Articles
<![CDATA[Culture Differences of Indonesia Ethnic Minorities in Non-verbal Communication ]]>
<![CDATA[Roslidah, Navila]]>;
<![CDATA[Komara, Indra]]>
<![CDATA[ Jurnal Studi Komunikasi Vol. 1 No. 1 (2017) ]]>
Publisher : <![CDATA[Faculty of Communications Science, Dr. Soetomo University ]]>
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DOI: 10.25139/jsk.v1i1.60
<![CDATA[Indonesia’s islands are homes to a diverse ethnic and religious group which have given rise to a large number of cultural practices. Despite their cultural wealth, Indonesian Ethnic Minorities have been facing many problems regarding their cultural heritage existence. Most of their problems occur due to the inharmonious relationship between them and the government. Therefore, cultural approach is needed as a means to bridge the gap between the indigenous groups with the government by socialising the cultural aspects in the academic environment. By doing so, people from academic environment can take part in preserving those cultures by joining some performances, learning to play traditional instruments and raising awareness in the society. As a result, people in academic environment will have a chance to show the government that those cultural heritages need to be preserved. At the same time, the Ethnic Minorities will understand that there are some people who are aware of the cultural values. In the end, the Ethnic Minorities can work hand in hand with the government in the cultural preservation and development. Keywords: Culture, communication, Ethnic Minorities]]>
<![CDATA[A study on Cold-formed Steel Frame Connection: A review ]]>
<![CDATA[Komara, Indra]]>;
<![CDATA[Wahyuni, Endah]]>;
<![CDATA[Suprobo, Priyo]]>
<![CDATA[ IPTEK The Journal for Technology and Science Vol 28, No 3 (2017) ]]>
Publisher : <![CDATA[IPTEK, LPPM, Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j20882033.v28i3.3223
<![CDATA[This paper is aimed to review the current researches on Cold-formed steel (CFS) structures, particularly for screw connections, welded connections, bolted connections and adhesive connections. Connection presents as a major parameter of the important elements for CFS framing system in order to attain its structural stability. The performance of different CFS connections is well-discussed in order to capture the behaviour of each type of connection. Based on the review assessment, the results highlighted that all types of connections except adhesive connections have shown the proper behaviour that can trigger the change of any design codes. Otherwise, adhesive connection is given several advantages that leads a novelty in the construction technology. Hence it still has some gaps of knowledge that are needed to be filled with comprehensive future researches.]]>
<![CDATA[The experimental study of the effect of screw and adhesive connection in the variation of cold-formed roof truss framing system ]]>
<![CDATA[Santoso, Wilman Adi]]>;
<![CDATA[Suswanto, Budi]]>;
<![CDATA[Wahyuni, Endah]]>;
<![CDATA[Komara, Indra]]>
<![CDATA[ IPTEK Journal of Proceedings Series No 6 (2018): International Conference on Advanced Engineering and Technology (ICATECH) 2018 ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j23546026.y2018i6.4874
<![CDATA[onnections with screws are used extensively to connect cold-formed steel (CFS) structural element, especially in the roof truss framing system. However, these connections cannot be relied upon to transfer loading due to the small thickness plates that result in more slender elements which are susceptible to local or distortional buckling and have low stiffness. Therefore, some improvements are made in this study by adding adhesive as the alternative connection. Three types of roof truss framing system are designed with a different connection, i.e. screw, adhesive and the combination of screw and adhesive. The study aims to investigate the behavior of frames connection through experimental studies with the given static load until the frame structure collapses, with attention to their initial (pre-slip) stiffness, elongation, and load-deformation capacity. As a result, the stiffness of adhesive connection given a lower value than screw connection. It is indicated of the delamination process, that the combination connection implied the better behavior with 50% screw reduction as well as increasing the load-deformation capacity with 69.7 mm, three times higher than the screw connection.]]>
<![CDATA[Culture Differences of Indonesia Ethnic Minorities in Non-verbal Communication ]]>
<![CDATA[Roslidah, Navila]]>;
<![CDATA[Komara, Indra]]>
<![CDATA[ Jurnal Studi Komunikasi Vol. 1 No. 1 (2017) ]]>
Publisher : <![CDATA[Faculty of Communications Science, Dr. Soetomo University ]]>
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DOI: 10.25139/jsk.v1i1.60
<![CDATA[Indonesia’s islands are homes to a diverse ethnic and religious group which have given rise to a large number of cultural practices. Despite their cultural wealth, Indonesian Ethnic Minorities have been facing many problems regarding their cultural heritage existence. Most of their problems occur due to the inharmonious relationship between them and the government.  Therefore, cultural approach is needed as a means to bridge the gap between the indigenous groups with the government by socialising the cultural aspects in the academic environment. By doing so, people from academic environment can take part in preserving those cultures by joining some performances, learning to play traditional instruments and raising awareness in the society. As a result, people in academic environment will have a chance to show the government that those cultural heritages need to be preserved. At the same time, the Ethnic Minorities will understand that there are some people who are aware of the cultural values. In the end, the Ethnic Minorities can work hand in hand with the government in the cultural preservation and development.Keywords: Culture, communication, Ethnic Minorities]]>
<![CDATA[Analisis Perilaku Material dan Komposisi Engineered Cementitious Composite : Review Studi ]]>
<![CDATA[Indra Komara]]>;
<![CDATA[Priyo Suprobo]]>;
<![CDATA[Faimun Faimun]]>;
<![CDATA[Data Iranata]]>
<![CDATA[ Cantilever: Jurnal Penelitian dan Kajian Bidang Teknik Sipil Vol 10 No 2 (2021): Cantilever ]]>
Publisher : <![CDATA[Department of Civil Engineering and Planning, Faculty of Engineering, Sriwijaya University ]]>
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DOI: 10.35139/cantilever.v10i2.103
<![CDATA[Engineered Cementitious Composite (ECC) concrete or micromechanical modeled concrete using analysis of a mixture of fiber and other added materials can produce a tensile strain capacity of up to three hundred to five hundred times compared to the strain capacity of conventional concrete. A review related to several studies that have been carried out previously on the properties of ECC and their constituent materials is presented in this paper. The behavior of the material is reviewed as an investigation parameter followed by determining the composition of the mixture, namely the effect of the water-cement ratio, the shape and length of the fiber and the addition of additives. The fiber volume fraction review was limited to between 2% to 3%, which resulted in outstanding tensile strain behavior. As it is known, ECC has an excellent capacity in terms of strain behavior which is accompanied by a large number of mico cracking patterns. ECC crack widths are usually predominantly less than 100 μm. ECC behavior is closer to that of steel which can bend or be ductile, whereas conventional concrete is brittle.]]>
<![CDATA[Evaluasi Kapasitas Struktur: Sistem Struktur Pelat dengan balok dan alternative struktur Flat Slab dengan Drop Panel ]]>
<![CDATA[Indra Yuwono Basuki]]>;
<![CDATA[Indra Komara]]>
<![CDATA[ Jurnal Teknik Sipil Vol 1, No 1 (2020) ]]>
Publisher : <![CDATA[Institut Teknologi Adhi Tama Surabaya ]]>
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DOI: 10.31284/j.jts.2020.v1i1.936
<![CDATA[Struktur beton bertulang dengan flat slab umumnya menjadi populer di sistem konstruksi bangunan untuk metode cor di tempat. Metode ini didukung oleh kolom tanpa menggunakan balok atau dengan penebalan area kolom. Konsep ini memberikan beberapa manfaat dalam konstruksi yaitu, kemudahan dalam konstruksi, fleksibilitas arsitektur dan mengurangi item pekerjaan. Akan tetapi, efektifitas struktur tersebut didukung dengan rendahnya kapasitas dalam menahan pengaruh beban gempa dan besarnya efek dari punching shear. Dalam penelitian ini, dua jenis sistem struktur akan dianalisayang, yaitu pelat dengan balok dalok dan flat slab dengan drop panel. Studi kasus diambil pada bangunan empat lantai, perpustakaan IAIN Madura, dengan bentang panel 6 m dan 7.2 m yang masing-masing menggunakan dimensi drop panel 2 m dan 1.5 m, akan dimodelkan ulang secara numerik menggunakan konsep rangka ekuivalen dan metode desain langsung menggunakan ETABS 2018. Pelatmenggunakan balok juga dianalisa sebagai pembanding dan evaluasi. Tujuan yang diusulkan dari penelitian ini adalah untuk menilai kinerja flat slab dan drop panel agar mendapatkan efektivitas parameter bangunan yang sesuai standar.]]>
<![CDATA[Technical Assessment Dampak Peledakan pada Bangunan Industri (Studi Kasus Dampak Ledakan Jalan Toll Terhadap Struktur Eksisting) ]]>
<![CDATA[Indra Komara]]>;
<![CDATA[Fitri Hardiyanti]]>;
<![CDATA[Fitria Wahyuni]]>
<![CDATA[ Jurnal Teknologi dan Manajemen Vol 4, No 1 (2023): January ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian kepada Masyarakat ITATS ]]>
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DOI: 10.31284/j.jtm.2023.v4i1.4155
<![CDATA[This paper illustrates the process of blast loading on the structure that is occurring from the work package of Toll Road Construction. The study provides some illustrations including the example of industrial building that is exposed to this load. The aim is to give a technical assessment of the blast loading on the area of the construction. The study is analytically assessed by a numerical modelling created in SAP2000 compared to evaluation of a pressure time history analysis. The result confirms as the initial evaluation that is considering as the behavior after explosion effect. Three different load categories classified by the charge mass of TNT, 10 kg, 100 kg and 1000kg are illustrated to accommodate findings and give a recommendation, to undatestand the structural behaviours. As a result, the structure is not collapsing even if the source of the explosion is near. The mass of 1000 kg is considered to destroy some structural elements and it needs to be taken caution for the further analysis.]]>
<![CDATA[Sulphate Resistance of Geopolymer Concrete Based on High Calcium Fly Ash ]]>
<![CDATA[Yuyun Tajunnisa]]>;
<![CDATA[Nur Achmad Husin]]>;
<![CDATA[Indra Komara]]>;
<![CDATA[Mochammad Ahdian Wildan Nafi]]>;
<![CDATA[Mitsuhiro Shigeishi]]>
<![CDATA[ IPTEK The Journal of Engineering Vol 9, No 1 (2023) ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian kepada Masyarakat ]]>
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DOI: 10.12962/j23378557.v9i1.a16235
<![CDATA[The inclusion of fly ash class C, which is widely available locally, can influence the progress of strength and durability qualities of geopolymer concrete when exposed to significant environmental conditions. Alternative geopolymer combinations appropriate for curing at ambient temperatures were employed to investigate the impacts of fly ash class C based geopolymer concrete. To react with fly ash class C, a combination of sodium hydroxide and sodium silicate alkaline activator was used. Fly ash class C was added as 20% of the total binder without using ordinary Portland cement. The durability of fly ash class C based geopolymer concrete in sulphate environments was tested. The changes in weight, length and compressive strength due to exposure in magnesium sulphate solution for different periods of time were determined. The test results demonstrate that fly ash class C based geopolymer concrete cured at normal temperatures has good resistance to sulphate attack. In general, inclusion of fly ash class C in geopolymer concrete improved strength and performed satisfactorily in sulphate environments when cured in ambient temperature.]]>
<![CDATA[Evaluasi Struktur menggunakan variasi tipe pelat lantai menggunakan evaluasi kapasitas: Studi kasus area kerja yang umum dipergunakan di Surabaya ]]>
<![CDATA[Dewi Pertiwi]]>;
<![CDATA[Indra Komara]]>;
<![CDATA[Yanisfa Septiarsilia]]>;
<![CDATA[Dita Kamarul Fitriah]]>
<![CDATA[ Jurnal Pensil : Pendidikan Teknik Sipil Vol 12 No 2 (2023): Jurnal Pensil : Pendidikan Teknik Sipil ]]>
Publisher : <![CDATA[LPPM Universitas Negeri Jakarta ]]>
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DOI: 10.21009/jpensil.v12i2.31492
<![CDATA[Improvement of the current construction of midrise to high-rise building in Surabaya relatively needs to be evaluated, especially for compact office building area, it is very challenging to have an optimal space to the structural system with facilitate a satisfactory capacity performance. This paper makes a comparative study of the effectivity of structural plate structure in the compact office building between conventional slab (M1), waffle slab (M2) and flat slab (M3). A typical 5-story reinforced concrete building structure is selected as a case study within 6 m symmetrically span for each model. The proposed method used in this study is based on empirical analysis followed by numerical evaluation using SAP2000. The step initiated by deriving an optimal alternative of various type of slab. This study aims to emphasize the benefits to the functionality of the structural system which more efficient in term of structural capacity and its performance. As the result, M1 and M3 offer a similar behaviour due to the reinforcement and design performance with high slab deformation compared to the M2. M2 present a lower slab deflection under the supported of waffle element with the result almost twice smaller than M1 and M3.]]>
<![CDATA[Investigation of Corrosion Resistance of Reinforced Concrete Structures with Varying Supplementary Cementitious Materials in Marine Infrastructure ]]>
<![CDATA[Puspasari, Aisyah Dwi]]>;
<![CDATA[Komara, Indra]]>;
<![CDATA[Setyawan, Hendry]]>;
<![CDATA[Susilo, Tri]]>
<![CDATA[ Journal of Applied Sciences, Management and Engineering Technology Vol 5, No 1 (2024) ]]>
Publisher : <![CDATA[Institut Teknologi Adhi Tama Surabaya ]]>
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DOI: 10.31284/j.jasmet.2024.v5i1.6183
<![CDATA[The degradation of concrete strength may occur due to extreme environmental factors such as sea or coastal areas. Those factors can decrease the durability level of concrete structure signified by the corrosion of reinforced concrete structure. The use of fly ash as a concrete mixture is expected to minimize corrosion in concrete structures. Since fly ash has small particles, it can fill small voids in concrete and minimize corrosive substances. The investigation parameters in this study employed two types of corrosion acceleration test modelling using a 15x15x15cm cube tested object with a concrete quality of 40 MPa. Meanwhile, fly ash involves classes F and C within the level of 20% as well as applied corrosion prediction by 10% and 20%. The addition of fly ash to the concrete mixture can reduce the mass loss of reinforced concrete. The maximum mass loss on a normal test object with a corrosion prediction of 20% was obtained at 18.22%, while a 20% corrosion prediction obtained the smallest value for the SCMFA-C test object at 17.04%. The 20% corrosion prediction obtained the largest distribution of 0.355 mm on the normal test object and the smallest distribution of 0.299 mm occurred on the SCMFA-F test object. Thus, the addition of fly ash to the concrete mixture can reduce the distribution of corrosion and mass loss in reinforced concrete.]]>
