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THE MASS MEDIA ROLE IN DISSEMINATING AGRICULTURAL INFORMATION TO VEGETABLE FARMERS IN LAMPUNG Sumaryo, Sumaryo
Jurnal Penyuluhan Vol 2, No 4 (2006): Jurnal Penyuluhan
Publisher : IPB

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Abstract

The objective of this study was to describe the role of mass media, especially television in disseminating agricultural information to vegetable farmers in sub-urban and rural areas. The sample of the study was 55 farmers, who were randomly selected from a 550 farmer population. The findings pointed out that farmers in general were not interested in the broadcasted agricultural programs, since the programs’ contents did not match their needs. Additionally, the farmers in the city of Bandar Lampung watched a lot more varieties of television programs than those resided in the West Lampung district.
MICRO-CRYSTAL STRUCTURE OF 57Fe15Cr25Ni0.32Mn0.96Si AUSTENITE STEEL AFTER 850°C-5H TEMPERATURE-QUENCHING TREATMENTS FOR HIGH TEMPERATURE MATERIAL APPLICATIONS Parikin, Parikin; Rudi, Rudi; Sumaryo, Sumaryo; Ahda, S
Jurnal Sains Materi Indonesia Vol 20, No 1: OCTOBER 2018
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (366.282 KB) | DOI: 10.17146/jusami.2018.20.1.5407

Abstract

MICRO-CRYSTAL STRUCTURE OF 57Fe15Cr25Ni0.32Mn0.96Si AUSTENITE STEEL AFTER 850°C-5H TEMPERATURE-QUENCHING TREATMENTS FOR HIGH TEMPERATURE MATERIAL APPLICATIONS. A serial austenite stainless steel, namely A2-type, has been synthesized by using casting technique at temperature more than 1250 °C in the induction furnace that used an electromagnetic inductive-thermal system. The steel is dedicated for structural component material in multi-purpose applications such as in high-temperature operating environments. So, the material must be resistant to mechanical loads, high temperature, corrosion and irradiation. In order to increase the strength of materials, temperature-quenching treatments are required in some cooling media. Mineral element was extracted from crude ores of Indonesian mines and commercial scrap materials, i.e: ferro scrap, ferro chrome, nickel, manganese, and ferro silicon; all of them in granular shape were prepared to alloy the steel. Titanium was not added to this austenite low carbon steel. The OES-chemical composition in %wt of the materials is 57%Fe, 15%Cr, 25%Ni, 0.34%C and less than 0.1% of impurities that comprised of: titanium, phosphor, copper, niobium and sulphur elements in the steel. X-ray diffraction pattern shows that ascast material had an fcc crystal structure with lattice parameter of 3.632 Å. Meanwhile, two of samples, i.e: annealing and oil quench, have strictly similar lattice parameter to that of air (normalizing) quench (3.580 Å). On the other hand, the lattice parameter of water quenched samples has a slightly lower lattice parameter than the ascast lattice , i.e. 3.587 Å. The peak shift of (111) and (200) -plane in the diffraction profile, is very significant, approximately 0.63 degrees between ascast sample and the last two samples. Ascast microstructure reveals that the austenite phase grains look large and describe an undeformed structure, with an average grain size of about 6 mm, while the annealed sample was larger. Air- and oil- quenched sample microstructures showed a fine grain which was very different to water quenched sample microstructure that showed a coarse grain. The viscousity (h) of the quenching medium had an important role in the formation of grain boundary, because the rate of decreasing temperature was heavily influenced by the diffusion of heat from the high to low temperature spaces.
EFFECT OF DUKEM INHIBITOR ON AISI 1010 IN THE SECONDARY COOLING SYSTEM OF RSG GAS Kusumastuti, Rahayu; Sumaryo, Sumaryo; Sriyono, Sriyono
JURNAL TEKNOLOGI REAKTOR NUKLIR TRI DASA MEGA Vol 20, No 2 (2018): JUNI 2018
Publisher : Pusat Teknologi Dan Keselamatan Reaktor Nuklir (PTKRN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1126.103 KB) | DOI: 10.17146/tdm.2018.20.2.4471

Abstract

The secondary coolant of RSG GAS is an open system whose components are easy to interact with oxygen from surrounding environment to initiate corrosion. Corrosion controls are usually done by adding inhibitors. Dukem inhibitors are one alternative substitute inhibitor that may be used in the secondary cooling system of RSG GAS. The purpose of this study is to find out the optimum dukem concentration that needs to be added to RSG GAS secondary cooling system and to understand the interaction phenomenon between dukem inhibitors and AISI 1010 material. The analysis of orthophospat content as an active compound in dukem inhibitors is done by FTIR and UV-vis spectrophotometer. The phenomenon of interaction between inhibitors and material is studied by FTIR, SEM and XRD. Corrosion test with potentiostat is performed to assess the optimal concentration of dukem inhibitor which should be added. From the results of FTIR analysis, it is known that the active compounds in dukem inhibitors are ortho-phosphate. The analysis using UV-vis spectrophotometer showed that orthophospat concentration is 4.2 ppm. The SEM analysis demonstrated the presence of an inhibitor layer, which is capable of masking the surface porosity. The AISI 1010 material has better corrosion resistance when inhibitor was injected to the coolant of 150 ppm. The corrosion rate decreased by by 45.20% from 10.95 mpy to 6.02 mpy. The type of dukem inhibitor is mixed type inhibitor. Visually, corrosion product was not formed in the AISI 1010 surface during immersed in the inhibitor solution but it is clearly adhered on surface when immersed in solution added by inhibitors. It can be concluded that dukem inhibitors can be used as inhibitors in RSG GAS secondary cooling systems.Keywords: dukem, inhibitor, corrosion, secondary cooling system, RSG GAS. PENGARUH INHIBITOR DUKEM terhadap proses korosi pada SISTEM PENDINGIN SEKUNDER RSG GAS. Sistem pendingin sekunder RSG GAS merupakan sistem pendingin resirkulasi terbuka. Komponen pendingin ini mudah berinteraksi dengan udara luar yang mengandung banyak oksigen sehingga dapat mempercepat proses korosi. Salah satu cara pengendalian korosi adalah dengan penambahan inhibitor. Inhibitor dukem merupakan salah satu alternatif inhibitor pengganti yang dapat di gunakan pada sistem pendingin sekunder. Tujuan dari penelitian ini adalah untuk mengetahui konsentrasi penambahan dukem yang optimal ke pendingin sekunder RSG GAS dan untuk mengetahui fenomena interaksi inhibitor dukem terhadap material AISI 1010. Analisis kandungan ortophospat sebagai senyawa aktif pada inhibitor dukem dilakukan dengan FTIR dan spektrofotometer uv-vis. Fenomena interaksi antara inhibitor dengan material di lakukan dengan analisis FTIR, SEM dan XRD. Uji korosi dengan potensiostat akan memberikan informasi konsentrasi optimium inhibitor dukem dan tipe inhibitor yang sebaiknya di gunakan. Dari hasil analisis FTIR diketahui bahwa kandungan senyawa aktif pada inhibitor dukem adalah senyawa orto-phospat. Analisis menggunakan spektrofotometer uv-vis memperoleh kadar ortophospat sebesar 4,2 ppm. Analisis SEM menunjukkan adanya lapisan inhibitor yang mampu menutupi porositas (spheroid) pada permukaan AISI 1010. Analisis XRD menunjukkan adanya komposisi produk korosi oksida FeO(OH) pada permukaan AISI 1010 jika tidak ditambahan inhibitor. Material AISI 1010 mempunyai ketahanan terhadap korosi yang lebih baik ketika inhibitor ditambahkan ke dalam pendingin sebesar 150 ppm. Hal ini terlihat dari penurunan kecepatan laju korosi sebesar 45,20%  dari 10,95 mpy menjadi 6,02 mpy. Analisis tafel menunjukkan inhibitor dukem merupakan jenis inhibitor campuran. Secara visual, produk korosi tidak terbentuk pada permukaan AISI 1010 ketika direndam dalam larutan inhibitor sedangkan produk korosi terlihat jelas pada specimen tanpa inhibitor. Dari penelitian ini dapat ditarik kesimpulan bahwa inhibitor dukem dapat digunakan sebagai inhibitor pada sistem pendingin sekunder RSG GAS. Kata Kunci : dukem, inhibitor, korosi, pendingin sekunder,  RSG GAS
KAJIAN PERANAN WANITA DALAM PEMANFAATAN LAHAN BAWAH TEGAKAN UNTUK TANAMAN UBI-UBIAN DALAM MENUNJANG EKONOMI KELUARGA DI TANAH LITOSOL Suryono, Suryono; Sumaryo, Sumaryo
Caraka Tani: Journal of Sustainable Agriculture Vol 23, No 1 (2008): March
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3140.279 KB) | DOI: 10.20961/carakatani.v23i1.13834

Abstract

Research executed in litosol land in Geneng Duwur, Nganti, Jenalas and Peleman Gemolong district, Sragen regency started on April to November 2007. This research used survey method with 25 respondents every village with random sampling. Data taken from respondent included cover strightened crop type, ubi-ubian crop type, wide farm ownership, and wide ubi-ubian crop, requirement of seed, fertilizer, lobor and crop.Result of research obtained strightened crop types are core, mahoni, acacia, angsana, while crop type of ubi-ubian are garut, ganyong, suweg/iles-iles. Mean wide farm ownership was 0,43 hectare, mean wide of ubi-ubian crop was 0,02 hectare, mean requirement of seed was 15 singk, mean requirement of fertilizer was 40 singk, mean requirement of labor 2,1 woman workday people and mean obtained counted 107 singk with value average IDR 69.550,00.
TANGGUNGJAWAB SOSIAL PERUSAHAAN DAN TINGKAT KEBERDAYAAN EKONOMI RUMAH TANGGA Sumaryo, Sumaryo
Jurnal Ekonomi Pembangunan: Kajian Masalah Ekonomi dan Pembangunan Vol 12, No 2 (2011): JEP Desember 2011
Publisher : Universitas Muhammdaiyah Surakarta

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Abstract

The objectives of the study are: (1) to identify the influence of CSR implementation toward the community behavior progress on their business, (2) to identify the influence of CSR implementation to the household economic capability, and (3) to formulate and to design strategy to improve the community business capability and their income. LISREL was used to formulate the Structural Equation Modelling of CSR implementation. The important results show: (1) facilitators’ competency and supporting factors are significantly influence to the community business capability, while individual characters and quality program do not significantly influence to the community business capability, (2) the community business capability does significantly influence to the level of houseold economic capability, (3) the “participative CSR” is recomemmeded as a model of CSR implementation.
TANGGUNGJAWAB SOSIAL PERUSAHAAN DAN TINGKAT KEBERDAYAAN EKONOMI RUMAH TANGGA Sumaryo, Sumaryo
Jurnal Ekonomi Pembangunan: Kajian Masalah Ekonomi dan Pembangunan Vol 12, No 2 (2011): JEP Desember 2011
Publisher : Universitas Muhammdaiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/jep.v12i2.198

Abstract

The objectives of the study are: (1) to identify the influence of CSR implementation toward the community behavior progress on their business, (2) to identify the influence of CSR implementation to the household economic capability, and (3) to formulate and to design strategy to improve the community business capability and their income. LISREL was used to formulate the Structural Equation Modelling of CSR implementation. The important results show: (1) facilitators’ competency and supporting factors are significantly influence to the community business capability, while individual characters and quality program do not significantly influence to the community business capability, (2) the community business capability does significantly influence to the level of houseold economic capability, (3) the “participative CSR” is recomemmeded as a model of CSR implementation.
PENGARUH PROSES NITRIDISASI TERHADAP SIFAT MEKANIS PERMUKAAN BAJA PADUAN RENDAH AISI 4340 S., Anthonius; S., Sulistioso G.; Sumaryo, Sumaryo
Jurnal Sains Materi Indonesia Edisi Khusus, Oktober 2006
Publisher : Center for Science & Technology of Advanced Material - National Nuclear Energy Agency of

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (169.533 KB) | DOI: 10.17146/jusami.2006.0.0.4941

Abstract

PENGARUH PROSES NITRIDISASI TERHADAP SIFAT MEKANIS PERMUKAAN BAJA PADUAN RENDAH AISI 4340. Baja paduan rendah AISI 4340 banyak digunakan sebagai bahan komponen mesin dan bahan komponen pengatur katup aliran gas pada pembangkit listrik yang pada pemakaiannya banyak mengalami gesekan atau aus. Untuk meningkatkan sifat mekanis bahan khususnya ketahanan aus, pada penelitian ini dilakukan proses pengerasan permukaan baja AISI 4340 dengan metode nitridisasi. Proses nitridisasi dilakukan dengan menggunakan tungku pemanas yang dialiri gas amonia (NH3) murni pada suhu 525 oC dan 550 oC selama 6 jam. Pengujian yang dilakukan adalah uji ketahanan aus, uji kekerasan, pengamatan strukturmikro dan penentuan fasa. Pada kedua suhu, sampel yang telah dinitridisasi mengalami peningkatan ketahanan aus sebesar dua kali sama seperti peningkatan kekerasan dua kali lebih besar dari kekerasan substrat. Strukturmikro sampel setelah di nitridisasi, pada permukaannya terjadi lapisan putih dengan ketebalan 10 µm dan dibawahnya lapisan difusi setebal 40 µm dan 50 µm masing-masing untuk suhu 525 oC dan 550 oC. Dari analisis X-Ray difraksi, fasa-fasa yang terbentuk pada permukaan sampel adalah fasa nitrida Fe3N, CrN dan terdapat juga oksida besi Fe2O3.