Critical and logical thinking is very important in the study of mathematics, as described in the 2013 curriculum that is currently implemented. However, this ability is often overlooked in the study of mathematics, which still adhered to the old paradigm that learning is less engaging students in active thinking. Thus, students are not used to empowering the cognitive function in thinking. This study aimed to determine the increase in students' critical thinking skills and logical-mathematical in learning mathematics through the cooperative model of Student Team Achievement Division (STAD) assisted Maple. This research used experimental method, with the control group pretest-posttest design. The population was all Year 10 classes in one of the vocational high schools in Banda Aceh, Indonesia. Two classes were taken as the sample (the experimental and control class) through a random sampling technique. Data collection was performed using the tests of critical thinking and logical-mathematical ability. T-test was conducted to see the difference in ability between groups of students learning with STAD and the conventional group, at a significance level of 0.05. The results showed that: 1) Improvement of critical thinking skills of students who got the mathematical learning of mathematics through STAD cooperative model-assisted Maple was better than the students who received conventional learning. 2) Improvement of logical-mathematical thinking ability of students who receive mathematics learning through cooperative model STAD assisted Maple was better than the students experienced the conventional learning.
Pembelajaran kontekstual merupakan sebuah konsep pembelajaran yang membantu guru mengkaitkan antara materi yang diajarkannya dengan situasi dunia nyata dan mendorong pemelajar membuat hubungan antara materi yang diajarkannya dengan penerapannya dalam kehidupan mereka sebagai anggota keluarga dan masyarakat. Kemampuan koneksi matematis yaitu meliputi mencari hubungan antar topik matematika, hubungan matematika dengan mata pelajaran lain dan hubungan matematika dengan kehidupan sehari-hari atau dunia nyata. Penelitian ini bertujuan untuk mengetahui : ada atau tidak ada perbedaan kemampuan koneksi matematis kelompok siswa yang menggunakan pembelajaran matematika kontekstual dengan kelompok siswa yang menggunakan pembelajaran konvensional; mengetahui ada atau tidak ada perbedaan kemampuan koneksi matematis antara kelompok siswa laki-laki dengan kelompok siswa perempuan baik kelas eksperimen maupun kelas kontrol; ada atau tidak ada pengaruh pembelajaran matematika kontekstual terhadap kemampuan kemampuan koneksi matematis siswa SMA berbasis gender. Penelitian yang digunakan adalah penelitian menggunakan desain faktorial yang merupakan modifikasi dari design true experimental. Penelitian ini dilakukan di SMA Negeri 1 Sigli. Teknik pengambilan data menggunakan tes kemampuan koneksi matematis siswa laki-laki dan perempuan melalui pendekatan kontekstual yang berupa soal yaitu pretes dan postes yang dilakukan sebelum dan sesudah diberikan pembelajaran di kelas eksperimen. Teknik analisis data menggunakan Analisis of Varians (Anova) setelah memenuhi uji prasyarat parametris (normalitas dan homogenitas), dengan bantuan program perhitungan SPSS 17.0 for windows.
Waste water that comes out of the milling process latex factory so many and has not been utilized, often becomes a problem for the environment if the handling is not optimal. This wastewater is known as latex serum. Latex serum can be used as an alternative coagulant because it has a low pH and containing metal ions. Low pH will lower the pH of the latex to the isoelectric point and cations of alkali metals will reduce electro kinetic potential latex, so latex becomes frozen. Research purposes to determine the length of time coagulation of latex, yield of coagulum and yield dry rubber. Research conducted at the Laboratory of Plant Production at Politeknik Negeri Lampung. The material used are latex serum and latex and other materials. The equipment used is the coagulation bath, digital pH meter, a wooden spatula, milling, stopwatch, and other analysis tools. The research tested in completely randomized design with one independent variable used is composed of coagulant doses: 0%, 4%, 8%, 12%, 16% and 20% v/v and replicated 3 times. The observation are pH of latex serum, pH oflatex, coagulation time, and yield dry rubber. The result showed that for pH of latex serum is 4.9, pH of latex is 6.22, the best doses to coagulation is 20% with time to coagulation 17 minute time, coagulum yield of 59.83 and dry rubber yield of 42.10.Keywords: coagulant, latex coagulation, latex serumPermalink:Â http://jurnal.polinela.ac.id/index.php/AIP/article/view/36
Dietary fiber with a high fermentability can be considered as prebiotic.Â Inulin and Fructo-ligosaccharides has been well known as prebiotic resources. Dietary fibre with lower fermentability has a better laxative effect. Green cincau (Premna oblongifolia Merr.) as one of dietary fibre that contains pectin as itâs main gel forming agent. The previous study showed that pectin has a prebiotic function because it could increase beneficial bacteria level in digestion system with fermentability between 50% to 100%. The objective of this research was to compare the prebiotic function ofÂ green cincauâs gel forming agent extract in increasing the lactic acid bacteria and itâs laxative effect (faecal proportion and faecal consistency) with a commercial prebiotic resource (inulin). This research was designed in a completely randomized block design, with a single treatment (different fiber resource added to the diets : green cincauâs gel forming agent extract, inulin, and selulose)). The results showed that green cincauâs gel forming agent extract has a lower prebiotic function but has a higher laxative effect if compared to commercial prebiotic (inulin) with total lactic acid bacteriaÂ was 11.97,Â Â the pH of the digesta wasÂ 6.27, and fecal proportion was 6.296%.
Obstacles factor to get natural rubber raw materials is less efficient for latex processing into concentrated latex, because it need a long time that 2-3 weeks. Centrifugation method many used by concentrated latex factory because it can concentrate the latex with a short relatively time. While the weakness of the centrifugation method is more expensive if that compared with the curdling. With the weakness centrifugation method and curdling, in this research, making the concentrated latex are used vibration method, with the addition of curdle. The purpose of this research is to get the optimum vibrations speed for the concentrated latex manufactured, the speed of the vibrations are used 150 rpm, 175 rpm, 200 rpm, 225 rpm and 250 rpm. The design are used in this research is Randomized Block Design with 6 treatments was repeated 4 times, then obtained 24 units of the experiment, if there is a real difference, then used the BNT at the level of 5% and the data analysis process using Minitab version 16. the most optimum RPM are used in this research is 225 with a quality approaching the standard. Keywords: latex, concentrated latex, vibration, cmc
Serve is a part of action/service for others to be able to meet the needs and desires. Customers satisfaction might be checked by comparing the expectations of consumers with the desired quality of service what they receive in fact. This research was conducted to find out how customer satisfaction with the quality of service the management of Grand City Balikpapan. Research used qualitative methods. Data sources are secondary and primary data. Data collection techniques through interviews, observation, documentation and triangulation. Data collection instruments through the interview grid with the 5W + 1H method. The validity of the data was examined through triangulation and data analysis techniques using data reduction, data display and drawing conclusions or verification (conlusion drawing / verification). Finally Grand City Balikpapan consumers have been satisfied with the quality of service provided by the Sinarmas Land Group management.
This article is written based on the thesis entitled ?The Development of Leaflet Media for Local History Teaching Media? Grade XI at Senior High School (SMA) 6 Padang. This research is a developmental research, carried out because the students are yet to utilize the textbook as well as the other reading materials containing the relevant learning materials, thus their learning experience is less meaningful. The purpose of this research is to reveal the eligibility and practicality of leaflet as a History teaching material. The research method refers to the mechanisms introduced by Borg and Gall. The objects of this research are the students of Sekolah Menengah Atas Negeri 6 Padang grade XI Social Science 4 whose number is 27 students, with 2 lecturers as the expert in material validators and 2 History teachers in grade XI Senior High School No. 6 Padang.according to the feedback from the students and teachers, the leaflet is eligible and practical to be used in the teaching and learning process of Japanese Colonialization.
Smoke liquid for latex coagulant is one of the solution to avoid the negative impact of not recomended coagulant such as vinegar, TSP fertilizer and alum. Coconut fiber has lignin content so that it can be processed into liquid smoke. The aim of this study was to determination the best dose of coconut fiber liquid smoke for latex coagulant and the effect on the quality of SIR product. The treatment used in this study was the dose of coconut coir liquid smoke (formic acid (control) 4.76% v/v, 13.04% v/v, 14.89% v/v, 16.67% v/v, 18 v/v, 36% v/v, and 20% v/v). The results showed that the coconut fiber liquid smoke with dose 20% v/v gave the best result on time for clumping latex, total coagulum and total rubber yield. Based on quality data, a dose of 20% v/v include SIR 20 quality.
Waste water that comes out of the milling process latex factory so many and has not been utilized, often becomes a problem for the environment if the handling is not optimal. This wastewater is known as latex serum. Latex serum can be used as an alternative coagulant because it has a low pH and containing metal ions. Low pH will lower the pH of the latex to the isoelectric point and cations of alkali metals will reduce electro kinetic potential latex, so latex becomes frozen. Research purposes to determine the length of time coagulation of latex, yield of coagulum and yield dry rubber. Research conducted at the Laboratory of Plant Production at Politeknik Negeri Lampung. The material used are latex serum and latex and other materials. The equipment used is the coagulation bath, digital pH meter, a wooden spatula, milling, stopwatch, and other analysis tools. The research tested in completely randomized design with one independent variable used is composed of coagulant doses: 0%, 4%, 8%, 12%, 16% and 20% v/v and replicated 3 times. The observation are pH of latex serum, pH oflatex, coagulation time, and yield dry rubber. The result showed that for pH of latex serum is 4.9, pH of latex is 6.22, the best doses to coagulation is 20% with time to coagulation 17 minute time, coagulum yield of 59.83 and dry rubber yield of 42.10.Keywords: coagulant, latex coagulation, latex serumPermalink: http://jurnal.polinela.ac.id/index.php/AIP/article/view/36
CV. Widodo Group yang berlokasi di Kecamatan Tanjung Senang, Bandar Lampung merupakan usaha yang bergerak di bidang penyewaan alat pesta. Pada CV. Widodo Group saat ini, untuk penyewaan alat-alat pesta dilakukan dengan cara menghubungi pemilik bisa lewat hubungan telpon maupun bisa datang ke pemilik, adapun sering mengalami kendala dan kesulitan serta keterlambatan dalam proses penyewaan alat-alat pesta. Tujuan dari penelitian ini adalah pelanggan dengan mudah mendapatkan informasi tetang penyewaan alat-alat pesta secara cepat dan efisien. Dari permasalahan di atas maka penulis merancang sebuah sistem informasi berbasis web dan basis data dengan menggunakan database MySQL. Metode pengembangan sistem yang digunakan extreme programming, yang memiliki keunggulan pengembangan sistem yang lebih cepat dan proses pengembangan lebih responsive terhadap kebutuhan pelanggan. Data untuk penelitian ini dikumpulkan melalui teknik observasi atau pengamatan, wawancara dan studi pustaka. Data yang digunakan adalah berasal dari populasi dan sampel yang terdiri dari pemilik, karyawan dan pelanggan. Hasil dari penelitian maka diperoleh program sistem informasi penyewaan alat pesta berbasis web. Dengan sistem ini pelanggan dapat dengan mudah mendapatkan layanan informasi penyewaan alat dengan cepat selain itu proses pembuatan laporan data pelanggan dapat dilakukan dengan cepat dan akurat tanpa harus membuat secara manual oleh perusahaan. Hal ini dapat meningkatkan kinerja dalam hal pelayanan pelanggan, sehingga dapat meningkatkan keuntungan dalam segi waktu maupun efesiensi pekerjaan.