Articles

INTERNATIONAL COLLABORATION: UMJ AND UTM TEACHING PRACTICE PERSPECTIVES Iswan, Iswan; Aswir, Aswir
PROSIDING SEMINAR NASIONAL & INTERNASIONAL 2018: PROCEEDING 1ST INSELIDEA INTERNATIONAL SEMINAR ON EDUCATION AND DEVELOPMENT OF ASIA (INseIDEA)
Publisher : Universitas Muhammadiyah Semarang

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This paper reports on an international collaboration between two universities, one private university in Indonesia (Universitas Muhammadiyah Jakarta, UMJ) and one public and world class university in Malaysia (Universiti Teknologi Malaysia, UTM). Both collaborative action plans were implemented through projects in program development, faculty exchange, graduate student/teacher field experiences, pre-service student?s internship mentoring and also conjoined research in the area of a foreign/second language teaching and teacher development, and educational technology. Over a three-year period from 2015-2018 reported that UMJ, i.e Fakultas Ilmu Pendidikan (Faculty of Education) sent students for teaching practice to Fakulti Pendidikan UTM in four batches with 65 preservice students. In March 2018, UTM sent seven students to do internship program atUMJ. This collaboration commitment portrayed a smooth international partnership between universities and hoped to be continued in other field of collaborations. Keywords: international collaboration, teaching practice program, UTM, UMJ
ANALISIS DAYA LEDAK TUNGKAI DAN KECEPATAN LARI 30 METER TERHADAP KEMAMPUAN LOMPAT JAUH PADA SISWA SMP NEGERI 5 BIROMARU Iswan, Iswan
Tadulako Journal Sport Sciences And Physical Education Vol 2, No 8 (2014)
Publisher : Tadulako University

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Rumusan masalah dalam penelitian ini adalah Bagaimana Daya Ledak Tungkai danKecepatan Lari 30 meter terhadap Kemampuan Melakukan Lompat Jauh Siswa putra SMPNegeri 5 Biromaru ? penelitian ini mempunyai tujuan untuk mengetahui Daya LedakTungkai dan Kecepatan Lari 30 meter terhadap Kemampuan melakukan Lompat Jauh Siswaputra SMP Negeri 5 Biromaru : Penelitian ini adalah penelitian deskriptif dengan teknikkorelasional dalam bentuk kontribusi, memberikan gambaran umum tentang variabel-variabelyang diteliti, melalui nilai kontribusi antara variabel bebas dengan variabel terikat, populasiadalah keseluruhan individu atau objek yang ingin diteliti. Olehnya itu yangmenjadi populasi dalam penelitian ini adalah siswa putera SMP Negeri 5Biromaru, dengan jumlah 274 orang, dengan rincian siswa puteri 141 orang dan putera 133orang. Sampel adalah bagian dari populasi. Menurut Zuriah (2005:122), Bahwa ?teknikrandom sampling, didefinisikan sebagai pemilihan sejumlah subjek penelitian sebagai wakildari populasi sehingga dihasilkan sampel yang mewakili populasi?. maka sampel merupakansebagian jumlah populasi yang diambil secara acak karena populasi mempunyai sifathomogen. Sampel dalam penelitian ini adalah siswa putra SMP Negeri 5 biromaru sebanyak20 orang.Dari hasil analisis data yang telah dilakukan terbukti ada kontribusi daya ledak tungkaidan kecepatan lari 30 meter terhadap kemampuan lompat jauh siswa putra SMP Negeri 5Biromaru. Hasil tersebut diatas menunjukkan bahwa daya ledak tungkai dan kecepatan lari30 meter dapat menjelaskan kemampuan lompat jauh, dimana 35,6% kemampuan lompatjauh dapat ditentukan oleh daya ledak tungkai dan kecepatan lari 30 meter. Hal tersebutapabila dikaitkan dengan kajian teori yang mendasari pada dasarnya hasil penelitian inimendukung teori yang ada. Hal ini membuktikan bahwa daya ledak tungkai dan kecepatanlari 30 meter merupakan unsur kondisi fisik yang sangat diperlukan dalam meningkatkankeberhasilan dalam melakukan lompat jauh, terutama menentukan baiknya proses dan hasilpelaksanaan lompat jauh.
Studi Daya Dukung Tanah Lempung Lunak yang Distabilisasi Menggunakan TX 300 Sebagai Lapisan Subgrade Jafri, Muhammad; Iswan, Iswan; Susmarani, Mirsa
Jurnal Rekayasa Vol 17, No 2 (2013): Edisi Agustus 2013
Publisher : UNIVERSITAS LAMPUNG

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Road construction requires good subgrade to put down parts of road pavement that it put downabove subgrade. However, soil can make problem if it has bad characteristic and loss, forexample high plasticity, low shear strenght, compression or volume change and large potensial ofswelling-shrinking. To overcome these, it is needed an improvement of soil that is called with soilstabilization use additive and one of them use TX 300 that come from America.Results of laboratory research show stabilization materials use TX 300 as stabilizing agent canimprove the physical and mechanical properties of soft clay soil. On physical test such as specificgravity and plasticity index, it decreased after stabilization. While the mechanical testing, usage ofTX 300 is effective enough in increasing the bearing capacity of soft clay soil. From the testresults of laboratory’s CBR, soil that has been stabilized with a mixture of the TX 300 can be usedas a subgrade for road construction due to CBR’s value ≥ 6 %.
PENANGGULANGAN LIMBAH PLTU BATUBARA Iswan, Iswan
DINAMIKA – Jurnal Ilmiah Teknik Mesin Vol 1, No 2 (2010)
Publisher : HALUOLEO UNIVERSITY

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Studi Analisis Penurunan Tanah Lempung Lunak Dan Lempung Organik Menggunakan Pemodelan Box Dan Matras Beton Bendrat Tanpa Tiang Putra, Riansyah; Iswan, Iswan; Setyanto, Setyanto
Jurnal Rekayasa Sipil dan Desain Vol 5, No 2 (2017): Edisi Juni 2017
Publisher : Jurnal Rekayasa Sipil dan Desain

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AbstractSoil clay have role that very important for something building civil especially in building and projects in whole indonesia. Development construction in soil clay will experience some obstacles as existence settlement and if soil given loading then will occurrence settlement that significant, will reduced volume soil so water pore exit and cause pressure water pore up so experience settlement on consolidation. Then from that need do research settlement that use box and mattress concrete bendrat without pole as tool land subsidence. For knowing how much big function from tool decline this could proven in laboratory with test soil clay in the box and burdened by concrete mattress bendrat and given loading, then do testing settlement or that called consolidation. Giving loading above surface permeability clay aim for look coefficient consolidation (Cv) compression index (Cc) changes in volume (Av) and the coefficient congestion volume (Mv). Result loading settlement clay that use modeling box and mattress bendrat without pole, soft clay soil experience decline 51% while organic clay soil experience decline 56%. Because of organic clay soil have value water content that more high. Research in prove that organic clay soil more fast experience decline compared with soft clay soil when given loading certain.Keywords : clay soil, concrete mattress box test and bendrat without poles, soil consolidationAbstrakTanah lempung memiliki peranan yang sangat penting bagi suatu bangunan sipil khususnya di gedung dan proyek-proyek di seluruh indonesia. Pembangunan kontruksi ditanah lempung akan mengalami beberapa kendala seperti adanya penurunan tanah dan apabila tanah diberi pembebanan maka akan terjadinya penurunan tanah yang signifikan, akan berkurangnya volume tanah sehingga air pori keluar dan menyebabkan tekanan air pori naik sehingga mengalami penurunan tanah secara konsolidasi. Maka dari itu perlu dilakukan penelitian penurunan tanah yang menggunakan box dan matrasbeton bendrat tanpa tiang sebagai alat penurunan tanahnya. Untuk mengetahui seberapa besar fungsi dari alat penurunan ini dapat dibuktikan dilaboratorium dengan menguji tanah lempung di dalam box dan di bebani oleh matras beton bendrat dan diberi pembebanan, kemudian dilakukan pengujian penurunan tanah atau yang disebut konsolidasi. Pemberian pembebanan diatas permukaan tanah lempung bertujuan untuk melihat koefesien konsolidasi (Cv) indeks pemampatannya (Cc) perubahan volume (Av) dan koefesien kemampatan volume (Mv).Hasil pengujian penurunan tanah lempung yang menggunakan pemodelan box dan matras beton bendrat tanpa tiang, tanah lempung lunak mengalami penurunan 51 % sedangkan tanah lempung organik mengalami penurunan 56 %. dikarenakan tanah lempung organik memiliki nilai kadar air yang lebih tinggi. Penelitian ini membuktikan bahwa tanah lempung organik lebih cepat mengalami penurunan dibandingkan dengan tanah lempung lunak ketika diberi pembebanan tertentu. Kata kunci : Tanah Lempung, Box Uji Dan Matras Beton Bendrat Tanpa Tiang, Penurunan Tanah
PENGARUH KUAT TEKAN DAN KUAT GESER SAMPEL DRYSIDE OF OPTIMUM (KERING OPTIMUM) DAN WETSIDE OF OPTIMUM (BASAH OPTIMUM) PADA TANAH LEMPUNG Afriani, Lumeilia; Iswan, Iswan; Febri, Armen
Jurnal Rekayasa Vol 19, No 3 (2015): Edisi Desember 2015
Publisher : UNIVERSITAS LAMPUNG

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Clay is a type of soil with low bearing capacity, the water is very large influence on the physical and mechanical behavior. Clay in the dry state optimum swell properties that are larger than the current optimum wet clay compacted. This is because at the time of clay in the dry state of opti - mum relative shortage of water so that the clay has a greater ability to absorb water. In experi - ments clay in dry conditions and wet optimum optimum useful to know the carrying capacity of the soil in dry and wet conditions. From the results of research conducted generate free compressive strength value (qu) and the value of cohesion (c) and the maximum shear strength soil in wet conditions the optimum moisture content, dry optimum and optimum. In optimum conditions produce the highest value for the com- pressive strength of free, direct shear strength and cohesion values. This is because the optimum conditions the maximum soil density, so that the soil is not easily mengemang. In dry conditions the optimum clay soil density unstable, so that the grains of soil are not mutually binding, whereas in wet conditions the optimum pressure on the grains of soil is very high, so that the soil has a high plasticity.
PENGARUH WAKTU PEMERAMAN TERHADAP DAYA DUKUNG STABILISASI TANAH LEMPUNG BERPASIR MENGGUNAKAN TX-300 Putra, Andius Dasa; Iswan, Iswan; Effendy, S
Jurnal Rekayasa Vol 18, No 3 (2014): Edisi Desember 2014
Publisher : UNIVERSITAS LAMPUNG

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Road is one of many things that support the development of construction at citties and villages. Not every soil can be directly used for road construction. Soil conditions in one area will not have the same soil properties with the other area. Some has a good bearing capacity and there’s also some with poor soil bearing capacity. This thing is very influenced by the type of the soil, so that on constructionis is requred a deeper understanding of the soil behavior analytically. In this research, the tested soil is study clay soil that diviced from Dusun kali ayu, Desa jadti baru, Kecamatan tanjung bintang, Kabupaten Lampung Selatan-Provinsi Lampung had been optimized with TX-300 with density of 2.49, water contents of 22.34 percent, 41.08 percent Liquit Limit, plastic limit of 31.92 percent and plasticity index of 9.15 percent. Mixed content of TX-300 that used was 1.2 ml and 6 kg soil sample for 0,7,14 and 28 day with unsoaked method. On physical examination like density and liquit limit increased after stabilized. While the mechanical examination, TX-300 is quite effective in increasing the bearing capacity along with the increasing of curing duration from 21.69% up to 25.92% in 28 days curing time. From CBR test result without soaking , the soil that has stabilized with TX-300 has a less effect in increasing the bearing capacity of the sandy clay soil compared with of stabilizing on soft clay soil.
Studi Kekuatan Batu Bata Pasca Pembakaran Dengan Menggunakan Bahan Additive Serbuk Gergaji Kayu Setyanto, Setyanto; Iswan, Iswan; Rahmad, Hari Diantoro
Jurnal Rekayasa Vol 19, No 2 (2015): Edisi Agustus 2015
Publisher : UNIVERSITAS LAMPUNG

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The Increasing construction in Indonesia and the number of population which is increasing every year must be supported by better economy growth. Thus, the construction materials will continue to increase to support the needs of infrastructure construction. To support the development and growth, then brick as a construction material will be needed. One of the method that can be used to improve the quality of the soil material is to use mixing ingredients (additives) such as sawdust to facilitate the combustion process and as a pore-forming on bricks. Based on the explanation above , it is necessary to do an objective study of making bricks, so that sawdust can be used as an right mix alternative in the manufacture of bricks, in the hope of sawdust waste is not wasted, but it can add power to brick and can produce bricks with good quality. Soil samples were tested in this study is a fine-grained soil from the Yosomulyo village, East Metro District, Metro City. Variations in the levels of the mixture used is 5%, 10%, 15% and 20%, with a curing time of 14 days as well with post-combustion treatment on the brick. Based on the results of physical testing of the original soil, USCS classified the soil samples as fine-grained soil and included in the ML group. This study used additive materials, such as wood sawdust mixture, on the mixture of 5% level, red brick experienced an escalation compared to bricks that are not mixed with additive materials. At the levels of a mixture of 10%, 15% and 20%, bricks decreased, both in terms of compressive strength and quality of bricks. So, in a mixture of 10%, 15% and 20%, the brick is not recommended for use as a building material because it does not fit to the requirements of SNI 15- 2094-2000 and water absorption rate is only 15% the level of compliance with the standards between 14% to with 18%.
Uji Kuat Tekan Paving Block Menggunakan Campuran Tanah dan Kapur Dengan Alat Pemadat Modifikasi Larasati, Diah; Iswan, Iswan; Setyanto, Setyanto
Jurnal Rekayasa Sipil dan Desain Vol 4, No 1 (2016): Edisi Maret 2016
Publisher : Jurnal Rekayasa Sipil dan Desain

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Paving blocks are widely used as a public building construction, especially for paving roads,yards, sidewalks, parking lots, etc. The use of materials such as paving block the main constituentof cement and sand is relatively expensive. So in this study will provide another alternative tousing a mixture of soil and lime.Soil samples tested were from Kota Baru, South Lampung, with variations in the levels of themixture used is 0%, 5%, 10%, 15%, and 20% and the curing time for 14 days, as well as with thetreatment without burning and burning which will then be tested compressive strength and waterabsorption.The results showed that the compressive strength occurs at the most optimal mix of 15% and adecline in a mixture of 20%. The addition of lime percentage ≤15% resulted in the addition ofcompressive strength of paving blocks, while the addition of lime percentage of 20% resulted in adecrease in the compressive strength of the paving blocks. The compressive strength withoutburning still not meet the specifications of SNI 03-0691-1996, while paving blocks with burningthe lime content of 15% is already included in the classification of the quality of D. Waterabsorption test values not meet the specifications of paving blocks SNI 03-0691-1996 whichranges from 3%-10%.Keywords : Paving block, kapur, kuat tekan, daya serap air
Pengaruh Variasi Waktu Pemeraman Terhadap Nilai Uji Kuat Tekan Bebas pada Tanah Lempung dan Lanau yang Distabilisasi Menggunakan Kapur pada Kondisi Optimum Hafizh Arrofiq, Abdil; Afriani, Lusmeilia; Iswan, Iswan
Jurnal Rekayasa Sipil dan Desain Vol 4, No 3 (2016): Edisi September 2016
Publisher : Jurnal Rekayasa Sipil dan Desain

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In this study used raw material such as silt and clay soil with a mixture of lime additive which has a variety of levels of 5%, 10%, and 15% as well as with a variety of curing time for 7 days, 14 days and 28 days.The purpose of this study to increase the compressive strength of silt and clay soil free them. Soil samples tested in this study represents silt soil from the village Yosomulyo, East Metro District, Metro City, while the clay is derived from Rawa Sragi, Jabung District, East Lampung regency.After doing research, from the third level, the compressive strength maximum free of silt and clay soil found in the levels of 15% with 28 days curing time. This is due to the greater levels of lime and the longer the curing time, the greater the unconfined compression value.Keywords: Clay Soil, Silt Soil, Unconfined Compression, lime.