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PERBEDAAN KETERAMPILAN BERPIKIR KRITIS DAN HASIL BELAJAR FISIKA ANTARA SISWA YANG PEMBELAJARANNYA MENGGUNAKAN PENDEKATAN KONFLIK KOGNITIF DENGAN PENDEKATAN EKSPOSITORI (Studi Kasus pada Pokok Bahasan Impuls dan Momentum di Kelas XI SMA N 1 Lubuk Sikapin Emiliannur, Emiliannur; Ratnawulan, Ratnawulan; Hamdi, Hamdi
Jurnal Penelitian Pembelajaran Fisika Vol 1, No 1 (2012)
Publisher : Jurnal Penelitian Pembelajaran Fisika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.1234/jppf.v1i1.594

Abstract

The background of this research is a lack of physics concept understanding. The students who have not yet successed in applying information and knowledge logically, critically, creatively and innovately when making decisions. One of the solution for this problem is by implementating the cognitive conflict approach. The aims of this research are to: (1) investigate the differences cognitive conflict approach with expository approach to the physics learning achievement; (2) investigate the differences cognitive conflict approach with expository approach to student’s critical thinking skill; (3) investigate the relationship between critical thinking and physics learning achievement. This research was quasi experimental research which used Randomized Control Group Only Design. The population in this research is all of XI IPA SMA N 1 Lubuk Sikaping student listed in the 2010/2011 academic year. Samples were determined using cluster random sampling technique, and elected XI IPA 3 as the first experimental class and XI IPA 1 as the second experimental class. The data is collected through the learning achievement test and critical thinking test, and analyzed by t test and Pearson correlation techniques. The results of data analysis indicate that: (1) there is a significant differences of cognitive conflict approach with expository approach to the physics learning achievement, where the cognitive conflict approach can improve physics learning achievement higher than the expository approach; (2) there is a significant differences of cognitive conflict approach with expository approach to student’s critical thinking skill, where the cognitive conflict approach can improve student’s critical thinking skill higher than the expository approach; (3) there is a significant relationship between critical thinking and physics learning achievement. Keywords: Cognitive Conflict Approach, Expository Approach, Critical Thinking Skill, Physics Learning Achievement.
BANGKITAN PERJALANAN PADA PERUMAHAN BOUGENVLLE DI PALEMBANG Hamdi, Hamdi
PILAR Vol 5, No 2 (2011): PILAR 07032011
Publisher : PILAR

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Abstract

Transportation problems arise as an impact when the interaction among the system of land-use, transportation network and demand of mobility has no longer appropriate. The development of new residential housing complexes including other infrastructures facilities energize the change in land use, which is in turn affecting the transportation network and mobility. This research is aimed to model a trip generation produced by Bougenville housing complex. These informations then could be used as a guideline to make decision of infrastructure management in order to minimize transportation problems from this zone. Multiple regression (MR) analysis was used to develope a Bougenville’s trip production mode. The analyses proved that the parameter of family size (X1), motor-cycle ownership and household income (X4) played significance role on the model whilst car-ownership (X2) was otherwise. The combination of X1, X3 and X4 by using an MR analysis come up with R2 of 0.711. Hence, this model is chosen as trip production model to predict trip production of Bougenville residential housing.
ANALISIS PEMILIHAN METODE CAST IN SITU DAN PRECAST TERHADAP BIAYA PADA PEKERJAAN TEMPAT DUDUK TRIBUN STADION UTAMA JAKABARING PALEMBANG Hamdi, Hamdi; Hariyadi, Soegeng
TEKNIKA Vol 29, No 1 (2010): Teknika Desember 2010
Publisher : Politeknik Negeri Sriwijaya

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Abstract

Cost efficiency has become a major problem in many construction projects, especially on large scale of concrete work. Concrete work can be divided in two types; which are cast-in-situ and precast. However, cost efficiency, by using such method, can be achieved if the concrete work meet these criteria; large scale volume, typically in form and repetitive work needed. This research is aimed to analyze concrete work using cast-in-situ and precast methods based on cost approach. The data of this research was taken from field study based on real condition of the project of the Jakabaring Sport Center Stadium, Palembang, which was focused on the concrete work of sport stadium benches. The research concludes as follows; the overall cost efficiency of the production of precast concrete of Jakabaring Sport Center Stadium, Palembang versus that of cast-in-situ is 18,29% (Rp. 840.217.466,19-). The efficient point achieved when the volume of production of precast concrete is 382,1m3 with cost of Rp. 1.021.630.000,- (27,21% of total cost of precast concrete production cost).
AN ANALYSIS OF THE USE OF COLLOCATION IN STUDENTS’ WRITING Hamdi, Hamdi; Isyam, Amri; Fitrawati, Fitrawati
Journal of English Language Teaching Vol 1, No 2 (2013): Serie E
Publisher : Universitas Negeri Padang

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Abstract

Abstrak Penelitian ini bertujuan untuk mendeskripsikan penggunaan collocation dalam tulisan esai tiga sampai lima paragraf. Pola collocation yang di analisa dalam tulisan ini adalah verb + noun collocation dan adjective + noun collocation. Penelitian ini adalah penelitian deskriptif . Populasi penelitian ini adalah mahasiswa kependidikan semester tiga yang telah telah mempelajari Writing 2. Sampel penelitian ini adalah kelas KP2 tahun masuk 2011. Instrument penelitian ini adalah tes dimana responden diberikan sejumlah waktu untuk menulis sebuah esai tiga sampai lima paragraph. Hasil penelitian menunjukkan bahwa penggunaan verb + noun collocation dan adjective noun collocation berada pada level “good” dan “excellent”. Oleh karena itu, dapat disimpulan bahwa penggunaan verb + noun collocation dan adjective + noun collocation bukanlah masalah utama dalam esai tiga sampai lima paragraf mahasiswa semester tiga. Serta, dapat juga disimpulkan bahwa penggunaan verb + noun collocation lebih sulit dibandingkan dengan penggunaan adjective + noun collocation. Kata kunci : Collocation, writing, use of collocation
IDENTIFIKASI MINERAL MAGNETIK PADA TINTA KERING (TONER) Irvan, Muhammad; Bijaksana, Satria; Hamdi, Hamdi
EKSAKTA Vol 2 (2010)
Publisher : FMIPA UNP

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Abstract

Magnetite (Fe3O4) is one of the most important magnetic mineral for scientific and industrial purpose. The magnetic characterization from each mineral is depend on the  grain size. In this research, we have done a series of analysis to identify the presence of magnetite as Pigment or filler in industrial materials, this industrial materials were the toner from cartridge of Canon photocopy Type NP-1010 and Laser Printer’s of Hewlett Packard Type C3906F. We have done some characterization, the magnetic characterization and non-magnetic characterization.  In magnetic method, we measure anisotropy magnetic susceptibility (AMS), anisotropy of anhysteric susceptibility (AAS) and isothermal remanent magnetization (IRM). In non-magnetic method, we use scanning electron microscopy (SEM). The result of this analyze showed that the two materials contain of magnetite mineral with the grain size smaller than 0,1µm for toner from printer laser and 0,1µm - 0,2µm for toner from Canon photocopy. The results from SEM method showed the presence of iron oxide that we predicted as magnetite. The role of magnetite as pigment is fairly obvious provides the coloring (black, in a monochrome printer) that fills in the text and images, this pigment is blended into other material that is domination of carbon.   Keywords: magnetization, magnetic method, SEM, toner
STUDI FISIBILITAS SISTEM JARINGAN DISTRIBUSI AIR BERSIH DI DESA SUNGSANG KABUPATEN BANYUASIN Mukhlis, Mukhlis; Hamdi, Hamdi
PILAR Vol 7, No 1 (2012): PILAR 07032012
Publisher : PILAR

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Abstract

Sungsang Village placed in Musi River downstream, littoral terrain of Sumatra Island. Nevertheless, its inhabitant has difficulty in acquiring sanitary water. Existent water resources are still hampered by limited quantity and quality, as well as the costly price. Water Treatment Plant (WTP) at Sungsang Village which was provided by the authorities -applying ultrafiltration and reverse osmosis technology- could not be functioned since 2007 considering that operational funding inadequacies and unavailability of the water distribution systematization. This research aims to analyze feasibility on water distribution network system at Sungsang Village wchich is focused on the amount of investation needed. The analysis method in this study includes to observe the water needs aspects by conducting the water utilization survey at the household stratum, then to analyze technical aspect and finally to analyze the engineering economic aspects. There are two configuration alternative models, which are technically calculated and simulated using computer program. Subsequently, the whole of investments is evaluated in financial feasibility with certain criteria that have been determined. This research concudes that alternative I is more feasible than that of alterntive II.
PENCEGAHAN TERJADINYA PUKULAN AIR DALAM PIPA INSTALASI PLAMBING PADA SISTEM PENYEDIAAN AIR BERSIH Sudarmadji, Sudarmadji; Puryanto, Puryanto; Hamdi, Hamdi
PILAR Vol 7, No 2 (2012): PILAR 07092012
Publisher : PILAR

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Abstract

Pada sistem penyediaan air bersih, alat plambing dan perlengkapan plambing harus diberi aliran air minum dengan kualitas dan tekanan yang cukup agar dapat bekerja baik sesuai dengan standar pemakaian air yang dibutuhkan. Sistem distribusi air harus direncanakan sehingga dengan kapasitas dan tekanan air yang minimal, alat plambing bekerja dengan baik. Pada kondisi tekanan air yang rendah akan menimbulkan kesulitan dalam pemakaian air, alat plambing tidak berfungsi karena tidak dapat mengalirkan air, ada kecenderungan untuk menambah tekanan air dalam pipa, tekanan yang berlebihan dapat menimbulkan rasa sakit terkena pancaran air serta mempercepat kerusakan peralatan plambing, dan menambah kemungkinan timbulnya pukulan air. Penyebab pukulan air dalam pipa secara umum yaitu katup dihentikan secara mendadak akan menimbulkan gelombang tekanan, dan dalam pipa keluar pompa kolom air akan mengalir balik dan membentur kolom air sisanya yang lebih dekat pompa dan mengakibatkan pukulan air yang cukup kuat. Akibat pukulan air pipa instalasi mudah cepat rusak, peralatan plambing tidak tahan lama dan sambungan-sambungan pipa mudah bocor. Pencegahannya yaitu menghindarkan tekanan kerja yang terlalu tinggi, menghindarkan kecepatan aliran yang terlalu tinggi harus sesuai standar perencanaan, memasang dua katup bola pelampung dan memasang rongga udara sesuai dengan penempatannya pada instalasi plambing.
PENGARUH PENGGUNAAN CERUCUK TERHADAP DAYA DUKUNG TANAH TIMBUNAN PADA LAPIS TANAH DASAR (STUDI KASUS JALAN SOEKARNO-HATTA PALEMBANG) Hamdi, Hamdi; Sudarmadji, Sudarmadji
PILAR Vol 8, No 1 (2013): PILAR 08032012
Publisher : PILAR

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Abstract

Tanah lempung merupakan jenis tanah yang memiliki daya dukung rendah sehingga akan menghadapi masalah apabila tanah lempung ini menerima beban yang cukup besar. Hal ini menyebabkan tanah lempung tidak bisa diberi beban yang besar. Cara untuk mengatasi masalah ini bisa dilakukan dengan memberi urugan di atas tanah lempung itu. Tapi cara ini memerlukan biaya yang besar. Salah satu alternatif lain untuk meningkatkan daya dukung tanah lempung adalah dengan memberikan cerucuk yang ditusukan ke dalamnya. Penelitian yang dilakukan di Jalan Soekarno-Hatta dan Laboratorium Jurusan Teknik Sipil Politeknik Negeri Sriwijaya ditujukan untuk mengetahui seberapa besar pengaruh penggunaan cerucuk lapis tanah dasar terhadap daya dukung tanah timbunan. Metode yang digunakan yaitu dengan membandingkan nilai daya dukung tanah dengan cerucuk dan tanpa cerucuk. Percobaan di lapangan dan Laboratorium Jurusan Teknik Sipil Politeknik Negeri Sriwijaya dengan menggunakan alat CBR untuk menentukan kekokohan tanah atau daya dukung dari tanah lempung itu secara aktual dan rekayasa. Dari hasil percobaan dapat disimpulkan bahwa penggunaan cerucuk dapat meningkatkan kekuatan daya dukung tanah timbunan yaitu sebesar 11,413%. Penelitian ini diharapkan dapat menjadi masukan guna mengetahui seberapa besar pengaruh penggunaan cerucuk untuk meningkatkan kekuatan daya dukung tanah dasar terhadap daya dukung tanah timbunan.
PENILAIAN KONDISI BANGUNAN SEKOLAH PASCA GEMPA BUMI (STUDI KASUS PADANG PARIAMAN, SUMATERA BARAT) Hamdi, Hamdi; Sudarmadji, Sudarmadji
PILAR Vol 10, No 1 (2014): PILAR 10032014
Publisher : PILAR

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Abstract

Gempa bumi merupakan suatu fenomena alam yang tidak dapat dideteksi kapan terjadi dan berapa besar kekuatannya, serta akan menimbulkan kerugian baik harta maupun jiwa pada daerah yang ditimpanya. Disamping menimbulkan korban jiwa yang tidak sedikit, jumlah kerusakan infrastruktur seperti gedung, jalan dan jembatan dan juga bangunan perumahan penduduk serta fasilitas umum lainnya juga tidak sedikit. Kajian ini hanya akan membahas dampak gempa terhadap kerusakan bangunan sekolah, khususnya bangunan SMP yang tersebar di berbagai lokasi yang ada di Kabupaten Padang Pariaman, provinsi Sumatera Barat. Fokus kajian lebih ditujukan pada penilaian kondisi bangunan yang dilakukan dengan survey langsung dan dianalisa pembobotan untuk menentukan tingkat kerusakannya; rusak berat, rusak sedang dan rusak ringan atau roboh. Data yang digunakan dalam penelitian ini merupakan data skunder yang diperoleh dari hasil survey verifikasi kondisi kerusakan bangunan SMP di wilayah kabupaten Padang Pariaman provinsi Sumatera Barat. Hasil penilaian ini dapat dijadikan dasar penentuan besar-kecilnya biaya rehabilitasi yang dibutuhkan bagi setiap sekolah tersebut. Dari hasil analisis diperoleh bahwa dari 17 SMP yang disurvey, untuk ruang kelas 17.6% rusak ringan, 41.2% rusak sedang dan 41.2% rusak berat. Untuk bangunan perpustakaan, dari 17 sekolah yang disurvey, baru 12 sekolah yang memiliki ruang perpustakaan dengan kondisi 16,7% rusak ringan, 41,7% rusak sedang dan 41.6% rusak berat. Bangunan laboratorium sebanyak 13 SMP yang memiliki fasilitas laboratorium dengan kondisi 23% rusak ringan, 38.5% rusak sedang dan 38.5% rusak berat. Sedangkan untuk bangunan WC siswa sebanyak 18.75% rusak ringan, 18.75% rusak sedang dan selebihnya rusak berat atau roboh.
TANGKI SEPTIK DAN PERESAPANNYA SEBAGAI SISTEM PEMBUANGAN AIR KOTOR DI PERMUKIMAN RUMAH TINGGAL KELUARGA Sudarmadji, Sudarmadji; Hamdi, Hamdi
PILAR Vol 9, No 2 (2013): PILAR 09092013
Publisher : PILAR

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Abstract

Every day, family residential neighborhoods discard the waste water that should be stored and processed. Most of waste water management system still does not meet the health requirements, it still use local waste water treatment systems (on-site) like septic tanks, because central wastewater treatment (sewage) is still not widely available in Indonesia. The local system does not require a huge cost when compared to a centralized system. Implementation and operation of the local system is more simply. Problems frequently encountered on the local system : the capacity and dimensions of septic tank does not fit requirements; effluent and influent not specification, there is no air pipes; channel infiltration does not performed percolation tests, the location of infiltration is too close with shallow wells; the slope of the bottom of the tank is not enough and only with one room at a time so that when suck the mud will be smelled. Need for septic tank construction planning, use of materials and determination of the true capacity of the septic tank. Also planning further treatment of septic tank with a leach field using channel permeation or infiltration wells. After calculation based Planning Procedures Septic Tank With Infiltration System SNI: 03-2398-2002 by way of calculation, capacity and dimensions are smaller than the septic tank by way of the table. After that, drawing plan should be made complete and detailed.