KARAKTERISTIK PEMECAHAN MASALAH MATEMATIKA OPEN ENDED DITINJAU DARI KEMAMPUAN LOGIKA SISWA KELAS XI SMA NEGERI 3 WAJO

Tujuan penelitian ini adalah menggambarkan karakteristik pemecahan masalah matematika open ended ditinjau dari kemampuan logika. Jenis penelitian mix method dengan instrumen dalam penelitian ini adalah peneliti sendiri sebagai instrumen utama yang dipandu oleh tes pemecahan masalah matematika open ended dan pedoman wawancara yang valid dan reliabel. Subjek penelitian adalah siswa kelas XI.IPA SMA Negeri 3 Wajo yang terdiri dari 2 siswa kemampuan logika tinggi (ST) dan 2 siswa kemampuan logika rendah (SR). Pengumpulan data dilakukan dengan cara analisis tes dan wawancara. Hasil penelitian menunjukkan: 1) Hasil uji hipotesis korelasi Chi-Square menunjukkan bahwa Pvalue (2-tailed) = 0,000 < α = 0,05, berarti terdapat hubungan positif antara kemampuan logika dan hasil tes pemecahan masalah matematika open ended siswa, 2) karakteristik pemecahan masalah matematika open ended siswa kemampuan logika tinggi (ST) dalam (a) memahami masalah memiliki pemahaman masalah secara komprehensif; (b) merencanakan penyelesaian melakukan koneksi antar konsep; (c) melakukan rencana penyelesaian melakukan analisis antar konsep yang terkait; (d) melakukan penelusuran kembali, 3) karakteristik pemecahan masalah matematika open ended siswa kemampuan logika rendah (SR) dalam (a) memahami masalah memiliki pemahaman eksplisit; (b) merencanakan penyelesaian SR berpikir praktis; (c) melakukan rencana penyelesaian SR menerapkan rumus yaitu menerapkan rumus secara langsung; (d) tidak melakukan penelusuran kembali. Kata Kunci: pemecahan masalah matematika open ended, kemampuan logik

Reliability Study of the Liquid Target Chamber for 18F Production at the BATAN's Cyclotron Facilities

The liquid target chamber for 18F production at the Cyclotron Division, Centre for Radioisotopes and Radiopharmaceuticals (PRR) of the National Nuclear Energy Agency of Indonesia (BATAN) has been analysed for its reliability in enduring high pressures and heat transfer requirements during proton beam bombardment as well as the recommended irradiation parameters for effective 18F production. The target chamber was subject to house the 18O-enriched water bombarded with high energy proton beam to produce 18F. A range of SRIM-computer simulations have also been conducted to calculate the ranges of several energetic proton beams (of up to 20 MeV) into pure water target. A study of radioactive impurities which might be produced from the proton-irradiated chamber's materials was also included based on some references. Due to concern over the heat produced during target irradiation, a heat transfer analysis - particularly for the target's cavity - was also included in the presented studies to obtain a brief preliminary calculation of the heating impacts prior to irradiation tests. The calculation was performed for various proton beam currents and energies of up to 30 μA and 20 MeV respectively. It was found that the chamber was reliable for production of 18F from proton irradiated-18O enriched-water target by maintaining the chamber's pressure of up to 3.6 bar if the proton beam current was kept below 16 μA for all energies or the proton beam energy was kept to or below 10 MeV for any employed beam currents. The overall heat transfer coefficient was also found to depend on the power deposited into the water target. Received: 25 June 2010; Revised: 20 March 2011; Accepted: 08 April 201

Analisis Variasi Suhu Pemanasan Serbuk Batu Basalt Sebagai Bahan Pengisi Ordinary Portland Cement Terhadap Kuat Tekan Beton

Utilization of basalt scoria stone as one of the building materials that can be one of thealternatives to limestone which has been known as a cement maker and utilizes the availability ofabundant basalt, especially in Lampung which has these natural resources. This research is toanalyze the basalt stone powder and analyze the optimum content at the temperature variation ofthe most effective mixture of basalt stone powder to produce compressive strength of concrete.The research method uses experimental methods at the Bandar Lampung University laboratory.The specimens used were cylinders with a diameter of 10.16 cm and a height of 20cm totaling 63specimens using the DOE method. There are 6 types of mixtures, namely at a temperature of800˚C there are 2 mixes of 3% and 7% basalt stone powder, a temperature of 1200˚C there are 2mixes of 3% and 7% basalt stone powder, and at a temperature of 1600˚C there are 2 mixtures of3% and 7% basalt stone powder. Compressive strength testing is performed at the age of concretetesting 7, 14, and 28 days.The results of the study show that the addition of heated basalt stone powder can increase thecompressive strength of concrete. The compressive strength results in a mixture of temperaturevariations included in the planned compressive strength. The optimum compressive strength valueof 28 days of testing occurred on 3% concrete mix of basalt stone powder at a temperature of1600˚C that is equal to 392 kg / cm².Keywords: Concrete, Basalt Stone and compressive strengt

PENGARUH VARIETAS TERHADAP HASIL KACANG PANJANG (Vigna unguiculata L.) DI TANAH REGOSOL

Penelitian bertujuan untuk mengetahui pengaruh varietas terhadap hasil kacang panjang di tanah regosol. Penelitian ini dilaksanakan pada bulan Februari sampai Mei 2024 di kebun riset PT. Hibrida Jaya Unggul, Sendangtirto, Berbah, Sleman, Daerah Istimewa Yogyakarta. Penelitian ini menggunakan Rancangan Acak Kelompok Lengkap 4 perlakuan yang terdiri dari calon varietas JS KCP 03, varietas Anjani, varietas Zalva, dan varietas Gultor dengan 4 ulangan. Data kuantitatif dianalisis menggunakan analisis sidik ragam dilanjutkan dengan BNJ 5%. Berdasarkan hasil pengamatan pada karakter kuantitatif beberapa varietas menunjukkan bahwa perlakuan varietas berbeda nyata terhadap parameter panjang polong, diameter polong, bobot per polong, jumlah biji per polong, jumlah polong per tanaman, berat polong per tanaman, berat polong per petak, dan produktivitas, namun tidak berpengaruh nyata terhadap parameter umur berbunga dan umur panen

EFEKTIVITAS METODE QIŞŞAH QUR’ĀNĪ DAN TARGĪB TARHĪB TERHADAP HASIL BELAJAR SISWA PADA MATA PELAJARAN PAI: Studi Kuasi Eksperimen di Sekolah Dasar Kelas V Gugus Patimura Indragiri Hilir Riau

Penelitian ini dilatarbelakangi masih banyak guru dalam menyampaikan materi pelajaran agama terfokus pada metode konvensional, sehingga terkesan monoton. Mnat, motivasi, serta antusias belajar siswa cendrung menurun. Untuk mengatasinya perlu adanya efektifitas peningkatan kemampuan guru dalam proses belajar mengajar. Salah satunya menguasai variasi metode pembelajaran Islam yang diambil dari metode Qur`ānī. Tujuan penelitian ini untuk mengetahui efektivitas metode Qiṣṣah Qur`ānī dan Targīb Tarhīb dan pengaruhnya terhadap hasil belajar siswa pada mata pelajaran PAI. Metode penelitian yang digunakan adalah kuantitatif dengan metode The Statistic Group Pretest-Posttest Design. Sampel penelitian yaitu kelas V SD jumlah keseluruhan sebanyak 69 siswa, terbagi menjadi tiga kelas penelitian jumlah masing-masing 23 siswa. Instrumen yang digunakan dalam pengambilan data adalah dari pretest dan posttest serta angket siswa. Analisis data dilakukan dengan software Anates Versi 4 for Windows , dan dengan bantuan program Microsoft Excel dan software SPSS Versi 21.0 for Windows. Temuan dalam penelitian ini bahwa dengan menggunakan metode Qiṣṣah Qur`ānī dan Targīb-Tarhīb dalam proses pembelajaran dapat meningkatkan hasil belajar siswa. Berdasarkan data hasil penelitian secara statistik tersebut nilai rerata peningkatan hasil belajar (gain) menunjukan ada perbedaan perolehan skor, dimana skor pada X1= 19 > X2= 18 dengan selisih 1 angka. Sehingga dapat disimpulkan bahwa proses belajar dengan metode Qiṣṣah Qur`ānī lebih efektif peningkatan hasil belajarnya dari pada proses belajar yang menggunakan metode Targīb-Tarhīb dengan selisih gain 1. The background to the research is the large number of teachers who still deliver the materials of religious subject using the conventional method, which is monotonous. Hence, students’ learning interest, motivation, and enthusiasm tend to decrease. To solve this problem, the effectiveness of teachers’ improvement in their teaching ability becomes important. One of the efforts is by mastering various methods of Islamic instruction taken from the Qur`ānīmethod. The research aims to find the effectiveness of Qiṣṣah Qur`ānī and Targīb Tarhīb methods and their effects on students’ learning outcomes in the subject of Islamic Education. The research adopted the quantitative approach with the pretest-posttest group design. The sample consisted of 69 fifth grade primary school students, divided into three research groups, each with 23 students. The instruments used for data collection included pretest and posttest and teacher’s and student’s questionnaires.Data were analyzed using Anates Version 4 for Windows aided by Microsoft Excel and SPSS 21.0 for Windows.The findings show that using Qiṣṣah Qur’ānī and Targhīb-Tarhīb methods in instructional processes could increase students’ learning outcomes. Based on the results of statistical analysis of the research data, it was also found that there was a difference in the mean improvement of the learning outcomes (gain), in which X1(Qiṣṣah Qur’ānī)= 19 > X2(Targhīb-Tarhīb) = 18, with a difference of 1 point. Hence, it can be concluded that the learning process using Qiṣṣah Qur`ānī method was more effective in improving the students’ learning outcomes than the Targīb-Tarhīb method with a difference in gain of 1 point

THE EFFECT OF ROOTING MEDIA ON THE GROWTH OF MALAY APPLE (Syzygium malaccense L.) SEEDLINGS FROM STEM CUTTINGS

This study aims to determine the effect of the type of planting medium in the propagation of Malay apple cuttings. The research design used is random design non-factorial grouping that consist of 5 levels of treatment for cuttings rooting media types, i.e. soil (1), soil + compost (1:1), soil + compost + chaff charcoal (1:1:1), sand + compost + chaff charcoal (1:1:1), and compost (1) with 5 repetitions and each replication consists of 25 experimental units, and each experimental unit consists of 15 samples and 3 spare plants, so there are 450 plants. The research was conducted from February to July 2022. The parameters observed include the time of shoot emergence, sprout percentage, root length, seed height, root volume, and the percentage of life. Data analysis used ANOVA (analysis of variance) and if there was an effect, then continued with the tukey’s HSD (Honestly Significant Difference) test with a level of 5%. The results showed that rooting media mixed with soil + compost + chaff charcoal or mixed media of sand + compost + chaff charcoal could increase the percentage of survival, seedling height, root length, and root volume of malay apple seedlings from stem cuttings

Substitution local resources basalt stone scoria Lampung, Indonesia, as a third raw material aggregate to increase the quality of portland composite cement (PCC).

Domestic cement demand is increasing in line with the increase of development of property sector and construction sector. Cement is one of the important components in making a permanent building. The function of cement in a construction is as an adhesive material that affects the strength of a building. The process of making cement is divided into two groups, namely hydraulic cement and non-hydraulic cement. Hydraulic cement consists of Portland type cement and PCC type cement, PPC cement and slag cement. The type of PCC cement (Portland Composite Cement) is produced from grinding clinker with gypsum with the addition of third raw material. The purpose of this research is to know the effect of cement quality improvement with substitution of basalt scoria stone raw material as much as 0-10% as the third raw material. The source of basalt scoria stone originated from Lampung Timur, Indonesia. The fineness test showed cement fineness was 2983-3665 cm2/gr with minimum SNI standard 2800 cm2/gr. Residue test meets the requirements of SNI standard that is equal to 16,07% -18,55%. The compressive strength test was performed at ages 3, 7 and 28 days and obtained the result that the optimum compressive strength produced was 235, 314, 394 kg/cm2. Basalt rock usage as substitution material in cement production can decrease environmental pollution caused by clinker production. Based on the cost estimation analysis, the use of basalt stone can decrease the production cost which impact on the increase of profitN/

Reliability Study of the Liquid Target Chamber for 18F Production at the BATAN’s Cyclotron Facilities

The liquid target chamber for 18F production at the Cyclotron Division, Centre for Radioisotopes and Radiopharmaceuticals (PRR) of the National Nuclear Energy Agency of Indonesia (BATAN) has been analysed for its reliability in enduring high pressures and heat transfer requirements during proton beam bombardment as well as the recommended irradiation parameters for effective 18F production. The target chamber was subject to house the 18O-enriched water bombarded with high energy proton beam to produce 18F. A range of SRIM-computer simulations have also been conducted to calculate the ranges of several energetic proton beams (of up to 20 MeV) into pure water target. A study of radioactive impurities which might be produced from the proton-irradiated chamber’s materials was also included based on some references. Due to concern over the heat produced during target irradiation, a heat transfer analysis - particularly for the target’s cavity - was also included in the presented studies to obtain a brief preliminary calculation of the heating impacts prior to irradiation tests. The calculation was performed for various proton beam currents and energies of up to 30 μA and 20 MeV respectively. It was found that the chamber was reliable for production of 18F from proton irradiated-18O enriched-water target by maintaining the chamber’s pressure of up to 3.6 bar if the proton beam current was kept below 16 μA for all energies or the proton beam energy was kept to or below 10 MeV for any employed beam currents. The overall heat transfer coefficient was also found to depend on the power deposited into the water target. Received: 25 June 2010; Revised: 20 March 2011; Accepted: 08 April 201

RESPON KARAKTER AGRONOMI PADA ERCIS GALUR LOKAL (Pisum sativum L.)

Penelitian ini bertujuan untuk mengetahui respon karakteristik agronomi pada beberapa galur lokal ercis di lahan sawah. Penelitian berlokasi di Desa Tegalsari, Kecamatan Kedu, Kabupaten Temanggung, Provinsi Jawa Tengah pada bulan Februari - Juni 2023. Penelitian menggunakan Rancangan Acak Kelompok dengan 4 ulangan. Perlakuan penelitian terdiri dari TM = Lokal Temanggung, BT = Lokal Batu, WO = Lokal Wonosobo, BYL = Lokal Boyolali,  TC11 = Taicung 11 dan  TC13 = Taicung 13. Hasil penelitian menunjukkan bahwa galur lokal ercis nyata berpengaruh terhadap karakter agronomi. Karakter agronomi yang nyata berbeda terdiri dari parameter tinggi tanaman, panjang dan lebar daun, umur berbunga, umur panen,  jumlah polong,  berat 1000 biji, berat polong dan produktivitas. Galur lokal Batu memberikan produktivitas yang terbaik sebesar 1923,06 kg/ha