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STUDENTS’ ERRORS IN COMPILING GEOMETRIC PROOF OF GENDER: A GENDER COMPARATIVE STUDY Susanto, Hendra; Ikhsan, M.; Marwan, Marwan
Proceedings of AICS - Social Sciences Vol 8 (2018): the 8th AIC on Social Sciences, Syiah Kuala University
Publisher : Proceedings of AICS - Social Sciences

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Abstract

Mathematical proofing ability is important to learn because it is very influential on the ability of mathematics. The low ability of mathematical proofing is still a problem that is often encountered. Therefore, the low capability of the evidence needs to be explored to know the root of the more detailed problems to be used as initial data so that the solution becomes more precise and effective. Some researchers claim that gender differences also affect mathematical skills. This study aimed to determine the errors and causes in the proof of geometry regarding gender differences. This research was qualitative descriptive research conducted in the Department of Mathematics Education Faculty of Teacher Training and Education, Syiah Kuala University with subject consisting of male and female students. Techniques of collecting data were done through tests and interviews. Data analysis was done based on Miles and Huberman stages, namely data collection, data reduction, data presentation, and conclusions. The error data compiling the geometry proof was analyzed based on Newmann Error Analysis (NEA). The results showed that: 1) mistakes made by male students tend to Process Skill Error; 2) mistakes made by female students tend to Transformation Error; 3) the cause of errors due to the lack of understanding of the concepts (definition, theorem, illustrations, and usefulness) of the students, the lack of logical knowledge and the structure of the method of proof (the way of conclusion either direct or indirect evidence) limitations of language and notation, and lack of care in the settlement procedure.Keywords: students? errors, geometric proof, gender differences.
PENGARUH SARI SEDUH TEH HITAM (CAMELLIA SINENSIS) TERHADAP EKSPRESI IGF-1, ERK1/2 DAN PPAR PADA JALUR MAPK (MITOGEN ACTIVATED PROTEIN KINASE) JARINGAN LEMAK VISERAL TIKUS WISTAR DENGAN DIET TINGGI LEMAK Susanto, Hendra; Indra, M. Rasjad; Karyono, Setyawati
The Journal of Experimental Life Science Vol 2, No 2 (2012)
Publisher : Graduate School, University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jels.2012.002.02.05

Abstract

Prevalensi obesitas meningkat di berbagai Negara Asia Pasifik, Eropa, Amerika Serikat, Australia serta di negara-negara berkembang. Perubahan preadiposit menjadi adiposit yang mature memegang peranan dalam patogenesis obesitas. Teh hitam memiliki komponen antioksidan yang banyak berperan dalam pengontrolan proliferasi sel. Theaflavin pada teh hitam kemungkinan dapat menghambat perubahan preadiposit menjadi mature adiposit, maka prevalensi terjadinya obesitas sebagai pemicu berbagai penyakit metabolik dapat dicegah sejak dini. Tujuan penelitian ini untuk membuktikan pengaruh pemberian sari seduh teh hitam (Camellia sinensis) terhadap pencegahan peningkatan ekspresi IGF-1, ERK1/2 dan PPAR? pada tikus wistar dengan diet tinggi lemak. Penelitian dilakukan secara in vivo dengan menggunakan tikus strain wistar. Tikus dibagi menjadi kelompok kontrol positif dan kelompok perlakuan. Kelompok kontrol positif diberi diet tinggi lemak tanpa sari seduh teh hitam, sedangkan kelompok perlakuan diberi diet tinggi lemak dan sari seduh teh hitam dengan dosis 0,015 g, 0,030 g dan 0,045g/hari selama 90 hari secara bersamaan. Ekspresi IGF-1, ERK1/2 dan PPAR? diukur secara semikuantitatif dengan menghitung intensitas warna dengan Corell Photo Paint 11. Skor intensitas warna ekspresi IGF-1, ERK1/2 dan PPAR? hasil pewarnaan imunohistokimia dianalisis secara statistik dengan One way Anova dan analisis regresi dengan taraf  signifikansi p=0,05. Hasil penelitian  menunjukkan bahwa sari seduh teh hitam dengan berbagai dosis (0,015 g, 0,030 g dan 0,045 g/hari) dapat mencegah peningkatan ekspresi IGF-1, ERK1/2 dan PPAR? secara signifikan (p=0,000)  dibandingkan dengan kelompok kontrol positif. Semakin besar dosis teh hitam maka ekspresi IGF-1, ERK1/2 dan PPAR? makin rendah. Berdasarkan analisis regresi dengan estimasi kurva logaritmik (p<0,05) terdapat hubungan fungsional dua arah yang kuat antara ERK1/2 dengan PPAR? (R=0,798 dan R=0,780). Hasil penelitian ini membuktikan bahwa sari seduh teh hitam (C. sinensis) mampu mencegah peningkatan ekspresi IGF-1, ERK1/2 dan PPAR? pada tikus wistar dengan diet tinggi lemak.Kata kunci: diet tinggi lemak, IGF-1, ERK1/2, jalur MAPK, PPAR?, teh hitam.
PROFILIN MENGINDUKSI EKSPRESI TLR-11, IL-6, DAN TNF- SEBAGAI KANDIDAT PREDIKTOR DISFUNGSI ADIPOSIT AKIBAT INFEKSI TOXOPLASMA GONDII α Sudjari, Sudjari; Indra, M. Rasjad; Susanto, Hendra; Inggarwati, Lulik
Jurnal Kedokteran Brawijaya Vol 26, No 2 (2010)
Publisher : Fakultas Kedokteran Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jkb.2010.026.02.5

Abstract

ABSTRAKSindrom metabolik adalah sekelompok faktor risiko yang terdiri dari hipertensi, dislipidemia, gangguan intoleransi glukosa dan obesitas dan memiliki hubungan dengan pathomechanism penyakit jantung. Peran jaringan adiposa pada penyakit menular dan perubahan kualitas adipocyte setelah terpapar patogen belum terungkap. Di sisi lain, prevalensi penyakit infeksi di negara berkembang masih tinggi. Beberapa studi melaporkan bahwa ada hubungan antara infeksi T gondii dan fungsi  jaringan  adiposa.  Profilin  adalah  komponen  membran  T  gondii  yang  dapat  merangsang  ekspresi  sitokin proinflammation IL-12 dan lain sel dendrit melalui pengikatan dengan TLR-11. Ini dapat terjadi pada sel-sel lemak, memicu disfungsi adipocyte yang mengarah ke sindrom metabolik. Penelitian sebelumnya telah menyebutkan bahwa sindrom metabolik  yang  berhubungan  dengan  jaringan  lemak  selalu  disebut  lemak  visceral,  sedangkan  lemak  subkutan  juga berpotensi menjadi patogen. Penelitian ini adalah untuk membuktikan pengaruh paparan profilin untuk ekspresi TLR-11, IL-6, dan TNF-dalam kultur jaringan adiposa subkutan yang diukur dengan teknik ELISA. Hasil penelitian menunjukkan bahwa efek paparan profilin, dosis 5 15 dan 25 ng / ml peningkatan IL-6, dan TNF-tingkat, tetapi menurun tingkat TLR-11 (p = 0,000). Penelitian ini membuktikan paparan profiling menyebabkan disfungsi adipocyte melalui peningkatan tingkat adipocytokine proinflamasi sebagai patomekanisme sindrom metabolik yang berhubungan dengan jaringan adiposa.Kata Kunci : A  profilin Toxoplasma gondii, TLR-11dipocytokines (IL-6, TNF ?), adipose subkutan, disfungsi adiposit,
Antibacterial activity of Stichopus hermanii and Stichopus variegatus Methanol Extract Susanto, Hendra; Safithri, Mega; Tarman, Kustiariyah
Current Biochemistry Vol 4, No 2 (2017)
Publisher : Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/%p

Abstract

Since 500 years ago sea cucumber has been used as wound healing medicine. Sea cucumbers are thought to function as a cell growth factor and have the potential as an antibacterial agent. This study aims to determine whether the methanol extract of sea cucumber has antibacterial activity against Staphylococcus aureus and Pseudomonas aeruginosa so that it can be used to help diabetic wound healing of people infected with the same bacteria. The extraction method used was maceration with methanol to dried frozen simplicia. The simplicia was obtained by freeze drying to liquid preparation of heated fresh sea cucumber. The antibacterial activity test was performed using well diffusion method. There were no any antibacterial activity found in the two methanol extracts of sea cucumber.
PENGARUH PENGATURAN DEBIT INLET IPLC DENGAN PENURUNAN KADAR AMONIAK (NH3) PADA IPLC RSUD AJIBARANG KABUPATEN BANYUMAS TAHUN 2016 Susanto, Hendra; Subagyo, Agus; Rudijanto. IW, Hari
Buletin Keslingmas Vol 36, No 2 (2017): Bulletin Keslingmas Vol 36 No 2 Tahun 2017
Publisher : Poltekkes Kemenkes Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31983/keslingmas.v36i2.2962

Abstract

AbstractHospital liquid is the most potential resource of water pollution. The hospital wastes which containamoniac will cause several environmental problem such as eutrofikasi and an indication of organic mixturepollution which contain nitrogen. The goal of this research is to analizing the affect of IPLC RSUD Ajibarang. Inletdebit control with the decreation of amoniac rate at IPLC RSUD Ajibarang. The IPLC inlet debit control researchas 74,5 ltr/mnt, 68,5 ltr/mnt and 62,5 ltr/mnt. This kind of research is a pre eksperiment with pre and post testdesign approach. The collection of data been done by checking the amoniac rate of laboratory.The data presentedin table and structural narration. Data analization is using kruskal wallis statistik identification to identify thedifference of decreation amoniac rate with the control at inlet debit which is 74,5 ltr/mnt, 68,5 ltr/mnt and 62,5ltr/mnt.The result of the research gained is the rate amoniac IPLC RSUD Ajibarang with the control of inlet debitIPLC 74,5 ltr/mnt shown approximately 0,093 mg/ltr, inlet debit IPLC 68,5 ltr/mnt shown approximately0,075mg/ltr and inlet debit IPLC 62,5 ltr/mnt shown approximately0,050 mg/ltr. The edge point of amoniac is suitablewith the city regulation in Central Java Province No. 5 2012 at 0,1 mg/ltr. The test result is kruskal wallissignificant point at 0,000 < 0,05 (grade α) that lead Ho to an discharge of Ho or there is a decreation of amoniacrate with IPLC inlet debit control to IPLC RSUD Ajibarang liquid waste. Summarized by the researcherthat thereare significant decrease influence of amoniac rate at the control at IPLC RSUD Ajibarang inlet debit. The mosteffective to reduce amoniac rate is with the IPLC inlet debit 62,5 ltr/mnt. Suggested to the hospital’s Management toaccomplish the research result to reduce the amoniac rate in liquid waste
Adiposopathy In Vitro Study The Effect of Toxoplasma Gondii Profilin Induction To The Expression of IL-6 and TNF-a as A Predictor Candidate of Adipocyte Dysfunction on Subcutan Adipocyte Culture Sudjari, Sudjari; Susanto, Hendra; Indra, Rasjad
Research Journal of Life Science Vol 2, No 1 (2015)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (660.033 KB) | DOI: 10.21776/ub.rjls.2015.002.01.2

Abstract

Metabolic syndrome is a group of several risk factors consist of hypertension, dyslipidemia, glucose intolerance disorder, obesity, and has a relationship with CVD pathomechanism. WHO was report in 2003 more than 300 million adult in the world suffered from obesity. The role of adipose tissue in infectious diseases and adipocyte quality changes after exposure to pathogen has not been revealed. On the other hand, the prevalence of infectious diseases in developing country is still high. Previous studies proved a relationship between infection of Toxoplasma gondii and tissue dysfunction. Profilin is a membrane component of Toxoplasma gondii that able to stimulate expression of proinflammation cytokines through TLR-11 upregulation, and predicted able to trigger the adipocyte dysfunction. The aim of this study are to knows the effect of profilin exposure in vitro on subcutaneous adipocyte to the expression of IL-6 and TNF-α. The measurement of IL-6 and TNF-a levels was done by ELISA technique. The result showed profilin exposure doses 5, 15 and 25 ng / ml increasing IL-6. Profilin exposure cause adipocyte dysfunction through the increasing proinflammatory adipocytokine levels as pathomechanism of metabolic syndrome associated with adipose tissue.
Rancang Bangun Sistem Proteksi untuk Proportional Gate pada Mesin Packer saat Pressure Drop maupun Daya Listrik Mati Prayogi, Moch. Bagus; Tjahyono, Seto; Susanto, Hendra
Seminar Nasional Teknik Mesin 2019: Prosiding Seminar Nasional Teknik Mesin 2019
Publisher : Politeknik Negeri Jakarta

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Abstract

Rancang bangun ini bertujuan untuk membuat sistem proteksi untuk Proportional Gate (PG) pada mesin Packer semen PT. Solusi Bangun Indonesia pabrik Tuban. Proportional Gate sendiri merupakan alat pengatur buka-tutup pengisian material menuju mesin Packer. Kondisi abnormal yang dapat mengganggu kinerja Proportional Gate adalah Pressure Drop angin kompresor < 4 bar dan daya listrik mati tiba-tiba (Black Out). Pergerakan Proportional Gate dapat terganggu bahkan menyebabkan kemacetan pada sistem mekanikalnya. Gangguan tersebut dapat menyebabkan material meluap dari mesin Packer karena proses pengisian material menjadi tidak terkontrol. Dampaknya, proses produksi berhenti, kondisi berdebu, material mengotori area Packer, putaran mesin Rotary Packer terhambat akibat tumpukan material, serta membutuhkan waktu hingga 12 jam untuk pembersihan. Dari analisa Root Cause, diperlukan adanya sistem proteksi untuk mencegah gangguan tersebut terulang kembali. Analisis rancangan dilakukan untuk membuat desain sistem proteksi beserta komponen-komponennya sesuai dengan kebutuhan. Pengujian rancangan sistem proteksi dilakukan dengan simulasi pada aplikasi FESTO Fluidsim dengan beberapa kondisi Pressure yang berbeda.