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All Journal Jurnal Pertambangan Jurnal Pendidikan IPA Indonesia Journal of the Indonesian Tropical Animal Agriculture Tropical Animal Science Journal
A. Sofyan
Biology Education Departement, UIN Syarif Hidayatullah Jakarta
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Education Energy Engineering

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Discovering Learning Strategy to Increase Metacognitive Knowledge in Biology Learning in Secondary School Herlanti, Y.; Mardiati, Y.; Wahyuningtias, R.; Mahardini, E.; Iqbal, M.; Sofyan, A.
Jurnal Pendidikan IPA Indonesia Vol 6, No 1 (2017): April 2017
Publisher : Program Studi Pendidikan IPA Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpii.v6i1.9605

Abstract

The study is aimed at finding an effective learning strategy that can increase metacognitive knowledge. Metacognitive knowledge is a standard that based on 2016-revised edition of 2013 curriculum needs to be achieved by every graduate in all level of education in Indonesia. The study is conducted in three different schools and engages 207 students, which then divided into six groups. The groups are students who study under mind mapping strategy, concept mapping, reciprocal teaching using summary notes, reciprocal teaching using mind mapping, problem-based learning, and investigation group. The results showed that those studying under problem-based learning strategy spent a significantly higher numbers in metacognitive knowledge in biology learning and followed by students who study under reciprocal teaching using mind mapping. According to the finding, it is expected that teachers of Biology will practice problem-based learning strategy in their classroom in order to increase the Metacognitive knowledge.
Discovering Learning Strategy to increase Metacognitive Knowledge on Biology Learning in Secondary School Herlanti, Y.; Mardiati, Y.; Wahyuningtyas, Retno; Mahardini, E.; Iqbal, M.; Sofyan, A.
Jurnal Pendidikan IPA Indonesia Vol 6, No 1 (2017): April 2017
Publisher : Program Studi Pendidikan IPA Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpii.v6i1.9653

Abstract

The study is aimed at finding an effective learning strategy that can increase metacognitive knowledge. Metacognitive knowledge is a standard that based on 2016-revised edition of 2013 curriculum needs to be achieved by every graduate in all level of education in Indonesia. The study is conducted in three different schools and engages 207 students, which then divided into six groups. The groups are students who study under mind mapping strategy, concept mapping, reciprocal teaching using summary notes, reciprocal teaching using mind mapping, problem-based learning, and investigation group. The results showed that those studying under problem-based learning strategy spent a significantly higher numbers in metacognitive knowledge in biology learning and followed by students who study under reciprocal teaching using mind mapping. According to the finding, it is expected that teachers of Biology will practice problem-based learning strategy in their classroom in order to increase the Metacognitive knowledge. 
Discovering Learning Strategy to Increase Metacognitive Knowledge in Biology Learning in Secondary School Herlanti, Y.; Mardiati, Y.; Wahyuningtias, R.; Mahardini, E.; Iqbal, M.; Sofyan, A.
Jurnal Pendidikan IPA Indonesia Vol 6, No 1 (2017): April 2017
Publisher : Program Studi Pendidikan IPA Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpii.v6i1.9605

Abstract

The study is aimed at finding an effective learning strategy that can increase metacognitive knowledge. Metacognitive knowledge is a standard that based on 2016-revised edition of 2013 curriculum needs to be achieved by every graduate in all level of education in Indonesia. The study is conducted in three different schools and engages 207 students, which then divided into six groups. The groups are students who study under mind mapping strategy, concept mapping, reciprocal teaching using summary notes, reciprocal teaching using mind mapping, problem-based learning, and investigation group. The results showed that those studying under problem-based learning strategy spent a significantly higher numbers in metacognitive knowledge in biology learning and followed by students who study under reciprocal teaching using mind mapping. According to the finding, it is expected that teachers of Biology will practice problem-based learning strategy in their classroom in order to increase the Metacognitive knowledge.
Business sustainability model of smallholder layer farms in Kendal Regency, Central Java, Indonesia Sofyan, A.; Suprijatna, E.; Santoso, S. I.; Setiadi, A.
Journal of the Indonesian Tropical Animal Agriculture Vol 44, No 4 (2019): December
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jitaa.44.4.408-414

Abstract

This study was aimed to analyze factors and models of business sustainability of smallholder layer farms in Kendal Regency, Indonesia. Purposive sampling method was used to select 120 active layer chicken farmers in Sukorejo, Pageruyung, Patean, Limbangan, and Boja Districts as research respondents with the ownership of 300 to 10,000 birds. Research variables consisted of three external variables (social, economic, and institutional) and two internal variables (income and business sustainability). Closed questionnaires were used to collect data. The data were analyzed descriptively using Structural Equation Modeling (SEM) by AMOS 21 software. The results showed that the exogenous and endogenous variables met the modeling criteria with Chi square value = 160.764; probability = 0.380; CMIN / DF = 1.031; GFI = 0.892; AGFI = 0.841; TLI = 0.998; CFI = 0.998; RMSEA = 0.016. Social, economic, institutional and income variables had a significant and positive influence (P≤0.05) on business sustainability. The constructed model had a strong and positive relationship, so it could illustrate the sustainability model of layer business in Kendal Regency.
SUPPLEMENTARY FEEDING ON THE NUTRIENT BALANCE OF LACTATING DAIRY COW AT CONTRASTING TEMPERATURE REGIMES: ASSESSMENT USING CORNELL NET CARBOHYDRATE AND PROTEIN SYSTEM (CNCPS) MODEL Jayanegara, A.; Sofyan, A.
Journal of the Indonesian Tropical Animal Agriculture Vol 34, No 3 (2009): (September)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jitaa.34.3.196-204

Abstract

Dairy cows often do not receive adequate nutrient supply during their lactation period. This condition caneven be worse if the environmental temperature is not in comfortable range which may occur especially intropical regions. The present research was aimed to simulate the effect of supplementary feeding on nutrientbalance of lactating dairy cow at contrasting temperature regimes using Cornell Net Carbohydrate andProtein System (CNCPS) model. Treatments consisted of feeds (R1: Pennisetum purpureum, R2: P.purpureum + concentrate (60:40), R3: P. purpureum + Gliricidia sepium + Leucaena leucocephala(60:20:20), R4: P. purpureum + concentrate + G. sepium + L. leucocephala (60:20:10:10)) and environmentaltemperatures (T1: 20 oC, T2: 30 oC). The dairy cow inputs in CNCPS were Holstein breed, body weight of500 kg, feed intake of 15 kg (dry matter basis) per day and produced milk 15 kg/day. Based on the CNCPSmodel, there were negative balances of metabolisable energy (ME) and metabolisable protein (MP) if alactating dairy cow fed only by P. purpureum. The ME balance was worse at higher temperature, while theMP balance was remain unchanged. Addition of concentrate mixture (R2) fulfilled the ME and MPrequirements as well as other nutrients. Addition of leguminous tree leaves (R3 and R4) improved thenutritional status of the lactating cow model compared to R1, but did not better than R2. It was concludedthat supplementary feeding is necessary for improving the nutrient balance of lactating dairy cow, especiallywhen the cow is maintained under uncomfortable environmental temperature.
Cholesterol-lowering activity of lactic acid bacteria and yeast when used as probiotics in laying quail (Coturnix coturnix Japonica) Istiqomah, L.; Sakti, A. A.; Sofyan, A.; Herdian, H.; Anggraeni, A. S.
Journal of the Indonesian Tropical Animal Agriculture Vol 45, No 4 (2020): December
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jitaa.45.4.305-319

Abstract

This study aimed to evaluate the administration of Lactobacillus plantarum AKK-30 and Saccharomyces cerevisiae B-18 as probiotics in reducing cholesterol of blood, egg, and meat and also the production performance of laying quail (Coturnix coturnix Japonica). A number of 600 birds of the twenty one-day-old quails were distributed in a completely randomized design with 5 treatments and 6 replications (initial BW= 101.35 ± 1.64 g). Treatments were as follows: A = negative control (basal diet without probiotic), B = 1% of L. plantarum AKK-30 (107 cfu/g), C = 1% of S. cerevisiae B-18 (106 cfu/g), D = 1% of a probiotic consortium, E = positive control (commercial probiotic). Parameters observed were blood biochemistry profiles, product quality, and production performance. The results revealed that administration of 1% S. cerevisiae (C) resulted the lowest cholesterol in blood (101.75 mg/dL) and egg (9.44 mg/g) and while administration of 1% L. plantarum(B) increased meat protein and decreased fat content (P<0.05). Level of blood triglycerides, low-density lipoprotein (LDL), and high-density lipoprotein (HDL) were not different among treatments. Probiotic treatments did not affect the growth performance, quail day production (QDP), feed conversion ratio (FCR) and egg uniformity. However, probiotic increased diameter of egg yolk (P<0.05). It was concluded that administration of single probiotic L. plantarum AKK-30 or S. cerevisiae B-18 improves the quality of laying quail products. 
AMINO ACID PROFILE OF EARTHWORM AND EARTHWORM MEAL (Lumbricus rubellus) FOR ANIMAL FEEDSTUFF Istiqomah, L.; Sofyan, A.; Damayanti, E.; Julendra, H.
Journal of the Indonesian Tropical Animal Agriculture Vol 34, No 4 (2009): (December)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jitaa.34.4.253-257

Abstract

Earthworm meal (Lumbricus rubellus) has become one of natural material that could be used asfeed additive. Powdering method of earthworm was done by using formic acid addition. The study wascarried out (1) to evaluate the essential amino acid profile of earthworm and earthworm meal, (2) tocalculate the value of essential amino acid index (EAAI) of both materials. A modified EAAI equationwas developed from the essential amino acid profile of earthworm and earthworm meal. The resultshowed that essential amino acid of earthworm was dominated by histidine (0.63% of dry matter basis),meanwhile the earthworm meal was dominated by isoleucine (1.98% of dry matter basis). The nonessential amino acid of earthworm and earthworm meal was dominated by glutamic acid (1.52% and3.60% of dry matter basis respectively). The value of essential amino acid index obtained fromearthworm meal was higher (58.67%) than those from earthworm (21.23%). It is concluded thatpowdering method of earthworm by using formic acid addition had higher amino acid balance thanearthworm.
MICROBIOLOGICAL CHARACTERISTIC AND FERMENTABILITY OF KING GRASS (Pennisetum hybrid) SILAGE TREATED BY LACTIC ACID BACTERIAYEAST INOCULANTS CONSORTIUM COMBINED WITH RICE BRAN ADDITION Sofyan, A.; Yusiati, L.M.; Widyastuti, Y.; Utomo, R.
Journal of the Indonesian Tropical Animal Agriculture Vol 36, No 4 (2011): (December)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jitaa.36.4.265-272

Abstract

This research was conducted to evaluate the effect of inoculants consortium consisted ofLactobacillus plantarum (Lp) and Saccharomyces cerevisiae (Sc) and combined with rice bran additionon microbiological characteristic and fermentability of king grass (Pennisetum hybrid) silage. Effectivityof treatments was assessed by addition of inoculants (control, Lp, Lp+Sc) and level of rice bran (0, 5 and10%) which were arranged on Completely Randomized Design with Teatments Factors (3x3). Thevariables measured were total colonies of microbes (lactic acid bacteria, yeast and clostridia), total gasproduction, volatile fatty acids (VFA) and ammonia (NH3). Results showed that clostridial coloniescounted on silage treated by Lp and Lp+Sc around 37.5% and 68.7% in which lower than control.Addition of inoculants and rice bran increased fermentability of silage significantly (P<0.05), howevertreatment had no affected (P>0.05) on production of VFA and NH3. Gas production from silagefermentable fraction with inoculation of Lp (49.5 ml) and Lp+Sc (47.9 ml) higher than untreated silage(46.6 ml). It was concluded that the use of inoculants consortium consisted of L. plantarum and S.cerevisiae with rice bran addition improved fermentability and reduced clostridial colony in king grasssilage.
In sacco nutrient degradability of silage containing intact and defatted black soldier fly (Hermetia illucens) larvae Mulianda, R.; Sofyan, A.; Herdian, H.; Laconi, E.B.; Ridla, M.; Wardani, W. W.; Jayanegara, A.
Journal of the Indonesian Tropical Animal Agriculture Vol 46, No 3 (2021): September
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jitaa.46.3.227-235

Abstract

This study aimed to evaluate the in sacco nutrient degradability of total mixed ration (TMR) silage containing intact and defatted black soldier fly (BSF) larvae. The study evaluated four dietary treatments and six replications. The treatments consisted of control TMR silage without BSF larvae (R1), 20% intact BSF larvae + 80% TMR silage (R2), 20% chemically defatted BSF larvae + 80% TMR silage (R3), and 20% mechanically defatted BSF larvae + 80% TMR silage (R4). Samples were placed in polyester bags and incubated in the rumen in sacco up to 72 h. Nutrient degradability was evaluated for each time point interval. Results revealed that the lowest dry matter degradability (DMD) was found in R1 compared to all treatments (p < 0.05), while the highest DMD was found in R2 (p < 0.05). The highest organic matter degradability was found in R2 compared to R1, R3 and R4 (p < 0.05). Addition of BSF larvae to TMR silage increased the crude protein degradability (p < 0.05). In conclusion, inclusion of both intact and defatted BSF larvae into TMR silage did not have any adverse effects on nutrient profiles and showed a good nutrient degradation values in the rumen.
PENGARUH TINGKAT PELAPUKAN BASAL TERHADAP KEKUATAN BATUAN MENGGUNAKAN UCS DAN SCHMIDT HAMMER Sofyan, A.; ., Purwanto; Qaidahiyani, N. F.
Jurnal Pertambangan Vol 8 No 1 (2024): Februari 2024
Publisher : Fakultas Teknik Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jp.v8i1.1651

Abstract

Batuan sebagai bagian yang inheren terhadap struktur bangunan memiliki peran yang fundamental dalam perancangan konstruksi, baik pada bidang sipil maupun pertambangan. Kabupaten Gowa khususnya Kecamatan Pattalassang menjadi salah satu pusat penambangan batuan yang banyak didistribusikan ke beberapa wilayah sekitarnya. Parameter kekuatan selain dipengaruhi jenis batuan, juga dipengaruhi oleh tingkat pelapukan batuan. Ketidakseragaman pada pelapukan batuan membuat terjadinya variabilitas kekuatan batuan. Penelitian ini bertujuan untuk mengidentifikasi derajat pelapukan pada batuan hasil penambangan di Kabupaten Gowa berdasarkan hasil pengamatan lapangan dan laboratorium, menganalisis pengaruh derajat pelapukan terhadap kekuatan batuan menggunakan uji kuat tekan uniaksial, dan menganalisis kekuatan batuan menggunakan analisis regresi linear pada nilai kuat tekan uniaksial terhadap nilai pantul Schmidt Hammer berdasarkan derajat pelapukannya. Metode pengujian yang digunakan pada penelitian ini adalah menentukan derajat pelapukan menggunakan analisis XRD dan pengamatan mikroskopis, uji sifat fisik batuan, uji kuat tekan batuan menggunakan mesin UCS, pengujian nilai pantul Schmidt Hammer, dan analisis regresi linear korelasi. Hasil penelitian menunjukkan bahwa terdapat 4 jenis derajat pelapukan yaitu derajat pelapukan II, derajat pelapukan III, derajat pelapukan IV, dan derajat pelapukan V. Pengaruh derajat pelapukan terhadap nilai kuat tekan uniaksial menunjukkan pengaruh yang kuat negatif (berbanding terbalik) dimana nilai kuat tekan uniaksial akan menurun seiring meningkatnya derajat pelapukan batuan. Hasil analisis regresi linear sederhana nilai kuat tekan uniaksial terhadap nilai pantul Schmidt Hammer berdasarkan derajat pelapukan adalah UCS = 1,1478 SCH + 39,464, dengan nilai koefisien determinasi (R2)adalah 0,9271, dan koefisien korelasi (R) adalah 0,9628.
Co-Authors A. A. Sakti, A. A. A. S. Anggraeni, A. S. A. Setiadi Anuraga Jayanegara B. Suwignyo, B. Baihaqi, Z. A. E. Damayanti E. Mahardini, E. E. Suprijatna, E. E.B. Laconi H. Herdian H. Julendra Harahap, M. A. Kustantinah L. Istiqomah L.M. Yusiati M. Iqbal Muhammad Ridla Mulianda, R. Nurcahyo, R. W. Panjono Prasetyo Purwanto . Qaidahiyani, N. F. R. Utomo R. Wahyuningtias, R. S. I. Santoso, S. I. Wahyuningtyas, Retno Wardani, W. W. WULANDARI Y. Herlanti Y. Mardiati, Y. Y. Widyastuti