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All Journal Media Kesehatan Masyarakat Indonesia DeKaVe Health Notions Jurnal STIE Semarang (Edisi Elektronik) Jurnal Keperawatan Malang (JKM) Jurnal Manajemen Bisnis dan Kewirausahaan Budapest International Research and Critics Institute-Journal (BIRCI-Journal): Humanities and Social Sciences SEMAR Matriks Teknik Sipil Media Riset Akuntansi Auditing & Informasi VIGOR: JURNAL ILMU PERTANIAN TROPIKA DAN SUBTROPIKA Ocean Engineering: Jurnal Ilmu Teknik dan Teknologi Maritim Globe: Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan Konstruksi: Publikasi Ilmu Teknik, Perencanaan Tata Ruang dan Teknik Sipil
Wibowo Wibowo
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Religion Agriculture, Biological Sciences & Forestry Arts Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Dentistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Nursing Public Health Social Sciences

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PENGARUH DOSIS Trichoderma spp. DAN KOMPOSISI MEDIA TERHADAP PERTUMBUHAN BIBIT DURIAN (Durio zibethinus, L.) Wibowo Wibowo; Agus Suprapto; Murti Astiningrum
JURNAL VIGOR Vol 3, No 1 (2018): VIGOR: JURNAL ILMU PERTANIAN TROPIKA DAN SUBTROPIKA Vol.03 No.01
Publisher : Universitas Tidar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (126.201 KB) | DOI: 10.31002/vigor.v3i1.744

Abstract

The research studied the effect of dose Trichoderma spp. and composition media on growth durian seedling (Durio zibetinus, L.). Experiment conducted in August until Oktober 2016. Location of experiment in Perbotan, Kalisari, Tempuran, Magelang, Central Java. The latitude of 415 m above sea level, the soil type Latosol with a pH of 6,0. The research method used factorial experiment (3 x 4) are arranged in a complete randomized block design with three replications. The first factor was a goat manure of 1 : 0, 1 : 1, 1 : 2, and 1 : 3. The second factor was the Trichoderm spp. that was 0, 200 and 400 ml/plant. The result of the research a goat manure matter in 1 : 1 increased on lenght of shoots, fresh weight of shoots, dry weight of shoots, fresh weight of roots, and dry weight of roots. Most Trichoderma spp. 200 ml/plant increased on dry weight of shoots, fresh weight of roots, and dry weight of roots. Interaction a goat manure and Trichoderma spp. increased on dry weight of shoot, fresh weight of roots, and dry weight of roots.
Peran Kepuasan Dalam Membentuk Perilaku Petani Kopi Pada Dinas Pertanian Kabupaten Ngawi Wibowo Wibowo; Siti Fatonah
JURNAL STIE SEMARANG Vol 13 No 3 (2021)
Publisher : Sekolah Tinggi Ilmu Ekonomi Semarang

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Abstract

Penelitian ini merupakan penelitian kuantitatif yang bertujuan untuk mengetahui, menguji peran kepuasan dalam membentuk perilaku petani kopi pada Dinas Pertanian Kabupaten Ngawi. Teknik analisis yang digunakan adalah dengan menggunakan uji validitas dan uji reliabilitas, uji linieritas, analisis regresi, analisis jalur (Path Analysis), Uji t, Uji F, Uji koefisien determinasi dan analisis korelasi. Hasil Pengujian adalah kepercayaan dan Inovasi layanan berpengaruh positif dan signifikan terhadap kepuasan. Kepercayaan berpengaruh positif dan tidak signifikan terhadap perilaku petani kopi. Inovasi layanan dan kepuasan berpengaruh positif dan signifikan terhadap perilaku petani kopi. Hasil uji F dapat disimpulkan secara bersama-sama variabel kepercayaan, inovasi layanan dan kepuasan berpengaruh signifikan terhadap perilaku petani kopi. Hasil perhitungan nilai R2 total sebesar 0,945 dapat diartikan variasi perilaku petani kopi di Dinas Pertanian Kabupaten Ngawi dijelaskan oleh variabel kepercayaan, inovasi layanan dan kepuasan sebesar 94,5%. Pengaruh langsung kepercayaan terhadap perilaku petani kopi menghasilkan nilai lebih kecil dibandingkan pengaruh tidak langsung. Sehingga lebih efektif melalui jalur tidak langung. Pengaruh langsung inovasi layanan terhadap perilaku petani kopi menghasilkan nilai lebih besar dibandingkan pengaruh tidak langsung. Sehingga lebih efektif melalui jalur langsung.
Kajian Setting Time dan Permeabilitas pada Beton Variasi Limbah Granit Sebagai Subtitusi Parsial Agregat Kasar Fauzy Kurnain; Wibowo Wibowo; Endah Safitri
Globe: Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan Vol. 2 No. 3 (2024): Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/globe.v2i3.485

Abstract

Currently, infrastructure development is a priority of the Indonesian government which aims to improve the quality of life of the community and equitable distribution of infrastructure development. The need for concrete material as a construction material also increases in line with the increase in infrastructure development. The use of recycled aggregate materials, especially granite waste, is a promising option in sustainable infrastructure development. This study was conducted with the aim of knowing the effect of partial substitution of coarse aggregates using granite waste variations on the binding time and permeability of concrete. Experimental method was chosen in this research. The levels of granite waste used were 0%; 15%; 30%; and 45% by weight of coarse aggregate or gravel. The test specimens used for the concrete bond time study were fresh concrete poured into cube molds measuring 20 cm x 20 cm x 20 cm with a minimum height of 15 cm. Testing concrete bond time using a penetrometer tool. The test specimen for concrete permeability is a cube measuring 15 cm x 15 cm x 15 cm, totaling 12 pieces and tested with a Permeability Test Apparatus (Water Permeabilty Apparatus).The results showed that partial substitution of coarse aggregate with granite waste variation did not affect the setting time of concrete up to a certain level. Based on the results of the research conducted, the initial setting time and final setting time values of 0%, 15%, 30%, and 45% granite content variations fluctuate and the coefficient of determination (R2) value in linear regression is only 0.5 and 0.3. Partial replacement of coarse aggregate with granite waste has an effect on the impermeability of concrete which meets the requirements for medium aggressive impermeable concrete. Water pressure of 5 kg/cm2 for 72 hours applied to the concrete partial replacement of coarse aggregate with granite waste variation resulted in permeability coefficient values of 4.11 x 10-12 cm/s; 3.48 x 10-12 cm/s; 2.17 x 10-12 cm/s; and 3.25 x 10-12 cm/s. The minimum coefficient value of concrete with partial substitution of coarse aggregate with granite waste is obtained at 30% by weight of coarse aggregate. Granite, whose specific gravity is greater than gravel, produces denser and more water-resistant concrete.
Kajian Kuat Tarik Belah pada Beton Variasi Limbah Granit Sebagai Substitusi Parsial Agregat Kasar Diajeng Derrissyifa Salvia; Wibowo Wibowo; Endah Safitri
Konstruksi: Publikasi Ilmu Teknik, Perencanaan Tata Ruang dan Teknik Sipil Vol. 2 No. 3 (2024): Juli: Konstruksi: Publikasi Ilmu Teknik, Perencanaan Tata Ruang dan Teknik Sipi
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/konstruksi.v2i3.468

Abstract

The development of concrete making technology has developed rapidly nowdays, the innovations in terms of material use and workmanship. The implementation of construction work carried out today pays attention to aspects of strength, rigidity, and high durability, as well as sustainability. To support these two things, research can be carried out on making concrete using granite waste. The research method used in this study is an experimental method. The concrete mix design uses variations of granite waste with successive levels of 0%, 15%, 30%, and 45%. The test specimen used for tensile strength testing is cylindrical with a diameter of 15 cm and a height of 30 cm, the test uses 12 specimens where each variation uses 3 specimens. The test is performed when the specimen has reached the age of 28 days. The test specimen tested has met the planned compressive strength requirements at a concrete life of 28 days where the results are greater than 20 MPa. Results of testing the tensile strength of concrete variations of granite waste as a partial substitution of coarse aggregate with variations of granite waste of 0%, 15%, 30%, and 45% respectively; 2.43 MPa; 2.50 MPa; 2.97 MPa; and 2.78 MPa.
Kajian Keuletan pada Beton Variasi Limbah Granit Sebagai Substitusi Parsial Agregat Kasar Farhan Nuraziz; Wibowo Wibowo; Endah Safitri
Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim Vol. 3 No. 3 (2024): September: Jurnal Ilmu Teknik dan Teknologi Maritim
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/ocean.v3i3.2412

Abstract

Concrete is one of the most common construction materials used throughout the world. Concrete consists of three main components: cement, coarse aggregate, and fine aggregate. Coarse aggregate serves as the main structural component in concrete, providing strength and resistance to external loads. Currently, technological advancements in construction are rapidly progressing. Therefore, innovation in concrete production is necessary, one of which is recycled aggregate concrete. The aim of this research is to determine the effect of using granite waste as a partial substitute for coarse aggregate on toughness of concrete. The method used in this research is experimental method. In this study, the variation level of granite waste used in this study was 0%; 15% ; 30% ; and 45%. The objects used for this research are blocks with dimensions of 400x100x100 mm tested using a Universal Testing Machine. The results of this research show that the toughness value obtained from the results of toughness testing on concrete with varying levels of 0% granite waste; 15% ; 30% ; and 45% respectively, namely 1.9589 kNmm; 2.2362 kNmm; 2.4189 kNmm; and 2.2118 kNmm.
Co-Authors Agus Setiya Budi agus suprapto Andi Syam Haeru Andrew Giovanni Yustijanto Antonius Mediyanto Aries Munandar Brigitta Amelia Linardi Brilyan Gusmi Auliyaa Robbani Debby Novita Sari Delvi Maulana Diajeng Derrissyifa Salvia Dicky Apriawang Elizabeth Kurniasari Susanto Emir Ahmad Dharmawan Endah Safitri Eriszha Berti Navelia Eunike Narulita Sitompul Farhan Nuraziz Fauzy Kurnain Gishela Kristianna De Jong Hamidah Hamidah Harry Prihatmoko Hendro Aryanto Huesca Rashad Ivan Kristianto Gunawan Joko Triyono kevin julianto tejakusuma La Ode Nasrianto La Ode Rujunia Markus Koko Nur Budianto Michael Julian Wirawan Muhammad Afaza Muttaqin Muhammad Irsyad Aji Sutrasno Murtanto Murtanto Murti Astiningrum Nindya Annisa Sabrina Nur’arina Ardini Purnawan Gunawan Purwoko, Agus Rezha Renata Rika Febriani Rizki Syahrani Putri Ronald Adiguna Halim Sains Satria Nurkhasan Sebastian Hadi Santoso Sherli Pramudhita Hapsari Sonia Anggraini Saputra Stevanus Indraguna Sayono Sunarmasto Sunarmasto Supardi Supardi Syamsul Ph.D M.A. Hadi Wachidatun Nikmah Wahyu Hapsari Widarto Rachbini Widarto Rachbini Windayanti Windayanti Yessica Widyatama Oei Yuda Fadillah Yunita Yunita Zulfa Trisnasari