PENGARUH MULTIMEDIA PEMBELAJARAN INTERAKTIF BERBASIS CAI MODEL TUTORIAL TERHADAP HASIL BELAJAR SISWA PADA MATERI ALGORITMA PEMROGRAMAN

Penelitian ini bertujuan untuk mengetahui pengaruh multimedia pembelajaran interaktif berbasis Computer Assisted Instruction model tutorial terhadap hasil belajar siswa pada Mata Pelajaran Pemrograman Dasar dengan materi Algoritma Pemrograman. Penilaian hasil belajar hanya menekankan pada aspek kognitif yang meliputi pengetahuan dan pemahaman. Penelitian ini juga bertujuan untuk mengetahui respon siswa terhadap pembelajaran dengan menggunakan multimedia dan untuk mengetahui kelayakan multimedia dari penilaian para ahli serta untuk mengetahui penilaian siswa terhadap multimedia. Metode penelitian ini menggunakan metode penelitian kuantitatif dan kualitatif. Penelitian ini dilaksanakan di Kelas X RPL 2 SMKN 4 Tasikmalaya. Data awal penelitian ini didapat dari hasil wawancara, observasi, dan pengisian angket survey pendahuluan penelitian terhadap guru dan siswa. Kemudian, data penilaian kelayakan multimedia didapat dari pengisian instrumen kelayakan multimedia oleh para ahli. Instrumen kelayakan multimedia ini menggunakan instrumen Learning Object Review Instrument (LORI). Lalu, data penilaian siswa terhadap multimedia diperoleh dari pengisian angket oleh siswa yang dirancang oleh Wahono. Untuk data hasil belajar siswa diperoleh dari perhitungan nilai pre-test dan post-test. Hasil dari penelitian ini yaitu: 1) Seluruh siswa mengalami peningkatan hasil belajar setelah menggunakan multimedia, dengan rata-rata peningkatan hasil belajar sebesar 0.61 atau 61% dengan kategori peningkatan Sedang; 2) Multimedia dinilai Sangat Baik dan layak digunakan dengan rata-rata persentase kelayakan sebesar 76.67% oleh ahli media dan 83.33% oleh ahli materi; 3) Siswa memberikan penilaian yang baik terhadap multimedia dengan rata-rata persentase sebesar 81.70% yang termasuk kedalam kategori Sangat Baik. 4) Dengan resiko kesalahan 5% bahwa semakin tinggi respon siswa terhadap multimedia maka semakin tinggi peningkatan (gain) hasil belajar siswa.; The purpose of this research is to know the influence interactive learning multimedia based on Computer Assisted Instruction tutorial model toward the students learning achievement at lesson base programming with programming algorithm. The assessment of the result study just focus to cognitive aspect which comprise knowledge and comprehension. This research also purpose to know the response students to learning with use multimedia and to know advisability multimedia from assessment of the experts also to know the students assessment about multimedia. The method of the research use qualitative method and quantitative method. This research take place in Class X RPL 2 SMKN 4 Tasikmalaya. The first data get from the result of interview, observation, and admission filling questionnaire survey toward teachers and students. Next, multimedia advisability assessment data get from admission filling multimedia advisability questionnaire by the experts. This multimedia advisability questionnaire use the instrument of Learning Object Review Instrument (LORI). Then, the students assessment data toward multimedia get by admission filling questionnaire for sudent has made by Wahono. For the student study result data get from calculation value pretest and post-test. The result from this research that is: 1) All students have experience upgrading the result study after use multimedia, with average upgrading the result study as big as 0.61 or 61% with upgrading category is middle. 2) The value of multimedia is very good and proper to use with average advisability percentage as big as 76.67% by media experts and 83.33% by content experts. 3) The students give a good assessment toward multimedia with percentage average as big as 81.70% which included category very good. 4) With a 5% risk of error that the higher the students response to the higher multimedia enhancement (gain) of student learning achievement

Kepuasan Nasabah Kredit Berpenghasilan Tetap

One sector that became the belle of the target banks claim is the consumption sector. In the banking sector given the level of consumption of a very small risk, plus the pattern offered by the consumption sector was so tempting. The purpose of this study are: 1) To determine the level of customer satisfaction of fixed-income credit (Kretap) at the BRI branch Telukbetung with the implementation of external marketing company; 2) To determine what factors are causing customersof Kretap at Telukbetung BRI branch is satisfied or not satisfied. Research design used is descriptive research. Study sample is 10% of the number of customers at the BRI branch Kretap Telukbetung of 97 respondents. Analysis conducted by the descriptive method the percentage technique. The results showed that customer satisfaction at the BRI branch Telukbetung reached 72% of the expected, with enough categories to satisfy customers. Factors that satisfy customers include interest rates in Kretap, easy to reach location of BRI, the ease in obtaining loans Kretap, staff skills in customer service, staff friendliness and courtesy, and attention in handling customer complaints. While the factors that are less satisfying customers include credit plafond, credit duration, and breadth of the office network (units/on line).Salah satu sektor yang menjadi primadona target garapan perbankan adalah sektor konsumsi. Dalam perbankan sektor konsumsi memberikan tingkat risiko yang sangat kecil, ditambah lagi pola yang ditawarkan oleh sektor konsumsi pun begitu menggiurkan. Tujuan penelitian ini adalah: 1) Untuk mengetahui tingkat kepuasan nasabah kredit berpenghasilan tetap (Kretap) pada BRI Cabang Telukbetung terhadap pelaksanaan pemasaran eksternal perusahaan; 2)  Untuk mengetahui faktor-faktor apa saja yang menyebabkan nasabah pinjaman Kretap pada BRI Cabang Telukbetung merasa puas atau tidak puas. Rancangan penelitian yang digunakan adalah riset deskriptif. Sampel penelitian adalah 10 % dari jumlah nasabah Kretap pada BRI Cabang Telukbetung sebanyak 97 responden. Analisis dilakukan secara metode deskriptif dengan teknik persentase. Hasil penelitian menunjukkan bahwa kepuasan Nasabah Kretap pada BRI Cabang Telukbetung baru mencapai 72 % dari yang diharapkan, dengan kategori cukup memuaskan nasabah.  Faktor-faktor yang memuaskan nasabah di antaranya adalah dalam hal suku bunga Kretap, kemudahan menjangkau lokasi BRI, kemudahan dalam memperoleh pinjaman Kretap, keterampilan petugas dalam melayani nasabah, keramahan dan kesopanan petugas, dan perhatian dalam penanganan keluhan nasabah. Sedangkan faktor-faktor yang kurang memuaskan nasabah di antaranya adalah plafond Kretap, jangka waktu Kretap, dan keluasan jaringan kantor (unit/on line).

The role of stoichiometric vacancy periodicity in pressure-induced amorphization of the Ga2SeTe2 semiconductor alloy

We observe that pressure-induced amorphization of Ga2SeTe2 (a III-VI semiconductor) is directly influenced by the periodicity of its intrinsic defect structures. Specimens with periodic and semi-periodic two-dimensional vacancy structures become amorphous around 10-11 GPa in contrast to those with aperiodic structures, which amorphize around 7-8 GPa. The result is a notable instance of altering material phase-change properties via rearrangement of stoichiometric vacancies as opposed to adjusting their concentrations. Based on our experimental findings, we posit that periodic two-dimensional vacancy structures in Ga2SeTe2 provide an energetically preferred crystal lattice that is less prone to collapse under applied pressure. This is corroborated through first-principles electronic structure calculations, which demonstrate that the energy stability of III-VI structures under hydrostatic pressure is highly dependent on the configuration of intrinsic vacancies

Heavy Metals Distribution and Speciation in Soils around a Mega Cement Factory in North-Central Nigeria

Surface and sub-surface soils were sampled in the neighbourhood environment of an ultra-modern and largest cement factory in Nigeria. The five geochemical fractions investigated were exchangeable, carbonate, Fe-Mn oxide, organic matter and residual. All fractions were subsequently analyzed for lead (Pb), copper (Cu), zinc (Zn), manganese (Mn) and iron (Fe) using atomic absorption spectrophotometer. The average total metals concentrations (mg/Kg) in the surface soil were 1063.8± 261 for Fe, 30.29 ± 19.25 for Mn, 24.15 ± 21.69 for Cu, 15.08 ± 11.95 for Pb and 8.54 ± 3.18 for Zn. Relatively lower mean concentrations were measured in the sub-surface soil samples. The percent distribution concentration of the various metals in the residual fraction ranged from 0.23 to 69.48% for Pb, 0.85 to 75.30% for Cu, 36.02 to 83.86% for Zn, 12.97 to 44.04% for Mn and 18.11 to 57.25% for Fe. Factor analysis revealed that while Pb, Cu and Zn would majorly be of anthropogenic origin, Mn and Fe are mainly of natural origin. Pb was found to be the most mobile with mobility factor of 71.8% while Fe has the least mobility factor of 3.62%. Regression analysis (r2 = 0.71) further showed that Cu is correlated with Pb. Soil pollution indices revealed that the surface soil is slightly contaminated in lead and zinc, and moderately contaminated in copper.Key words: Heavy metals speciation, Mobility factor, Soil pollution, Cement industr

Epidemiology of Hepatitis C Virus in the private blood banking sector in Osogbo, Southwest Nigeria

Background: Hepatitis C Virus (HCV) is an agent of Transfusion Transmissible Infection (TTI) which serves as a threat to blood safety and sufficiency of blood and blood products supply.Objectives: This study aimed at determining the distribution patterns of HCV among potential blood donors in a private Blood Bank in Osogbo, Nigeria.Materials and Methods: Over a period of 6 months, 290 consenting prospective blood donors were recruited for this study by convenient sampling technique. Pre-test counseling was done, before blood specimen collection and laboratory serological analysis was carried out, using third generation Enzyme Immunoassay Technique.Results: The mean age of the respondents was 35.99 ±10.94 years. A total of 6 participants (2.07%) tested positive for anti-HCV. In this study, HCV prevalence has no association with age and blood type, but it does with the donor type, where the prevalence is higher among commercial blood donors.Conclusion: The rates were lower than the previous studies in Nigeria perhaps this is due to the positive effect of public awareness on transfusion transmissible infections and the fact that majority of the donors were regular donors. Blood transfusion services should be further strengthened by establishment of blood transfusion committees at State level, to regulate and monitor the practice, especially in the private sector, with a view to ensure that stringent criteria are adhered to in blood donors’ selection.Keywords: Blood Safety, Hepatitis C Virus, Serology and Private sector

Effect of the method of processing on quality and oxidative stability of anhydrous butter fat (samn)

In this study four samn samples prepared from cow milk using two processing methods (traditional T1, T2 and factory processed T3, T4) were investigated for their physico-chemical properties, fatty acids composition, oxidative stability and sensory properties. The traditionally processed samples showed a significance difference (p < 0.05) in peroxide value and acid value in comparison to factory processed ones. The peroxide value was 2.5 meq O2/kg of samn for both T3 and T4 samples, which was higherthan the peroxide value of T1 and T2, which was 1.5 and 2.0, respectively. The acid value of T3, T4, T1 and T2 are 2.58, 2.54, 1.122 and 1.121, respectively. The results showed that the FFA% of T3, T4, T1 andT2 are 1.29, 1.27, 0.6 and 0.6, respectively. The major fatty acids of the four samn samples were palmitic, oleic, stearic, myristic and capric acid. T3 and T4 contain high percentage of palmitc acid 37.29 and 39.23%, respectively. Traditionally processed sample T1 contains high amount of oleic acid (26.1%) in comparison with the other three samples. Method of processing affects samn properties, quality and oxidative stability, where traditionally processed samples were significantly preferred (P 0.05) by the panelists for their color, odor, taste and overall acceptability to the factory processed samples

Penerapan model cooperative learning tipe giving question and getting answer untuk meningkatkan aktivitas belajar siswa pada mata pelajaran Akidah Akhlak pokok bahasan indahnya berprilaku terpuji: penelitian tindakan kelas di kelas IV MI Cibitung Kecamatan Curugkembar Kabupaten Sukabumi

Penelitian ini dilatarbelakangi dari temuan permasalahan yang terjadi di kelas IV MI Cibitung Kecamatan Curugkembar Kabupaten Sukabumi. Berdasarkan hasil observasi didapatkan data bahwa aktivitas belajar siswa rendah. Hal ini terlihat dari banyaknya siswa yang kurang semangat belajar, terdapat juga siswa yang bermain-main dengan teman sebangkunya ketika pembelajaran berlangsung, mereka kurang respon terhadap pertanyaan guru, malas untuk bertanya, malas mencatat, hanya diam saja sehingga berimplikasi pada proses dan hasil belajar yang tidak optimal. Tujuan penelitian ini adalah untuk mengetahui (1) Sejauhmana aktivitas belajar siswa sebelum penerapan Model Cooperative Learning Tipe Giving Question and Getting Answer pada mata pelajaran Akidah Akhlak Pokok Bahasan Indahnya Berprilaku Terpuji, (2) Proses penerapan Model Cooperative Learning Tipe Giving Question and Getting Answer pada mata pelajaran Akidah Akhlak Pokok Bahasan Indahnya Berprilaku Terpuji, (3) Peningkatan aktivitas belajar siswa pada mata pelajaran Akidah Akhlak Pokok Bahasan Indahnya Berprilaku Terpuji sesudah penerapan Model Cooperative Learning Tipe Giving Question and Getting Answer. Penelitian ini didasarkan pada pemikiran bahwa aktivitas belajar siswa ditentukan oleh banyak faktor salah satunya penerapan model Cooperative Learning Tipe Giving Question and Getting Answer. Berdasarkan asumsi tersebut maka hipotesis yang diajukan adalah penerapan Model Cooperative Learning Tipe Giving Question and Getting Answer diduga dapat meningkatkan aktivitas belajar siswa. Metode yang digunakan pada penelitian ini adalah Penelitian Tindakan Kelas yang terdiri dari dua siklus dengan tahapan meliputi perencanaan, pelaksanaan, pengamatan, dan refleksi. Teknik pengumpulan data yang digunakan yaitu observasi dan tes unjuk kerja. Dilengkapi dengan instrumen berupa silabus, RPP, lembar tes unjuk kerja, lembar observasi siswa dan lembar observasi guru. Penelitian dilakukan di kelas IV MI Cibitung sebanyak 20 orang siswa. Hasil penelitian selama lima kali pertemuan menunjukkan peningkatan aktivitas belajar siswa. Hal ini terlihat dari nilai persentase aktivitas siswa sebelum menerapkan model Cooperative Learning tipe Giving Question and Getting Answer hanya sebesar 39,86% dengan kategori kurang sekali, sedangkan setelah menerapkan model Cooperative Learning tipe Giving Question and Getting Answer aktivitas siswa menjadi 85,3% dengan kategori sangat baik

Microbiological quality of some brands of intravenous fluids produced in Nigeria

Microbiological quality of some brands of intravenous fluids produced by some pharmaceutical companies in Nigeria was investigated. Membrane filtration method was used for concentration of contaminating organisms in the intravenous fluids. Thioglycollate medium, Tryptone Soya broth,Brilliant Green Agar, Pseudomonas medium, Mannitol salt agar, MacConkey agar, and Nutrient agar and Saboraud dextrose agar were the media used for the isolation and differentiation of the microbialspecies. Rabbitory method was used for Pyrogen test. Out of 160 samples analyzed, 14 (8.25%) were contaminated and remaining 146 (91.75%) were found sterile. The result of pyrogen test showed that 58(36.25%) of the samples were pyrogenic. Dextrose (5%), peritoneal dialysis and Normal saline were free of detectable microbial species. Contaminating organisms in Dextrose Saline are Microsporum fulvumand Aspergillus sp. In Half strength Darrow’s Bacillus cereus, Klebsiella pneumoniae and Aspergillus sp. were detected. In Half strength Darrow’s, Full strength Darrow’s and Ringer Lactate, the contaminating bacterial species include K. pneumoniae, M. fulvum, Aspergillus sp. and Penicillium sp

Macromixing study for various designs of impellers in a stirred vessel

The effect of the impeller designs and impeller clearance level (C/T) on power consumption, mixing time and air entrainment point in a single liquid phase under turbulent conditions (Re > 104) were investigated. Different impeller designs including conventional and new designs, were used to consider both axial and radial flow impellers. The electric conductivity method, suspended motor system and observation method were employed to determine the mixing time, the power consumption and the air entrainment point, respectively. The reduction in the impeller clearance level form T/3 to T/6 resulted in a decrease in power number values for up-flow pumping impellers while it was increased for down-flow pumping. The same trend was observed for the mixing time results. Moreover, axial flow impellers and specially HE3 are preferable for higher agitation speeds due to the less air entrainment. The results verified that the axial flow impellers and specifically down-flow impellers are more efficient than the radial flow impellers. ANFIS-Fuzzy C–means (ANFIS–FcM) and nonlinear regression were used to develop models to predict the mixing time based on the energy dissipation rate and clearance. The results verified that the model predictions successfully fit the experimental mixing time data