 35oC), and optimization of the initial concentration of wastewater (3 mg/l, 5 mg/l, 10 mg/ l, 15 mg/ l, and 15 mg l) at pH 4 and 120 minutes contact time. These used biosorbent was a single microalgae Ankistrodesmus sp and Chlorella sp and mixed cultures consisting of microalgae Ankistrodesmus sp and Chlorella sp with 1:1 ratio. The results prove that the removal efficiency for copper (Cu2+) by mixed cultures of microalgae was higher than either mobile or single immobilized. Copper (Cu2+) removal efficiency was proof depend on temperature process and the initial concentration of the wastewater. The optimal removal of copper (Cu2+) with immobilized biosorbent occurred at 30 °C with an initial concentration of waste by 17.808 mg /l with a value of 82.54% ± 0.11 for Ankistrodesmus sp; 83.66% ± 0.15 for Chlorella sp; and 86.39% ± 0.34 for a mixed cultures.

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