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All Journal Journal of the Indonesian Tropical Animal Agriculture Dinamika Teknik Mesin : Jurnal Keilmuan dan Terapan Teknik Mesin REKONSTRUKSI TADULAKO: Civil Engineering Journal on Research and Development MILANG Journal of Mathematics and Its Applications
L. Hakim
Faculty of Pharmacy, Gadjah Mada University, Yogyakarta Indonesia
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Earth & Planetary Sciences Engineering Environmental Science Mathematics Mechanical Engineering Physics Transportation

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 1 
THE ESTIMATION ACCURACY OF LIVE WEIGHT FROM METRIC BODY MEASUREMENTS IN ONGOLE GRADE COWS Paputungan, U.; Hakim, L.; Ciptadi, G.; Lapian, H.F.N.
Journal of the Indonesian Tropical Animal Agriculture Vol 38, No 3 (2013): (September)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jitaa.38.3.149-155

Abstract

length in North Sulawesi province. Data on animal live weight (LW), body length (BL) and chest girth(CG) were collected from all cows (n=363) kept by traditional household farmers. Regression analysiswas carried out to estimate LW from all linear body measurements. Data were classified based on age ofanimals consisted of five groups with the first age group of two and half years old, to the fifth age groupof seven and half years old. The results showed that age significantly (P<0.05) influenced all bodymeasurements. Correlations between all pairs of measurements were highly significant (P<0.001) for allage groups. Regression analysis showed that live weight could be predicted accurately from chest girthand body length (R2=0.97). Multiple regression model can be recommended to predict live weight ofOngole grade cows based on those variables with their age groups ranging from 2.5 to ≥7.5 years old asfollows: Live weight (kg) = -806.410 + 4.79835 CG (cm) + 2.83500 BL (cm).
DETECTION OF MENDELIAN AND GENOTYPE FREQUENCY OF GROWTH HORMONE GENE IN ONGOLE CROSSBRED CATTLE MATED BY THE ARTIFICIAL INSEMINATION TECHNIQUE Paputungan, U.; Hakim, L.; Ciptadi, G.; Lapian, H.F.N.
Journal of the Indonesian Tropical Animal Agriculture Vol 37, No 2 (2012): (June)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jitaa.37.2.79-85

Abstract

The objectives of this study were to detect the Mendelian mode inheritance of growth hormone(GH) and to establish genotype frequency of GH gene in Ongole-crossbred cattle mated by the artificialinsemination (AI) technique. Total of 76 blood samples were collected from Ongole-crossbred cows andbulls (G0), and their progenies (G1) at the Tumaratas AI service center in North Sulawesi province,Indonesia. All blood samples were screened for the presence of GH locus using a PCR-RFLP methodinvolving restricted enzyme Msp1 on 1.2 % of agarose gel. Data were analyzed using statistical programfunction in Excel XP. The results showed that GH locus using alleles of Msp1+ and Msp1- enzymerestriction in Ongole-crossbred cows and bulls was inherited to their Ongole-crossbred progeniesfollowing the Mendelian mode inheritance. This Mendelian inheritance generated by AI technique wasnot under genetic equilibrium for the Msp1 genotype frequencies in groups of G0 and G1. The breedingprogram using genotypes of bulls and cows (G0) for generating the genotype of GH Msp1 enzymerestriction by AI technique should be maintained to increase these various allele dispersion rates forbreeding under genetic equilibrium of the Ongole-crossbred cattle population.
GENETIC IMPROVEMENT OF WEANING WEIGHT, YEARLING WEIGHT, BODY WEIGHT GAIN AND BODY DIMENSION OF BALI CATTLE Supriyantono, A.; Hakim, L.; Suyadi, S.; Ismudiono, I.
Journal of the Indonesian Tropical Animal Agriculture Vol 37, No 1 (2012): (March)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jitaa.37.1.10-14

Abstract

The aim of the research was to evaluate the genetic improving of production traits selected of Balicattle. Four hundred and twenty eight data of weaning weight, yearling weight and body weight gainwere used to estimate genetic improvement for those traits. One hundred and seven data of bodydimension (body weight, chest circumference, body length and withers height) at 24 months old wereused to estimate genetic improving for those traits. The estimation of genetic and environmentalvariance and co-variance component, and heritability were found by animal model. The fix effect ofweaning weight, yearling weight and body weight gain was rainfall, age of measurement and year ofbirth, whereas the fix effect of body dimension depend on each trait. The result showed that heritabilityof weaning weight, yearling weight, body weight gain, body weight, chest circumference, body lengthand withers height was 0.090.15, 0.270.13, 0.470.15, 0.070.19, 0.500.19, 0.340.28, 0.600.21,respectively. Genetic improvement of all traits have had a different pattern in selection responses. Alltraits did not show genetic improvement due to selection for.
HERITABILITIES OF BODY SIZE BY GROWTH HORMONE (GH-Msp1) GENOTYPES USING PCR-RFLP IN ONGOLE GRADE CATTLE Paputungan, U.; Hakim, L.; Ciptadi, G.; Lapian, H. F. N.
Journal of the Indonesian Tropical Animal Agriculture Vol 40, No 3 (2015): September
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jitaa.40.3.138-144

Abstract

Genotypic performance in term of heritability as the crucial factor of animal economical traits for body size inheritance had not been fully studied in Ongole-grade cattle. The objectives of this research were to define the heritability values of live weight, chest girth and body length in Ongole-crossbred cattle. Total of 37 blood samples were collected from parental cows and 2 blood samples from parental Ongole breed bulls. All blood samples were screened for the presence of growth hormone (GH) locus using PCR-RFLP method involving restricted enzyme Msp1 on agarose-gel (1.2%). Data were analyzed using statistical program in Excel XP. Results showed that the phenotypic estimation average of Ongole grade cattle population of live weight, chest girth and body length were 445.41 ± 45.95 kg, 175.35 ± 4.11 cm, and 139.70 ± 5.73cm, respectively. The heritability values of animal live weight, chest girth and body length in this study were 0.24, 0.003, and 0.41, respectively. These heritability values of animal live weight and body length would be categorized as moderate to high genotypic performance values, while the heritability of animal chest girth was included in low heritability standard of the animal economical trait performance.
Characteristics of ASTM A36 steel mechanical properties in pack carburizing with carburizing agent coconut shell charcoal and goat bone powder mixed Sujita, S.; Okariawan, I.D.K.; Hakim, L.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 13, No 1 (2023): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v13i1.619

Abstract

In the study the specimens were ASTM A36 low carbon steel pack  carburizing at 950℃, soaking time variations of 1, 2 and 3 hours. The carburizing agent is a mixture of coconut shell charcoal and goat bone powder (Capra aegagrus hircus). The size of the powder is 100 mesh, with variations in weight percentage between goat bone powder and coconut shell charcoal: 10%:90%, 20% : 80%, and 30% : 70%. Furthermore, the impact test, hardness, microstructure test and composition test were carried out, to determine the mechanical properties of the specimens. The results of the study show, soaking time and the composition of the carburizing agent affect the mechanical properties of the specimen The lowest impact toughness of 0,0576 joules/mm2 was obtained by the specimen at a soaking  time of 1 hour, the composition of the carburizing agent  (% wt goat bone powder: coconut shell charcoal) 20% : 80%. The highest surface hardness value was 854.734 Kg/mm2 at 3 hours soaking  time with 10%:90% carburizing media composition. The results of microstructure observations showed that in specimens treated with pack carburizing ferrite structure, pearlite turned into martensite.
Faktor Kualifikasi Kontraktor yang Mempengaruhi Kinerja Proyek Konstruksi Berdasarkan Persepsi Konsultan Lioni, C.Z.; Fahirah, F.; Hakim, L.
REKONSTRUKSI TADULAKO: Civil Engineering Journal on Research and Development Vol. 6 Issue 2 (September 2025)
Publisher : Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/renstra.v6i2.771

Abstract

The development of quality infrastructure in Sigi Regency plays a vital role in supporting economic growth and community welfare, particularly in the aftermath of the 2018 earthquake. The success of this development is significantly influenced by contractor qualifications, which encompass technical aspects, experience, and available resources. This study aims to identify the dominant contractor qualification factors influencing construction project performance and to analyze the relationships among these factors based on the perceptions of consultants in Sigi Regency. This study employed a quantitative approach, distributing questionnaires to 37 consultants selected through purposive sampling. Data from 24 variables were analyzed using descriptive statistics, the Relative Rank Index (RRI), and Spearman's Rho correlation. The RRI analysis identified five dominant factors: financial obstacles during project implementation (RRI = 0.874), labor experience (RRI = 0.869), the educational background of the person-in-charge (RRI = 0.847), compliance with technical specifications (RRI = 0.815), and the educational background of implementers and supervisors (RRI = 0.811). The Spearman correlation analysis revealed a strong relationship between the educational backgrounds of implementers and the person-in-charge (r = 0.668). However, the financial obstacles factor showed a very weak correlation with the other four variables. This study underscores that human resource competency and financial readiness are critical factors for enhancing construction project performance in Sigi Regency.
MODEL GOAL PROGRAMMING DAN PENGOPTIMUMAN TAKLINEAR PADA PENJADWALAN PERAWAT HAKIM, L.; BAKHTIAR, T.; JAHARUDDIN, J.
MILANG Journal of Mathematics and Its Applications Vol. 15 No. 1 (2016): Journal of Mathematics and Its Applications
Publisher : School of Data Science, Mathematics and Informatics, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jmap.15.1.23-32

Abstract

Penjadwalan perawat merupakan pekerjaan penting dalam operasional sebuah rumah sakit. Jika manajemen rumah sakit melakukan penjadwalan dengan baik maka akan berdampak pada kinerja perawat yang semakin baik. Salah satu indikator penjadwalan yang baik adalah tercapainya distribusi beban kerja yang merata bagi seluruh perawat. Namun demikian, adanya keterbatasan sumber daya untuk memenuhi kebutuhan rumah sakit menjadi kendala tersendiri dalam upaya mencapai keadilan. Dalam hal ini, goal programming dapat menjadi salah satu solusi untuk mengatasi kendala tersebut. Dalam penelitian ini, nonpreemptive goal programming digunakan untuk memecahkan masalah penjadwalan perawat. Tujuan model ini adalah untuk meminimumkan beberapa simpangan preferensi perawat terhadap banyaknya shift kerja dan libur. Kami juga memberikan alternatif penyelesaian penjadwalan perawat menggunakan model optimasi taklinear dengan meminimumkan ragam beban kerja pada setiap shift kerja dan libur. Model ini diaplikasikan pada penjadwalan perawat ruang rawat inap Rumah Sakit Umum Daerah Kota Bogor.
Co-Authors Andoyo Supriyantono BAKHTIAR, T. Fahirah, F. G. Ciptadi H. F. N. Lapian, H. F. N. H.F.N. Lapian I. Ismudiono Jaharuddin, Jaharuddin Lioni, C.Z. Okariawan, I.D.K. S. Suyadi Sujita, Sujita U. Paputungan