Penerapan Model Problem Based Learning (PBL) pada Materi Program Linear untuk Meningkatkan Hasil Belajar Siswa

[Title: The Application of Problem Based Learning (PBL) Models to Linear Program Materials to Improve Student Learning Outcomes]. This research is a classroom action research that aims to improve the learning outcomes of linear programs through the application of the problem based learning model of class XII students of SMA N 1 Wewewa Utara in the odd semester of the academic year 2017/2018 with 36 students. Cycle I was held for 5 meetings and Cycle II was carried out for 4 meetings including the giving of the final test of Cycle I and Cycle II. Data retrieval is done using learning outcomes tests and observation sheets. The collected data were analyzed using quantitative and qualitative analysis. The results of this study indicate that (1) the value of classical completeness of learning outcomes of students of class XII IPA of SMA N. 1 Wewewa Utara at the end of the first cycle test was 61.11% with sufficient categories while the value of classical completeness of student learning outcomes in cycle II was 83.3% with a very good category and (2) The learning outcomes of students of class XII Natural Sciences at SMAN 1 North Wewewa in cycle I to Cycle II increased by 22.19% through the application of the problem based learning model

Lari Berbeban 1 Kg pada Kaki 100 M 4 Repetisi Meningkatkan Kecepatan Tendangan Mawashi Geri Dojo SMP St. Theresia

The purpose of this study was to determine running training with a load of 1 kg at 100 m 4 legs. Repetitions Increase Mawashi Geri's Kicking Speed ​​at Dojo Karateka SMP St. Theresia-Kupang City. This research method is an experimental method with the design research design is one group pre-test and post-test design. This research was conducted on Karate members at the Dojo SMP St. Theresia-Kota Kupang. The time used in implementing the training program is 6 weeks. The population in this study were Karate athletes. Sampling using random sampling technique (lottery), so that the sample used amounted to 10 people. Data collection techniques using action tests and documentation. Data analysis using the t-test formula. The results of data analysis showed that the mean of the initial test = 32.9, the mean of the final test = 42.9 and the result of the t-count = 43.455. The calculation result is then compared to df = N-1 (10-1) = 9. Then it is obtained 1,833 at the 5% significance level. It means that t-count (43.455)> t-table (1.833), which means that the alternative hypothesis / Ha is "accepted" while the null hypothesis / Ho is "rejected", because the value of t-count> t-table. Running training with a load of 1 kg on the leg 100 m 4 reps can increase the kick speed of mawashi geri karate athletes Keywords: Running, Speed, Mawashi Geri's Kic

Nonlinear evolution of dark matter and dark energy in the Chaplygin-gas cosmology

The hypothesis that dark matter and dark energy are unified through the Chaplygin gas is reexamined. Using generalizations of the spherical model which incorporate effects of the acoustic horizon we show that an initially perturbative Chaplygin gas evolves into a mixed system containing cold dark matter-like gravitational condensate.Comment: 11 pages, 3 figures, substantial revision, title changed, content changed, added references, to appear in JCA

Identifying structure-absorption relationships and predicting absorption strength of non-fullerene acceptors for organic photovoltaics

Non-fullerene acceptors (NFAs) are excellent light harvesters, yet the origin of their high optical extinction is not well understood. In this work, we investigate the absorption strength of NFAs by building a database of time-dependent density functional theory (TDDFT) calculations of ∼500 π-conjugated molecules. The calculations are first validated by comparison with experimental measurements in solution and solid state using common fullerene and non-fullerene acceptors. We find that the molar extinction coefficient (εd,max) shows reasonable agreement between calculation in vacuum and experiment for molecules in solution, highlighting the effectiveness of TDDFT for predicting optical properties of organic π-conjugated molecules. We then perform a statistical analysis based on molecular descriptors to identify which features are important in defining the absorption strength. This allows us to identify structural features that are correlated with high absorption strength in NFAs and could be used to guide molecular design: highly absorbing NFAs should possess a planar, linear, and fully conjugated molecular backbone with highly polarisable heteroatoms. We then exploit a random decision forest algorithm to draw predictions for εd,max using a computational framework based on extended tight-binding Hamiltonians, which shows reasonable predicting accuracy with lower computational cost than TDDFT. This work provides a general understanding of the relationship between molecular structure and absorption strength in π-conjugated organic molecules, including NFAs, while introducing predictive machine-learning models of low computational cost

Antiphospholipid syndrome; its implication in cardiovascular diseases: a review

Antiphospholipid syndrome (APLS) is a rare syndrome mainly characterized by several hyper-coagulable complications and therefore, implicated in the operated cardiac surgery patient. APLS comprises clinical features such as arterial or venous thromboses, valve disease, coronary artery disease, intracardiac thrombus formation, pulmonary hypertension and dilated cardiomyopathy. The most commonly affected valve is the mitral, followed by the aortic and tricuspid valve. For APLS diagnosis essential is the detection of so-called antiphospholipid antibodies (aPL) as anticardiolipin antibodies (aCL) or lupus anticoagulant (LA). Minor alterations in the anticoagulation, infection, and surgical stress may trigger widespread thrombosis. The incidence of thrombosis is highest during the following perioperative periods: preoperatively during the withdrawal of warfarin, postoperatively during the period of hypercoagulability despite warfarin or heparin therapy, or postoperatively before adequate anticoagulation achievement. Cardiac valvular pathology includes irregular thickening of the valve leaflets due to deposition of immune complexes that may lead to vegetations and valve dysfunction; a significant risk factor for stroke. Patients with APLS are at increased risk for thrombosis and adequate anticoagulation is of vital importance during cardiopulmonary bypass (CPB). A successful outcome requires multidisciplinary management in order to prevent thrombotic or bleeding complications and to manage perioperative anticoagulation. More work and reporting on anticoagulation management and adjuvant therapy in patients with APLS during extracorporeal circulation are necessary

Follicular fluid content and oocyte quality: from single biochemical markers to metabolomics

The assessment of oocyte quality in human in vitro fertilization (IVF) is getting increasing attention from embryologists. Oocyte selection and the identification of the best oocytes, in fact, would help to limit embryo overproduction and to improve the results of oocyte cryostorage programs. Follicular fluid (FF) is easily available during oocyte pick-up and theorically represents an optimal source on non-invasive biochemical predictors of oocyte quality. Unfortunately, however, the studies aiming to find a good molecular predictor of oocyte quality in FF were not able to identify substances that could be used as reliable markers of oocyte competence to fertilization, embryo development and pregnancy. In the last years, a well definite trend toward passing from the research of single molecular markers to more complex techniques that study all metabolites of FF has been observed. The metabolomic approach is a powerful tool to study biochemical predictors of oocyte quality in FF, but its application in this area is still at the beginning. This review provides an overview of the current knowledge about the biochemical predictors of oocyte quality in FF, describing both the results coming from studies on single biochemical markers and those deriving from the most recent studies of metabolomic

D. Bili (illustrateur non identifié 19..-) : signature “d. Bili” [1939]

D. Bili (illustrateur non identifié 19..-) : signature “d. Bili” [1939]. Aucune information sur cet artiste ; artiste absent des dictionnaires spécialisés et des banques de données