Author: 4dm1n_b3r

http://repository.uhamka.ac.id/id/eprint/17245/

Implementation of moodle platform to acquire the students’ knowledge and science process skills

IRDALISA, IRDALISA

Teachers are demanded to design learning tools to develop students’ learning motivation. Limited and monotonous learning models or tools have been a common reason for students’ lack of interest in learning. This study aims at describing the benefits of learning tools, especially the Teacher’s Guidebook and Students’ Worksheets developed through the Moodle platform. Both were used to support the learning activities to acquire the knowledge dimensions and Science Process Skills in the excretory system concepts. This study employed a one-group pretest-posttest design. The population of this research was the eleventh-grade students. It involved 102 students taken by the purposive sampling technique. The research instrument employed tests and observation sheets. Data analysis used paired sample t-test and quantitative descriptive. The results showed that the student learning activities using the developed worksheet in the Moodle platform could be categorised as “very active”. The acquisition of students’ knowledge dimensions increased after using the developed Teacher’s Guidebook and Students’ Worksheets or in the medium category. It also significantly improves the students’ science process skills in the learning process. The improvement occurs in every aspect of science process skills, including observing, classifying, predicting, inferencing, hypothesising, interpreting data, planning experiments, and communicating.

http://repository.uhamka.ac.id/id/eprint/17245/1/cjes.v17i9.7349%20%281%29.pdf

Unduh!

http://repository.uhamka.ac.id/id/eprint/17252/

The development of mathematics higher order thinking skills
instrument for grade VIII junior high school

Wahidin, Wahidin

21st-century learning activities require higher order thinking skills including critical and creative thinking. High-level mathematical thinking skills are tools to train and improve higher order thinking skills in mathematics. This study aimed to produce products in the form of a high level mathematical thinking skills instrument of grade VIII based on Bloom’s Taxonomy containing C4 (Analyze), C5 (Evaluate), and C6 (Creating) questions. Indicators of higher order thinking include analyzing, organizing, differentiating, and linking. Evaluating is judging, checking and criticizing. While creating is generalizing, designing, and producing. This research was conducted at three junior high schools in Jakarta that consisted of 41, 36 and 36 students respectively. The sample of this research was grade VIII students. The study was conducted during the even semester in 2017. Data collection method used higher order thinking skill test of the eight grade students then analyzed data with the calculation of validity, reliability, difficulty level, and discrimination power. The result showed that the instrument was valid, reliable, the difficulty level was moderate, and the discrimination power was moderate so the problems in this instrument could be used by teachers to measure students’ high order thinking skills.

http://repository.uhamka.ac.id/id/eprint/17252/1/The%20development%20of%20mathematics%20higher%20order%20thinking%20skills%20instrument%20for%20grade%20VIII%20junior%20high%20school.pdf

Unduh!

http://repository.uhamka.ac.id/id/eprint/17243/

Homology Modeling Epitopes of Kirsten Rat Sarcoma (KRAS) G12D, G12V and G12R as Pancreatic Ductal Adenocarcinoma Vaccine Candidates

Yeni, Yeni

Pancreatic ductal adenocarcinoma (PDAC) is among the world’s deadliest cancers. Multiple studies demonstrated that PDAC is frequently characterized by the presence of Kirsten Rat Sarcoma (KRAS) G12D, G12V, and G12R protein mutants. The mutants are potential immunotherapy targets due to their potential as cancer-specific neoantigens. KRAS G12D, G12V and G12R contain vaccine-immunogenic epitopes. KRAS G12D, G12V and G12R epitopes were presented at major histocompatibility complexes (MHC) class I. The rational design of peptide vaccines to enhance the efficacy of cancer immunotherapy is facilitated by developing a peptide structural data library and knowledge of the MHC and antigen presentation processes. Before predicting peptide activity against MHC, homology modeling must transform the peptide into a three-dimensional structure. In this study, I-TASSER was used to perform homology modeling with the assistance of other applications. In silico methods for predicting epitopes to produce rationally designed peptide vaccines can increase the efficacy of these vaccines. This study yielded four epitope models that are potential PDAC vaccination candidates, KSFEDIHHYR, GIPFIETSAK, VVVGARGVGK and VVVGADGVGK.

http://repository.uhamka.ac.id/id/eprint/17243/1/24.%20Homology%20Modeling%20Epitopes%20of%20Kirsten%20Rat%20Sarcoma%20%28KRAS%29%20G12D%2C%20G12V%20and%20G12R%20as%20Pancreatic%20Ductal%20Adenocarcinoma%20Vaccine%20Candidates.pdf

Unduh!

http://repository.uhamka.ac.id/id/eprint/17220/

Optical Sensing Performance of Multimode Polymer Optical Fiber (POF) Coated with ZnO towards Methanol Vapour

Ramza, Harry

In this work, optical sensing performance of multimode polymer optical fiber coated with ZnO towards methanol vapour with different concentrations is studied. The etching process of the POF was carried out using chemical etching method. ZnO was synthesized with sol-gel method to obtain the sensitive material coating. The etched optical fiber was then dipcoated with ZnO and dried at 70oC to enhance the binding of the materials and to remove organic residue. Scanning Electron Microscope (SEM), and X-Ray poer Difraction (XRD)analyses were performed to characterize the ZnO layer. The measurements of optical performance were taken using a spectrophotometer in the optical wavelength in the range of 500–8000nm. The absorbance response of the ZnO coated etched fiber reduced proportionally, upon exposure to methanol vapour with concentration in the range of 5%–5

http://repository.uhamka.ac.id/id/eprint/17220/1/9-Optical%20Sensing%20Performance%20of%20Multimode%20Polymer%20Optical%20Fiber%20%28POF%29%20Coated%20with%20ZnO.pdf

Unduh!

http://repository.uhamka.ac.id/id/eprint/17241/

Hubungan pengetahuan dan sikap ibu dengan perilaku
pemberian ASI eksklusif: Studi Kuantitatif pada Fakultas Ilmu Kesehatan Masyarakat (IKM) Universitas Muhammadiyah Prof.DR.Hamka
(UHAMKA)

Waode, Erty Hikma

Tujuan dari penelitian ini adalah diketahuinya proporsi pemberian ASI
eksklusif pada bayi usia enam sampai 12 bulan di Wilayah kerja Puskesmas
Kecamatan Batauga Kabupaten Buton Provinsi Sulawesi Tenggara tahun 2015.
Penelitian ini menggunakan desai crosssectional dengan responden adalah ibu
yang mempunyai bayi usia enam sampai 12 bulan sejumlah 98 responden.
Penelitian dilakukan pada bulan agustus 2015. Hasil penelitian didapatkan
presentasen pemberian ASI eksklusif pada bayi usia enam sampai 12 bulan masih
rendah yaitu 51%. Faktor predisposisi yang berhubungan bermakna dengan
perilaku pemberian ASI eksklusif pada bayi usa enam sampai 12 bulan adalah
tradisi dan kepercayaan (p= 0,00) daan faktor pendorong yang berhubungan
berrmakna adalah dukungan keluarga (p=0,037). Hasil analisis multivariate
menunjukkan bahwa keterpaparan informasi merupakan faktor yang paling
dominan dalam hubugannya dengan perilaku pemberian ASI eksklusif pada bayi
usia enam sampai 12 bulan (p=0,001, Exp(B)= 0,188). Saran untuk Dinas
Kesehatan Kabupaten Buton Selatan adalah adanya pengawasan dari Dinas
Kesehatan Kabupaten Buton Selatan agar seluruh sarana kesehatan di Kabupaten
Buton Selatan menerapkan 10 langkah keberhasilan menyusui. Sedangkan untuk
Puskesmas Kecamatan Batauga disarankan agar selalu memberi penjelasan
kepada ibu hamil dan menyusui, suami ibu hamil dan menyusui, keluarga ibu
hamil dan menyusui tentang pentingnya dan manfaat pemberian ASI eksklusif.

http://repository.uhamka.ac.id/id/eprint/17241/1/SPS_IKM_1208046032_Waode%20Erty%20Hikma.pdf

Unduh!

http://repository.uhamka.ac.id/id/eprint/17223/

SINTESIS ARANG BATOK KELAPA MENJADI MATERIAL MAJU GRAFEN MENGGUNAKAN METODE REDUKSI KIMIA

Ramza, Harry

Penelitian ini merupakan bentuk kajian sederhana yang memanfaatkan biomassa pertanian yaitu batok kelapa yang disintesis menjadi material maju grafen. Grafen merupakan salah satu material maju dan terbarukan dalam bidang sains dan teknologi terkini karena kemanfaatannya yang multifungsi. Penelitian ini diawali dengan mengubah biomassa batok kelapa menjadi karbon melalui suatu reaksi pembakaran. Arang hasil dari pembakaran selanjutnya diberikan perlakuan dengan metode reduksi kimia atau metode Hummer tereduksi. Hasil penelitian ini memperlihatkan bentuk morfologi grafen berupa serpihan-serpihan atau dikenal dengan istilah grafen Flakes. Hasil ini terkonfirmasi melalui uji visualisasi SEM, dimana grafen Flakes diperlihatkan dalam formasi tumpukan mengindikasikan struktur multilayer. Hasil uji TEM memperlihatkan jarak antar kisi kristal yang dimilikinya yaitu berkisar pada 2,40 dan 2,46 Å. Berdasarkan pada data jarak antar kisi kristal tersebut, hasil simulasi energi menggunakan prinsip DOS didapatkan bahwan grafen hasil sintesis memiliki energi secara berturut-turut adalah 4,0 eV untuk level konduksi dan 3,3 eV untuk level valensi. Hasil uji optik sifat absorbansi dan fluoresens memperlihatkan grafen memiliki dua puncak serapan utama yang berkorelasi dengan terjadinya transisi energi pi-to-pi dan n − pi∗ dari bentuk ikatan C=C dan C-O-C. Adapun pendaran yang dihasilkan melalui uji fluoresensi adalah warna hijau dengan panjang gelombang 525 nm. Secara sederhanaran cangan penelitian dapat dikatakan telah berhasil dalam mensintesis grafen dari arang batok kelapa, meskipun belum sempurna dan masih perlu untuk dilakukan kajian kembali. Hasil dari penelitian ini selanjutnya akan dikembangkan lagi menjadi bentuk grafen dengan morfologi yang berpori.

http://repository.uhamka.ac.id/id/eprint/17223/1/Sintesis%20Arang%20Batok%20Kelapa%20menjadi%20Material%20Maju%20GrafenMenggunakan%20Metode%20Reduksi%20Kimia.pdf

Unduh!

http://repository.uhamka.ac.id/id/eprint/17224/

Towards the Compilation of the Global Twilight Pattern

Ramza, Harry

This paper summarizes ISRN’s 3-years research on the occurrence of dawn and dusk to mark the timings of the Fajr and Isha prayers. We acquired the astronomical data not only in Indonesia but also in Malaysia, the US, Egypt, and Turkey. It will be an attempt to compile a global twilight pattern in the future. The main instrument used is a Sky Quality Meter (SQM) that records the sky brightness data. For quality assurance, ISRN-UHAMKA employed dozens of imaging sensors ranging from an All Sky Camera, different types of DSLR, and gadget cameras. From hundreds of astronomical data, we have collected; it seems that the occurrence of the real twilight to mark the Fajr prayer throughout the world is the same. That is when the sun is at its depression angle of around 120-130. Likewise, the dusk to mark the end of the Maghrib prayer also occurs when the sun is at a solar depression angle around 120-130. Meanwhile, Muslims in the world use different solar depression angles ranging from -150 to 200 fields.

http://repository.uhamka.ac.id/id/eprint/17224/1/Towards%20the%20Compilation%20of%20the%20Global%20Twilight%20Pattern.pdf

Unduh!

http://repository.uhamka.ac.id/id/eprint/17225/

Penguji Disertasi a.n Muhammad Naim

Gunawan, Rudy

http://repository.uhamka.ac.id/id/eprint/17225/1/UNDANGAN%20UJIAN_2013.pdf

Unduh!

http://repository.uhamka.ac.id/id/eprint/17221/

Optical System Monitoring Based on Reflection Spectrum of Fiber Bragg Grating

Ramza, Harry

Abstract: Problem statement: This study presents fiber fault monitoring approaches for Fiber-to-the Home (FTTH) with a Passive Optical Network (PON). Current fiber fault monitoring approaches are difficult to be implemented due to its complexity and high loss as the amount of branches increase.
Approach: A fiber fault monitoring scheme is proposed whereas Fiber Bragg Grating (FBG) is placed on each branch of the Optical Network Unit (ONU). The advantages of the scheme are that it is simple, low cost and efficient in monitoring fiber fault in ONU. FTTH based network design is simulated using Optisystemtem 8.0 in order to investigate the feasibility of the proposed scheme. Results: The reflection spectrum of Fiber Bragg Gratings (FBGs) with different spectrum shape, frequencies and amplitude is used to differentiate each optical network. The simulation result shows that the unique characteristic of fiber Bragg grating is able to distinguish each optical network for a 20 km Passive Optical Network (PON) system. Conclusion: This study suggests the implementation of Fiber Bragg Grating that is placed in each network instead of using Optical Time Domain Reflectometer (OTDR) for fiber fault monitoring.

http://repository.uhamka.ac.id/id/eprint/17221/1/10-Optical%20System%20Monitoring%20Based%20on%20reflection%20spectrum%20of%20Fiber%20Bragg%20Grating.pdf

Unduh!

http://repository.uhamka.ac.id/id/eprint/17219/

Modeling and Optimization of Fiber Optic Chemical Vapor Sensor

Ramza, Harry

This paper discusses the application of Box–Behnken Design (BBD) to get a mathematical model for chemical vapor liquid detection with the objective of optimizing the optical fiber optic sensor probe. The parameters of input process were considered as variables to create the output parameters (response) using Response Surface Methodology (RSM). Input parameters such as length of probe, diameter of probe, photo-initiator liquid, vacuum pressure of chamber and purity of liquid detector were processed with Box – Behnken design approach for making POF (plastic optical fiber) probe of chemical sensor. Design Expert software was used to design the experiments with randomized runs. The main aim is to create an equation model as a platform for the probe design of POF chemical vapors detection similar to acetone, ethanol and methanol liquid. The experimental data were processed by considering the input parameters. The contribution of this research is the mathematic equation model that applies the polynomial equation. The final result of the wavelength application was between five to be three wavelengths, 434.05 nm, 486.13 nm and 656.03 nm. These wavelengths are the significant result of optimization measured using three chemical vapors. The optimization process uses the analysis of variables (ANOVA) to produce the quadratic model equation.

http://repository.uhamka.ac.id/id/eprint/17219/1/7-Modeling%20and%20Optimization%20of%20Fiber%20Optic%20Chemical%20Vapor%20Sensor.pdf

Unduh!