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PROFIL PEMAHAMAN KONSEP OPERASI PECAHAN BENTUK ALJABAR SISWA KELAS VIII MTs BINA POTENSI SIS ALJUFRI TATURA PALU Syamsudin Syamsudin; Evie Awuy; Sukayasa Sukayasa
Aksioma Vol. 8 No. 1 (2019)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/aksioma.v8i1.201

Abstract

Abstrak: Penelitian ini bertujuan untuk mendiskripsikan pemahaman konsep operasi pecahan bentuk aljabar siswa kelas VIII MTs Bina Potensi Sis Aljufri Tatura Palu. Jenis penelitian ini adalah pene­litian kualitatif. Subjek dalam penelitian ini terdiri dari satu siswa berkemampuan tinggi, satu siswa berkemampuan sedang dan satu siswa berkemampuan rendah. Hasil dari penelitian ini yaitu saat menyajikan masalah, subjek berkemampuan tinggi, sedang dan rendah menuliskan hal-hal yang diketahui, ditanyakan dan menyajikanya kedalam bentuk matematika, namun subjek berkemampuan rendah salah dalam memahami masalah disebabkan karena kurangnya ketelitian dalam memahami masalah. Selanjutnya dalam mengklasifikasi pecahan bentuk aljabar, subjek berkemampuan tinggi dan subjek berkemampuan sedang mengelompokkan pecahan yang memiliki variabel dan pecahan yang tidak memiliki variabel. Kemudian dalam memberi contoh pecahan bentuk aljabar dan non-contoh dari pecahan bentuk aljabar, subjek berkemampuan tinggi menjelaskan jenis pecahan bentuk aljabar yaitu memiliki variabel dan koefisien, jika tidak memiliki variabel subjek berkemampuan tinggi menyata­kan hanya berbentuk pecahan biasa. Selain hal tersebut subjek berkemampuan tinggi juga menunjukkan dengan tepat yang merupakan pecahan bentuk aljabar. Kemudian dalam menangkap makna suatu masalah subjek berkemampuan tinggi, subjek berkemampuan sedang, menangkap suatu makna operasi penjumlahan, pengurangan, perkalian, dan pembagian pecahan suku-suku sejenis, dan subjek berkemampuan rendah menangkap makna penjumlahan dan perkalian pecahan serta subjek berkemampuan tinggi juga menangkap makna hukum kanselasi (penghapusan). Setelah menangkap makna, subjek menjelaskan kembali objek-objek, sifat-sifat dan fakta serta operasi-operasi tertentu yang digunakan atau dimanfaatkan. Subjek berkemampuan tinggi menjelaskan operasi yang digunakan disertai dengan alasannya dengan baik. Subjek berkemampuan sedang menjelaskan kembali operasi perkalian dan pembagian pecahan bentuk aljabar yang digunakan walaupun dalam proses pelaksanaannya subjek berkemampuan sedang masih belum memahami dengan baik konsep dari perkalian dan pembagian pecahan bentuk aljabar. Kata Kunci: Profil Pemahaman Konsep; Indikator pemahaman konsep; Operasi pecahan bentuk aljabar; Abstract: This research aims to describe understanding the concept of operation floating the form of algebra students VIII MTs Bina Potensi Sis Aljufri Tatura Palu. The kind of research this is qualitative research. The subject of study take consisting of one students high profile, one students medium profile and one students low profile. The result of this research that was when presents a question, the subject of high profile, while and low wrote known, and elaborated into the form of mathematics, but the subject of low profile wrong in understand a problem because of a lack of thoroughness in understanding problem. Next in the form of classifying floating algebra, the subject of high profile and subject of medium profile group the cracks having variable and crushed not having variable. later an example in the form of algebra fractions and not fractions example of the form of algebra, a type subject of high profile explains fractions namely the form of algebra having variables and coefficients, if not having variable the subject of high profile said only in floating ordinary. Besides this subject of high-profile also shows with appropriate constituting a fraction the form of algebra. Later in grasp the reality a problem the subject of high profile, medium profile, catch a sum meaning operation, reduction, multiplication, and division a floating, and subject of low profile grasp the reality sum and multiplication floating also arrested and subject of high profile meaning law kanselasi (removal). After grasp the reality, the subject of explain back objects, and the fact the properties of operations as well as certain of which are used of and used. The subject of high profile explain an operation used accompanied by the reason was well. The subject of medium profile explain back operation multiplication and division floating the form of algebra that used although in the process of the implementation subject the subject medium profile still not well understand the concept of multiplication and division floating the form of algebra. Keywords: profile of understanding the concept; Understanding the concept of indicators; operation form algebra
PENGARUH KEPEMIMPINAN DAN LINGKUNGAN KERJA TERHADAP KINERJA PEGAWAI PADA KANTOR KECAMATAN KARANGTANJUNG PANDEGLANG Via Febrianti; Ratu Erlina Gentari; Syamsudin Syamsudin
Sains Manajemen Vol. 3 No. 1 (2017)
Publisher : Universitas Serang Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (368.365 KB) | DOI: 10.30656/sm.v3i1.292

Abstract

This study aims to determine the effect of leadership and work environment to employee performance at the district office karangtanjung Pandeglang, independent variables in thisstudy are leadership and work environment and the dependent variable is the performance of employees.The study used qualitative and quantitative methods with descriptive research explansi level, associative ie for influence between the variables, the source data is primary data and secondary data in the form of a questionnaire. The study population of 33 people, and 33 samples were taken, and analyzed with SPSS version 20:00 Based on the results of this study concluded that 1) there is positive and significant correlation between leadership on employee performance, 2) there is no effect and no significant between work environment to employee performance, 3) there are significant positive and significant correlation between leadership and work environment to employee performance
ANALISIS PERSEPSI DAN KESIAPAN MASYARAKAT PANDEGLANG DALAM MENGHADAPI PELAKSANAAN KAWASAN EKONOMI KHUSUS (KEK) ZONA PARIWISATA TANJUNG LESUNG Nono Arief Rachman; Syamsudin Syamsudin
Sains Manajemen : Jurnal Manajemen UNSERA Vol. 4 No. 2 (2018): Sains Manajemen: Jurnal Manajemen Unsera
Publisher : Prodi Manajemen Fakultas Ekonomi dan Bisnis Universitas Serang Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (803.164 KB) | DOI: 10.30656/sm.v4i2.843

Abstract

PENGARUH RASIO CAR, NPL, LDR, BOPO, DAN NIM TERHADAP KINERJA BANK UMUM DI INDONESIA Dwi Priyanto Agung Raharjo; Bambang Setiaji; Syamsudin Syamsudin
Jurnal Manajemen Dayasaing Vol 16, No 2 (2014): Jurnal Manajemen Daya Saing
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/dayasaing.v16i2.2047

Abstract

This research is performed on order to test the influence of the variable Capital Adequacy Ratio (CAR), Non Performing Loan (NPL), Loan to Deposit Ratio (LDR), BOPO (Operating Expenses / Operating Income), and Net Interest Margin (NIM), to return on Asset (ROA). The sample used in the study were 120 bank in Indonesia in 2010 and 2011. The data analysis technique used is multiple linear regression, t-statistic and F-statistics test with a significance level of 5%. During research period show as variable and data research was normal distributed. Based on test, multicolinearity, heterosscedasticity and autocorrelation classic assumption deviation has no founded, this indicate that the available data has fulfill the condition to use multi linear regression model. This result of research show that variable CAR, NIM, and LDR positive significant influence toward ROA. Variable NPL and BOPO negative significant influence toward ROA. Prediction capability from these seven variable toward ROA is 78,7 % where the balance 21,3% is affected to other factor which was not to be entered to research model.
FAKTOR-FAKTOR YANG MEMPENGARUHI PRODUKTIVITAS PENGRAJIN MEUBEL ROTAN DI DESA TRANGSAN KECAMATAN GATAK KABUPATEN SUKOHARJO Suwarto Suwarto; Syamsudin Syamsudin
Jurnal Manajemen Dayasaing Vol 17, No 2 (2015): Jurnal Manajemen Daya Saing
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/dayasaing.v17i2.3785

Abstract

This study analylizes the influence wages and working experience on the productivity ofrattan furniture craftsmen in the village Trangsan Gatak District of Sukoharjo district. The population of this study were 170 craftsmen. While the study sample was 62 respondents. This study uses a random sampling technique. The results of multiple linear regression analysis showed no effect of dominant work experience. Hypothesis test results showed a significant influence on the productivity of craftsmen and work experience. The results of hypothesis testing is influenced by other factors, such as factors of discipline, safety, and security.
ISOLASI DAN IDENTIFIKASI SENYAWA KIMIA PENGHAMBAT ENZIM - GLUKOSIDASE DARI FRAKSI AIR DAUN SALAM (SYZYGIUM POLYANTHUM (WIGHT) WALP.) Danty Nur Alvionitasari; Lilik Sulastri; Yesi Desmiaty; Syamsudin Syamsudin; Partomuan Simanjuntak
PROSIDING SEMINAR KIMIA Prosiding SNKT Himpunan Mahasiswa Kimia FMIPA UNMUL 2021
Publisher : PROSIDING SEMINAR KIMIA

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Diabetes merupakan penyakit kronis dengan gangguan metabolisme akibat pankreas tidak menghasilkan cukup insulin yang ditandai dengan hiperglikemia. Terapi farmakologi yang digunakan untuk menurunkan kadar glukosa dalam darah salah satunya dengan menghambat kerja enzim -glukosidase sehingga menunda penyerapan glukosa di dalam saluranpencernaan. Penggunaan bahan alam yang memiliki potensi sebagai penghambat enzim -glukosidase adalah daun salam (Syzygium polyanthum (Wight) Walp.) yang secara empiris telah banyak digunakan sebagai obat tradisional oleh masyarakat. Tujuan penelitian ini adalah untuk mengetahui senyawa bioaktif dari fraksi air daun salam yangmemiliki aktivitas penghambatan enzim -glukosidase. Penarikan senyawa kimia dilakukan dengan maserasi serbuk daun salam dalam etanol 96%, kemudian ekstrak etanol dipartisi dengan etil asetat dan air. Ekstrak air difraksinasi dengan kromatografi kolom (SiO2 : i). CH2Cl2-MeOH = 10 : 1 ~ 1:1 ii). CH2Cl2 - aseton = 2 : 1 memberikan fraksi 2-1 mempunyai aktivitas penghambatan enzim α-glukosidase paling baik, dengan IC50 21,54 ppm. Identifikasi senyawa kimia menggunakan Liquid Chromathography Tandem Mass Spectrum (LC-MS/MS) memberikan puncak dengan kelimpahan terbesar dengan bobot molekul ion m/z 413 (M+1)+ yang diperkiraan senyawa kimianya adalah Stigmasterol.Kata kunci : Syzygium polyanthum, fraksi air, stigmasterol, enzim -glukosidase, LC-MS/MS
KARAKTERISTIK SENYAWA KIMIA PENGHAMBAT ENZIM α-GLUKOSIDASE DARI FRAKSI ETIL ASETAT DAUN TEH (Camellia sinensis (L) Kuntze) Lilik Sulasti; Yashinta Larasati; Yesi Desmiaty; Syamsudin Syamsudin; Partomuan Simanjuntak
PROSIDING SEMINAR KIMIA Prosiding SNKT Himpunan Mahasiswa Kimia FMIPA UNMUL 2021
Publisher : PROSIDING SEMINAR KIMIA

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Teh (Camellia sinensis (L.) Kuntze) adalah salah satu tanaman yang dapat digunakan sebagai inhibitor α-glukosidase. Penelitian ini bertujuan untuk mengetahui senyawa bioaktif dari fraksi etil asetat daun teh yang memiliki aktivitas penghambatan enzim α-glukosidase. Ekstraksi daun teh dilakukan dalam pelarut etanol 96% secara maserasi sebanyak 3 kali, kemudian dipartisi dengan etilasetat - air = 1 : 1. Ekstrak etil asetat difraksinasi dengan kromatografi kolom (SiO2; n-heksan-etilasetat 10 : 1 ~ 1 : 1) memberikan 10 fraksi. Fraksi 6 dimurnikan kembali dengan kromatografi kolom (SiO2; n-heksan - etilasetat = 8 : 1 memberikan 6 fraksi (Fr. 6-1 ~ Fr. 6-6). Hasil uji penghambatan enzim -gluksodase terhadap keenam fraksi menunjukkan bahwa fraksi 6-2 memberikan IC50 sebesar 4,52 ppm. Identifikasi senyawa kimia dalam fraksi 6-2 berdasarkan interpretasi data LC-MS-MS dan infra merah (IR) memberikan senyawa campuran yaitu m/z 194 (kafein); m/z 442 (epikatehin 3-O-galat); m/z 458 (epigallokatehin 3-O-galat dan m/z 620 (dichrostachine F).Kata kunci : inhibisi enzim a-glukosidase, Camellia sinensis (L.) Kuntze, epikatehin 3-O-galat, epigallokatehin 3-Ogalat, kafein, antidiabetes
Implementasi Corporate Governance Dan Peningkatan Kinerja Perusahaan Syamsudin Syamsudin
Benefit: Jurnal Manajemen dan Bisnis Benefit : Kumpulan Makalah Diskusi Dosen FE UMS Volume 15 No 2 Desember 2011
Publisher : Program Studi Manajemen Fakultas Ekonomi dan Bisnis Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/benefit.v15i2.1339

Abstract

Article describes the benefits of corporate governance, with the implementation of good corporate governance will improve the performance of the company, so the owner will get a return on investment. Good corporate governance will reduce risk, improve profits and firm value
Beban Masyarakat Adat Menghadapi Hukum Negara Syamsudin Syamsudin
Jurnal Hukum IUS QUIA IUSTUM Vol. 15 No. 3 (2008)
Publisher : Fakultas Hukum Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/iustum.vol15.iss3.art9

Abstract

The most common type of conflict involving indigenous people is the dispute  on the ownership of economic resources and cultural sites which are convicted  and is guaranteed as traditional indigenous rights. In this regard, indigenous people stand vis a vis with investors’ interest  which is usually safeguarded by state legal instruments. Indigenous people are shaky  in this kind of conflict, and in the factual cases, the process to weaken and destroy indigenous community has  been made through regulations, policies  as well as the real actions made by the government.
Pengujian Orifice Flow Meter dengan Kapasitas Aliran Rendah Ainul Ghurri; S.P.G. Gunawan Tisna; Syamsudin Syamsudin
JURNAL MECHANICAL Vol 7, No 2 (2016)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/mech.v7.i2.201610

Abstract

Orifice flow meter is used in many laboratory and industrial application due because of its simple design and low cost. The present research investigated an orifice flow meter operated in relatively low flow rate. Orifice plate is a metal plate, 10 mm width provided with bevel at inlet section. The diameter ratios (β) are 0.3, 0.4, 0.5, 0.6, 0.7, and 0.8, respectively. The experiment used water with flowrate range having Reynolds number between 6827,55 and 8004,72. The fluid is flown through the orifice plate. Pressure taps are used to measure pressure at upstream and downstream of the orifice plate. The actual capacity is directly measured at an outlet reservoir; while the theoretical capacity is calculated using modified Bernoulli equation with diameter ratio (β) within the equation. The results showed that the irrecoverable pressure drop decreased with the increase of flow capacity and the diameter ratio. The discharge coefficient of the orifice flowmeter ranged between 0.3 and 1.3.