On the Order of the Schur Multiplier of a Pair of Finite p-Groups

In 1998, G. Ellis defined the Schur multiplier of a pair $(G,N)$ of groups and mentioned that this notion is a useful tool for studying pairs of groups. In this paper, we characterize the structure of a pair of finite $p$-groups $(G,N)$ in terms of the order of the Schur multiplier of $(G,N)$ under some conditions.Comment: 11 pages, to appear in Journal of Advanced Research in Pure Mathematic

An Electronically Reconfigurable Patch Antenna Design for Polarization Diversity with Fixed Resonant Frequency

In this paper, an electronically polarization reconfigurable circular patch antenna with fixed resonant frequency operating at Wireless Local Area Network (WLAN) frequency band (2.4-2.48 GHz) is presented. The structure of the proposed design consists of a circular patch as a radiating element fed by coaxial probe, cooperated with four equal-length slits etched on the edge along x-axis and y-axis. A total of four switches was used and embedded across the slits at specific locations, thus controlled the length of the slits. By activating and deactivating the switches (ON and OFF) across the slits, the current on the patch is changed, thus modifying the electric field and polarization of the antenna. Consequently, the polarization excited by the proposed antenna can be switched into three types, either linear polarization, left-hand circular polarization or right-hand circular polarization. This paper proposes a simple approach that able to switch the polarizations and excited at the same operating frequency. Simulated and measured results of ideal case (using copper strip switches) and real case (using PIN diode switches) are compared and presented to demonstrate the performance of the antenna

IMPLEMENTASI MEDIA PEMBELAJARAN POWER POINT PADA KONSEP REDUKSI-OKSIDASI TERHADAP PENINGKATAN HASIL BELAJAR SISWA KELAS X SMA NEGERI 6 AMBON

Telah dilakukan penelitian pembelajaran pada konsep reduksi-oksidasi yang bertujuan untuk mengetahui peningkatan hasil belajar siswa melalui penerapan media pembelajaran power point  kelas X SMA Negeri 6 Ambon. Subjek dalam penelitian ini adalah siswa kelas X MIA1 SMA Negeri 6 Ambon semester genap Tahun Pelajaran 2018-2019. Pengumpulan data menggunakan teknik tes dan observasi belajar siswa. Dari hasil analisa data diperoleh bahwa hasil belajar siswa kelas X MIA1 telah mencapai kriteria ketuntasan minimal yaitu pada aspek kognif, afektif, psikomotor dengan nilai akhir yang diperoleh adalah kualifikasi sangat baik 3 siswa (14,09%), kualifikasi baik 14 siswa (66,66%), dan kualifikasi cukup 4 siswa (19,05%). Data pencapaian N-gain yang diperoleh yaitu 17 siswa (80,95%) mencapai kategori gain tinggi dan 4 siswa (19,05%) mencapai gain sedang. Hasil respon siswa terhadap pembelajaran menggunakan power point diperoleh presentase rata-rata sebesar 76,69% dengan kategori sangat baik. Oleh karena itu, dapat disimpulkan bahwa penerapan media pembelajaran power point memberikan hasil dan respon yang baik untuk hasil belajar siswa pada konsep reduksi-oksidasi dengan kriteria pencapaian n-gain yang diperoleh adalah 0,77

PENGGUNAAN MEDIA ISPRING dan POWER POINT PADA SUB KONSEP HUKUM - HUKUM DASAR KIMIA UNTUK MENINGKATKAN HASIL BELAJAR SISWA KELAS X SMA NEGERI 7 AMBON

This study aims to determine the learning outcomes of students in X grade of SMA Negeri 7 Ambon, after using Ispring media and power points in learning process. The population of this research is all students of  X grade, and the sample is X1 class consist of 17 students. Student learning outcomes data on sub concepts of chemical basic laws obtained through final tests, student worksheets (LKPD), affective assessment sheets, and psychomotor assessment sheets with the presentation of the results obtained by 1 student (5.88%) getting qualified very good, 5 students (35,29%) get good qualifications, 7 students (35,29%) get enough qualifications and 4 students (23.52%) with less qualifications. Learning outcomes show all students (100%) successfully reach the minimum completeness criteria (KKM) of 7

Critical gap analysis of merging sections at Kuala Lumpur middle ring road

At merging sections, drivers normally slow down and sometimes need to stop while seeking a suitable gap before merging with the mainstream. Thus, there will always be several observed rejected gaps and an accepted gap which can be used to determine the smallest average gap, so-called critical gap. This study was carried out to determine critical gap values at selected merging sections at the Jalan Tun Razak and the DUKE Expressway uses the Maximum Likelihood method. Data were collected by using videotaping method and the gap acceptance data were extracted for analysis. A gap acceptance event at highway merging sections in this study was redefined due to unavailability of stopping vehicles at the ramp junction. Therefore, the gap data were estimated starting from a ramp’s vehicle passing the end of gore marking to where it merges with the mainstream. The analysis of the critical gap takes into consideration accepted gaps greater than 5 seconds to avoid forced entry due to lead impedance of successive vehicles on mainstream. The critical gap values obtained in this study, according to vehicle classification were ranged between 4.5 to 5.0 seconds, which are slightly smaller if compared to critical gap values for particularly left turn from minor movement at priority junction of the Arahan Teknik (Jalan) 11/87 and the United States Highway Capacity Manual 2000. The findings shall help to study driving behavior of local drivers, especially at priority control facilities such as merging sections

Kepercayaan Mahasiswa terhadap Kerajaan

The level of trust in government is important because its reflect the support of people to their government. The higher level of trust will give government more power to implement development to the country. Moreover, government that gain higher confidence from the people's can play their role effectively compared to the government who failed to gain support from them. This paper will discuss the level of trust among local universities students' in Malaysia. Their opinion is crucial because they are our future leader

Evaluasi Penyemenan Casing Liner 7” pada Sumur X-1 dan Y-1 Blok Lmg

Penyemenan primer merupakan hal yang mutlak dilakukan pada setiap sumur minyak dan gas.Mengingat pentingnya kualitas penyemenan primer maka harus memenuhi standar ketentuan yangberlaku. Apabila hasil dari kualitas penyemenan tidak baik maka semen tidak dapat menjalankanfungsinya sebagaimana mestinya. Seperti melindungi casing dari fluida korosif, menahan tekananformasi, dan sebagai media untuk jalur komunikasi antara formasi dengan sumur saat diperforasi.Evaluasi penyemenan pada casing liner 7” ini menggunakan peralatan logging yaitu Cement BondLog (CBL) dan Segmented Bond Tool (SBT). Hasil logging CBL-SBT dianalisa meliputi pembacaanamplitude, attenuation, cement map dan SBT wave. Dari hasil evaluasi penyemenan antara sumur X-1 dan Y-1 ditemukan perbedaan ikatan semen antara sumur X-1 dan Y-1 padahal sepanjangkedalaman casing liner 7” sumur X-1 dan Y-1 memiliki jenis formasi reservoir dan karakter reservoiryang sama serta dengan prosedur penyemenan yang sama terhadap kedua sumur tersebutseharusnya sumur X-1 dan Y-1 memiliki hasil penyemenan yang tidak jauh berbeda. Banyak faktoryang mempengaruhi kualitas dari hasil penyemenan, diantaranya: kondisi lubang bor, ketepatandalam perhitungan bubur semen baik aditif, total fluida, dan total sak semen, serta pengalaman dariahli penyemenan

Comparison Study On Pinch-Hitting Vibration Signal Analysis for Automotive Bearing: I-KazTM and I-Kaz 3D

Rotating machines are now an essential part of the automotive industry. Meanwhile, a bearing is playing the most important component of rotating machinery. To sustain the system's smooth running, maintenance methods such as preventive maintenance, breakdown maintenance, and predictive maintenance are used. Under preventive maintenance, vibration analysis is used to diagnose machines bearing faults. The main objective is to recognize bearing defects in a mechanical device by acquiring signals from the bearing using data acquisition hardware. This analysis is conducted under various load torque conditions, speeds, and defect types. A modular hardware configuration consisting of an accelerometer acquires the vibration signal. The signals are analyzed by using I-kazTM and I-kaz 3D signal analysis and its main objective is to observe the degree of dispersion data from its mean point.  This analysis resolves the issues associated with time domain analysis. This pinch-hitting analysis research was conducted in two stages.  The first stage is an experimental process that uses 3 types of bearings, the healthy (BL), inner race fault (IRF), and defect at outer race (ORF) bearing on the Machine Fault Simulator and forces with a different type of speed (1000, 1500 and 2500 rpm) and load variation (0.0564, 0.564 and 1.1298 N-m). In the second stage, computing the coefficient value and plots of signal’s I-kazTM and I-kaz 3D based on the bearings type were done accordingly. As a result, the analysis for detecting inner race fault, the deviation percentage averages calculation obtained the I-kazTM coefficient shows a better result with 96.86% by comparing to the I-kaz 3D that achieves 94.20%. Similarly, for the outer race defect, I-kazTM lead with 65.40% compared to I-kaz 3D with only 54.82%.  &nbsp