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Pengaruh Variasi Faktor Air Semen (FAS) Terhadap Kuat Tekan dan Porositas Beton Berpori Saputri, Desti; Mery Silviana; Irfan, Zu; Lindawati
Jurnal Perencanaan dan Penelitian Teknik Sipil Vol 5 No 1 (2026): Maret
Publisher : Universitas Iskandar Muda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55616/prince.v5i1.1157

Abstract

Porous concrete is a type of construction material designed with an open cavity structure, so it has the ability to pass and absorb water directly. This characteristic makes porous concrete very supportive of the implementation of sustainable drainage systems, especially in efforts to reduce surface water runoff and puddles. This study was conducted with the aim of analyzing the effect of variations in the Water Cement Factor (FAS) on the compressive strength and porosity of porous concrete, which are two main parameters in determining the performance of the material. The constituent materials of porous concrete in this study consist of Portland cement as a binder, coarse aggregate without the use of fine aggregate, and clean water. The variations of Water Cement Factor (FAS) used were 0.25; 0.30; and 0.35, each of which provided different characteristics to the resulting concrete. The test results showed a clear trend, namely the greater the FAS value, the lower the compressive strength of porous concrete, while the porosity value increased. At the Water Cement Factor (FAS) variation of 0.25, the average compressive strength was 6.79 MPa with a porosity of 25.18519%. Furthermore, at the Water Cement Factor (FAS) of 0.30, the compressive strength decreased to 5.30 MPa with a porosity of 36.54321%. The Water Cement Factor (FAS) of 0.35 produced the lowest compressive strength of 4.45 MPa, but had the highest porosity of 57.7778%. Based on these results, it can be concluded that the Water Cement Factor (FAS) of 0.25 is the most optimal variation because it is able to produce a good balance between compressive strength, porosity, and workability of porous concrete.
Analysis of 5G Standalone Security Against Man-in-the-Middle Attacks Using Sequence Number Desynchronization An Nisa; Sopian soim; Lindawati
JOURNAL OF INFORMATICS AND TELECOMMUNICATION ENGINEERING Vol. 10 No. 1 (2026): Issues July 2026
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jite.v10i1.18198

Abstract

The architecture of standalone 5G networks offers improved communication performance, but its authentication procedures remain vulnerable to eavesdropping threats. This research evaluates the system’s vulnerability to Man-in-the-Middle attacks and proposes comprehensive mitigation methods to address these security issues. Relying on Open5GS as the core network and UERANSIM as a simulator for base stations and user devices, testing was conducted in a virtualized environment. The methods used include traffic manipulation at the N2 interface to trigger desynchronization of the sequence number in the 5G-AKA authentication procedure. Experimental results show that packet interception successfully caused sequence number desynchronization, which directly led to authentication failure and device isolation due to Denial of Service. Additionally, network monitoring revealed that the HTTP/2 protocol displays customer data in plain text. In conclusion, Secure Socket Layer (SSL) encryption has proven effective as a mitigation method. With this integration, internal communication channels have been converted to a fully encrypted HTTPS format, preventing eavesdropping attempts. Furthermore, customer cryptographic parameters remain protected while keeping the operational overhead below acceptable limits.
Tahlīlu al-Ahktā’i al-Kitābīyyati Fī Darsi al-Imlā’ litilmīżāti al-Fashli al-Awwali Fī al-Madrasati al-Mutawasiţati ma’hadi tahfīẓi al-Qur’ān bi ma’hadi al-Amīni Al-Islāmiyya Prenduan Luthfatul Qibtiyah; Lindawati
al Mahāra: Jurnal Pendidikan Bahasa Arab Vol. 6 No. 1 (2020)
Publisher : Jurusan Pendidikan Bahasa Arab UIN Sunan Kalijaga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/almahara.2020.061.08

Abstract

Problem analysis is the process of identifying and interpreting linguistic problem made by students when learning a foreign language as a second language. Linguistic problem was found in all language skills, including writing skills. In practice, many students were doing some mistakes in writing as like morphological problem, syntax, and dictation. The purpose of this study is to analyze the forms of Imla problem and the causes of imla problem for students in 1st grade of Ma'had Tahfidz Al-Qur'an Al-Amien Prenduan Middle School and solutions to overcome these problems. This research is qualitative research, with a descriptive-analytic evaluative type. Data collection methods used were documentation and interviews. The data sources were documentation of the writing of 1st grade student of Ma'had Tahfidz Al-Qur'an Al-Amien Prenduan Middle School, imla instructor, and 1st grade student of Ma'had Tahfidz Al-Qur'an Al-Amien Prenduan. Data analysis techniques used in this study were data collection, problem identification, problem classification, problem explanation, and problem evaluation. The results of this study in imla writing problem were writing hamzah washal and qath'i, lam syamsiyah and qomariyah, alif layyinah, and tanwin fathah. While there were two factors for the occurrence of imla writing problems: 1) Internal factors: lack of understanding of the imla theory, poor hearing, unfocused, poor of  mufradat, and unable to distinguish letters, long and short. 2) External factors: unfavorable classroom conditions, teacher dictation, unclear teacher's voice and the teacher's explanation of the imla theory were not detailed. The effective solution to reduce these problems is Ishlah Mubasyir (direct improvement) and repeat the explaination for the wrong material.  
Co-Authors Abid Raif Rahmatullah Achmad Udin Zailani Ade Tutty R. Rosa Agus Purwoko Ahmad Tavip Baiturahman Alaisyi Ally Akbar Salim Alprida Harahap Amalia An Nisa Ani Fadmawaty Anto Anzilal Fauji Ari Wibowo Arief Suryono Arizah, Mila Aryanti Br. Ketaren, Nurjama'yah Clorina, Jesslyn Cuandra, Fendy Dadang Permana Daimon Syukri Defriani Dwiyanti, Defriani Dendy Syahrul Kamil Deta Mediana, Salwa Dewi Maya Sari Diana Chalil Edi Warsito Edwin, Vebby Amellia Efrianti, Rini Eka Wijayanti Elisabet Siahaan Emilia Hesti Enda Kartika Sari, Enda Kartika Endi Jamjuri etti sartina siregar Fadhli, Mohammad Fahril Sidik Alfarizi Fiona Gunawan Syahrantau Haiqal, Arya Hendawati Intan Kumalasari Iqbal IRDAWATI Irfan, Zu Irmawartini Isfenti Sadalia Iwan Setiawan Joey Jovianto Junita Kartika Sari, Endah Kelvin Luthfatul Qibtiyah M. Parawangsa M.Miskun Arrihussalam Maharani, Novera Kristianti Mahaza Mahyuddin Makbul, Ahmad MARNIATI Maulana, Utama Graha Mery Silviana Mhd.Buhari Sibuea Moch. Galdiaz Nugraha Prawira Mohammad Fadhli Muhammad Ali Faishal Muhammad Asrizal Muhammad Faisal Muhammad Farras Haidar Muhammad Ridho Muhammad Suryadindin Muhtadin Muklis Muthia Mutmainah Aprinelia Nadia Putri Nadya choirunnissa Nazwa Tiara Herdiani Ng, Irvin Nindrea, Ricvan Dana Ningsih, Elsa Agustia Nona Valentine Sirait Nurcinta Asih Nurhanifa Nurhanifa Nursarah Sahirah nuzulul isna isna Oktafiandi, Randu Oktarianto, Eddy Perangin-angin, Ratna Amenawati Permata, Nadiva Surya Pramudya Renaldi S. Pramudya Reynaldi Salim Purry Widiarko Rahma Rohimah Hinaffisah Rahmanta Rahmayani Raihan Ilyasah Reni Koja Rikandi, Meta Riviwanto, Muchsin Rizki Anugrah Munawar Rizkyanto, Ridwan Roeslan Djutalov Rohimat Ryan Ardiansyah Salmiah Sandi Dzulfikar Saputri, Desti Sari Arlinda Savira, Izza Aulia Shoddam Palah Sifa Nur Maisah Silviana, Mery Soim, Sopian Soim Sopian Soim Sopian Soim, Sopian Sri Utami Suksmerri Sulwan Permana Suprapto, Yandi Teuku Rihayat Valentini, Cynthia Viviani Wardani, Sari Warsito, Edy Warsito Wasludin Yayu Juita Agustina Tobing Yolanda, Triyana Yudhistira Gibran Yusrizal Zai, Immanuel Zakaria, Hadi Zamakhari, Ahmad