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All Journal Tadulako Journal Sport Sciences And Physical Education Jurnal MEKANIKAL JURNAL KONFIKS Jurnal Onoma: Pendidikan, Bahasa, dan Sastra Journal of Educational Sciences IJRETINA - International Journal of Retina
Mohammad Tahir
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Religion Humanities Education Health Professions Languange, Linguistic, Communication & Media Library & Information Science Mechanical Engineering Medicine & Pharmacology Physics Public Health Other

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PENGARUH LINGKUNGAN KOMPOSIT SERAT SABUT KELAPA UNTUK APLIKASI BALING-BALING KINCIR ANGIN Bakri, Bakri; Chandrabakty, Sri; Alfriansyah, Alfriansyah; Tahir, Mohammad
Jurnal MEKANIKAL Vol 5, No 1 (2014)
Publisher : Jurnal MEKANIKAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (452.795 KB)

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Abstract: Environmetal Effect of Tensile, Modulus and Shear Strength of Coir Fibre Composite. The aim of this research is to know the environmetal effect of tensile, modulus and shear strength of coir fibre composite. In this research, coir is used as reinforcement and matrix uses epoxy resin. Coir is soaked in water with 5% NaOH during 24 hours. Composite is moulded with 17 % fibre volume fraction and 83% matrix volume fraction. Then, the tensile specimen used ASTM D638-02 and shear specimen used ASTM D5379 standard. Universal Testing Machine is used to test of these spesimens. The specimens of tensile and shear include without and with treatment to environmental influence during 10, 20, and 30 days. The result shows that tensile strength, modulus and shear strength  of  specimen treatment during 10, 20, 30 days are not significantly decreased   from  specimen without treatment. This result can be used as recommadation for material of wind blade for the future.   Keywords: composites, coir fiber, shear strength, tensile strength
PENGARUH LATIHAN TRICEPS STRETCH DAN MULTIPLE JUMP TO BOX TERHADAP KEMAMPUAN SMASH FOREHAND DALAM PERMAINAN BULUTANGKIS PADA SISWA PUTRA KELAS VIII SMP NEGERI 4 TOLI-TOLI Tahir, Mohammad; Mentara, Hendrik; Eka Wahyudi, Andi Sultan Brilin Susandi
Tadulako Journal Sport Sciences And Physical Education Vol 6, No 2 (2018)
Publisher : Tadulako University

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Tujuan penilitian ini adalah  untuk mengetahui pengaruh latihan triceps stretch dan multiple jump to box terhadap kemampuan smash forehand dalam permainan bulutangkis pada siswa putra kelas VIII SMP Negeri 4 Toli-Toli. Metode penelitian yang digunakan dalam penelitian ini adalah metode eksperimen dengan metode pengambilan sampel adalah purposive sampling. Teknik analisis data yang digunakan adalah rumus paired sample t-test. Hasil penelitian menunjukkan hipotesis yang menyatakan ada pengaruh latihan triceps stretch dan multiple jump to box terhadap kemampuan smash forehand dalam permainan bulutangkis pada siswa putra kelas VIII SMP Negeri 4 Toli-Toli diterima.
Comparison of oral rifampicin with observation alone in treatment of acute central serous Chorioretinopathy Anum Badar; Sadaf Khan; Sobia Usman Shah; Mohammad Tahir; Saman Babree
International Journal of Retina Vol 3 No 1 (2020): International Journal of Retina (IJRetina) - INAVRS
Publisher : Indonesian Vitreoretinal Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35479/ijretina.2020.vol003.iss001.103

Abstract

Introduction: A randomized control trial To compare efficacy of oral rifampicin in terms of drying of macula and decrease macular thickness with observation alone in patients of acute central serous Chorioretinopathy done in Layton Rahmatulla Benevolent Trust (LRBT) Free Eye and Cancer Hospital, Lahore from January 2017 to June 2017 Methods: After getting approval from hospital Ethical committee 140 patients of CSR were included in the study. The demographic details were noted and patients were randomized by lottery methods in two groups (group A& B). Group-A was observed for spontaneous resolution, routine treatment started if no improvement noted after 6 weeks of observation alone. Group B was given oral rifampicin 600mg per day for four weeks with liver function tests being done before commencement of treatment and after 2 weeks. Oral rifampicin was stopped if patient developed deranged liver function tests. Patients were followed up at 4 weeks for macular dryness and decrease macular thickness on optical coherence tomography(OCT). All the readings were carried out and noted by single person in order to minimize bias. Results: A total of 140 patents, 70 in each group, were included In study with mean age 38.77+7.74 in Group-A and 39.14+7.97 years in Group-B. regarding gender distribution 65.71 %(n=46) in Group-A and 613.43%(n=43) in Group-B were male. Comparison of outcome of treatment of acute central serous chorioretinopathy with oral rifampicin vs observation showed that 18.57 %(n=13) in Group-A and 41.43%(n=29) in Group-B had dry macula. Conclusion: We concluded that there is a significant difference in drying of macula in acute central serous chorioretinopathy with Rifampicin versus observation alone.
Adverbs Of Verbs In The Kaili Language, Ledo Dialect: A Study Of Structure And Semantics Rizki, Rizki; Mohammad Tahir; Syamsuddin, Syamsuddin
Jurnal Onoma: Pendidikan, Bahasa, dan Sastra Vol. 12 No. 1 (2026): Penulis pada Edisi ini Terdiri dari Enam (6) Negara: Indonesia, Malaysia, Chin
Publisher : Universitas Cokroaminoto Palopo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30605/onoma.v12i1.7415

Abstract

This study aims to examine the structure and semantic aspects of verbal adverbs in in the Kaili language, Ledo dialect (BKDL). Verbal adverbs are syntactic elements that function to limit, clarify, or emphasize the meaning of verbs in speech. This study is in the field of morphosyntax and regional language semantics. This study uses a qualitative descriptive approach with observation and conversation as data collection techniques. The analysis was conducted using matching and distributional methods to examine the morphological and syntactic structure, as well as a semantic approach to interpret the lexical and grammatical meanings of BKDL verb adverbs. The results show that morphologically, BKDL verb adverbs are divided into basic forms (monomorphemic) and derivative forms (polymorphemic), which are formed through affixation such as the prefixes {ma-}, {na-}, {mpa-}, {mpo-}, {njam-}, {njuma-}, suffixes {-na}, {-pa}, and confixes {ka-…-na} and reduplication can be pure reduplication (without affixes) or affixed reduplication, either with the addition of prefixes, suffixes, or confixes. The affixed reduplication forms in the BKDL data vary, including: prefix {ma-}/{na-} + basic reduplication (RD); prefix {njuma-} + RD; prefix {mpaka-}/{mpa-} /{mpe-} + RD; RD + suffix {-na}; prefix {ma-} + RD + suffix {-na}; as well as the prefix {ka- } + RD + suffix {-na }. Syntactically, verbal adverbs occupy the left position, right position, and free position in accompanying verbs at the phrase level. Semantically, ten types of meanings were found, namely quality, quantity, limitation, frequency, temporality, manner, negation, necessity, expectation, and uncertainty. This study fills a gap in the study of BKDL verb adverbs, which have not been extensively researched in terms of structure and semantics. These findings contribute to the systematic and scientific preservation and documentation of the richness of regional languages.
Directive Speech Acts of School Principals toward Teachers at SMA Negeri 1 Banawa: A Sociopragmatic Study Finarti, Finarti; Tahir, Mohammad; Agustan, Agustan
Journal of Educational Sciences Vol. 10 No. 3 (2026): Journal of Educational Sciences
Publisher : FKIP - Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jes.10.3.p.805-818

Abstract

This study examines directive speech acts used by school principals in educational leadership communication. It aims to describe the forms, functions, and social contexts of directive speech acts employed by the principal toward teachers at SMA Negeri 1 Banawa. This research adopts a sociopragmatic approach using a descriptive qualitative method. Data were collected through direct observation, interviews, and recordings of communication interactions between the principal and teachers in various situations, including meetings, coaching sessions, and informal conversations. Data analysis was conducted by identifying types of directive speech acts based on Searle’s theory and interpreting their social contexts through Leech’s politeness principle. The findings reveal that the principal’s directive speech acts take the forms of commands, requests, suggestions, prohibitions, and invitations. Their primary functions are to direct, regulate, and motivate teachers in carrying out their professional responsibilities. Socially, the use of directive speech acts is influenced by power relations, social distance, and communication settings. The principal consistently applies politeness strategies to maintain harmonious relationships and to enhance communication effectiveness within the school environment.
EFFECTIVENESS OF STUDENTS' DIRECTIVE SPEECH ACTS COMMUNICATION PATTERNS AT SMKN 2 PALU Indriani Rais, Fajrin; Yunidar; Ulfah; Ida Nur'aeni; Mohammad Tahir
JURNAL KONFIKS Vol 13 No 1 (2026): KONFIKS
Publisher : Universitas Muhammadiyah Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26618/y21hg177

Abstract

This study aims to describe the patterns and effectiveness of directive speech acts used by students of the Visual Communication Design (DKV) Department under the Merdeka Curriculum at SMKN 2 Palu, particularly in the context of promoting their design products. The study combines qualitative analysis of directive forms (inviting, requesting, suggesting, commanding) with quantitative measurement of communication effectiveness using a Likert scale. The findings reveal that students predominantly use inviting and suggesting speech acts, while requesting and commanding occur less frequently. Based on Berlo’s SMCR model, the suggesting directive emerges as the most effective form due to its combination of politeness, clarity of intention, and persuasive power, whereas requesting shows the lowest effectiveness. Social factors such as gender, age, local dialect use, and learning environment influence students’ communication patterns. The Chi-Square test indicates a significant relationship between types of directive speech acts and their levels of effectiveness (p < 0.05). These findings highlight the need to strengthen students’ professional communication competence within the DKV learning framework, particularly in the context of the Merdeka Curriculum and Teaching Factory, to enable students to promote their design works more persuasively and in alignment with industry standards
Co-Authors Agustan Agustan, Agustan Alfriansyah Alfriansyah Anum Badar Bakri Bakri Eka Wahyudi, Andi Sultan Brilin Susandi Finarti, Finarti hendik mentara hendrik mentara, hendik mentara hendrik Ida Nur'aeni Indriani Rais, Fajrin Rizki Rizki Sadaf Khan Saman Babree Sobia Usman Shah Sri Chandrabakty Syamsuddin Syamsuddin Ulfah Yunidar