Penerapan Model Pembelajaran Kooperatif Tipe Student Teams Achievemnt Division (Stad) Untuk Meningkatkan Hasil Belajar Siswa Pada Pembelajaran IPS Kelas IV Sdn Bibis Tandes Surabaya

Latar belakang dari penelitian ini adalah untuk mengetahui rendahnya hasil belajar siswa pada mata pelajaran IPS. Hal ini mungkin dikarenakan ketidaktepatan model pembelajaran yang digunakan guru dalam proses pembelajaran. Dalam hal ini, guru langsung meminta siswa untuk membuka buku paket IPS, pembelajaran masih berpusat pada guru, dan siswa sebagai penerima informasi (pasif). Tujuan penelitian ini adalah mendeskripsikan aktivitas guru, murid dan hasil belajar siswa selama proses pembelajaran IPS dengan menerapkan model pembelajaran kooperatif tipe STAD. Penelitian ini menggunakan metode penelitian tindakan kelas (PTK). Subjek dari penelitian ini adalah 40 siswa dengan perincian 21 siswa perempuan dan 19 siswa laki-laki. Instrumen penelitian menggunakan lembar observasi dan lembar tes. Teknik analisis dapat menggunakan deskriptif kuantitatif dan deskriptif kualitatif. Hasil dari penelitian ini menunjukkan bahwa aktivitas guru mengalami peningkatan selama dua siklus. Siklus pertama memperoleh sebesar 73,2% dan siklus kedua memperoleh sebesar 92,9%. Pada siklus pertama persentase aktivitas siswa sebesar 70% dan pada siklus kedua persentase aktivitas siswa juga menunjukkan kemajuan sebesar 92,5%. Persentase ketuntasan klasikal siswa pada siklus I sebesar 72,5% dan persentase ketuntasan klasikal siswa pada siklus II sebesar 90%. Berdasarkan hasil penelitian tersebut, penulis menyimpulkan bahwa penerapan model pembelajaran kooperatif tipe STAD dapat meningkatkan hasil belajar siswa kelas IV SDN Bibis Tandes Surabaya

Review on automated follicle identification for polycystic ovarian syndrome

Polycystic Ovarian Syndrome (PCOS), is a condition of the ovary consisting numerous follicles. Accurate size and number of follicles detected are crucial for treatment. Hence the diagnosis of this condition is by measuring and calculating the size and number of follicles existed in the ovary. To diagnosis, ultrasound imaging has become an effective tool as it is non invasive, inexpensive and portable. However, the presence of speckle noise in ultrasound imaging has caused an obstruction for manual diagnosis which are high time consumption and often produce errors. Thus, image segmentation for ultrasound imaging is critical to identify follicles for PCOS diagnosis and proper health treatment. This paper presents different methods proposed and applied in automated follicle identification for PCOS diagnosis by previous researchers. In this paper, the methods and performance evaluation are identified and compared. Finally, this paper also provided suggestions in developing methods for future research

Comparative mechanical properties study of resin infusion versus hand laminating for the construction of 12-ft fishing boat

Resin Infusion is widely used to produce fiber-reinforced materials. In the process, the resin enters a close mold containing the dry fiber performed by pressure difference. This study is about finding the comparison of the tensile strength, compression strength and flexural strength between resin infusion technique and conventional hand laminating for the construction of a 12-feet fishing boat. Both boat were applied with the same composite matrices. All testing was done in accordance to the standard ASTM D3039, D3039M, ASTM D695-02a and ASTM D790-07. The result showed that the resin infusion technique produced better result upon ultimate tensile strength (27% better) but slightly less satisfactory for in compressive stress (12% lower) and flexural stress (34% lower). Even though resin infusion was only better in tensile strength, physically the product is more lightweight with a better resin-to-fiber ratio

Optimised combinatorial control strategy for active anti-roll bar system for ground vehicle

The objective of this paper is to optimise the proposed control strategy for an active anti-roll bar system using non-dominated sorting genetic algorithm (NSGA-II) tuning method. By using an active anti-roll control strategy, the controller can adapt to current road conditions and manoeuvres unlike a passive anti-roll bar. The optimisation solution offers a rather noticeable improvement results compared to the manually-tuned method. From the application point of view, both tuning process can be used. However, using optimisation method gives a multiple choice of solutions and provides the optimal parameters compared to manual tuning method

Cohomology of skew-holomorphic Lie algebroids

We introduce the notion of skew-holomorphic Lie algebroid on a complex manifold, and explore some cohomologies theories that one can associate to it. Examples are given in terms of holomorphic Poisson structures of various sorts.Comment: 16 pages. v2: Final version to be published in Theor. Math. Phys. (incorporates only very minor changes

Cost-effectiveness of remote haemodynamic monitoring by an implantable pulmonary artery pressure monitoring sensor (CardioMEMS-HF system) in chronic heart failure in the Netherlands

Aims: Remote haemodynamic monitoring with an implantable pulmonary artery (PA) sensor has been shown to reduce heart failure (HF) hospitalizations and improve quality of life. Cost-effectiveness analyses studying the value of remote haemodynamic monitoring in a European healthcare system with a contemporary standard care group are lacking. Methods and results: A Markov model was developed to estimate the cost-effectiveness of PA-guided therapy compared to the standard of care based upon patient-level data of the MONITOR-HF trial performed in the Netherlands in patients with chronic HF (New York Heart Association class III and at least one previous HF hospitalization). Cost-effectiveness was measured as the incremental cost per quality-adjusted life year (QALY) gained from the Dutch societal perspective with a lifetime horizon which encompasses a wide variety of costs including costs of hospitalizations, monitoring time, telephone contacts, laboratory assessments, and drug changes in both treatment groups. In the base-case analysis, PA-guided therapy increased costs compared to standard of care by €12 121. The QALYs per patient for PA-guided therapy and standard of care was 4.07 and 3.481, respectively, reflecting a gain of 0.58 QALYs. The resulting incremental cost-effectiveness ratio was €20 753 per QALY, which is below the Dutch willingness-to-pay threshold of €50 000 per QALY gained for HF. Conclusions: The current cost-effectiveness study suggests that remote haemodynamic monitoring with PA-guided therapy on top of standard care is likely to be cost-effective for patients with symptomatic moderate-to-severe HF in the Netherlands.</p

Cost-effectiveness of remote haemodynamic monitoring by an implantable pulmonary artery pressure monitoring sensor (CardioMEMS-HF system) in chronic heart failure in the Netherlands

Aims: Remote haemodynamic monitoring with an implantable pulmonary artery (PA) sensor has been shown to reduce heart failure (HF) hospitalizations and improve quality of life. Cost-effectiveness analyses studying the value of remote haemodynamic monitoring in a European healthcare system with a contemporary standard care group are lacking. Methods and results: A Markov model was developed to estimate the cost-effectiveness of PA-guided therapy compared to the standard of care based upon patient-level data of the MONITOR-HF trial performed in the Netherlands in patients with chronic HF (New York Heart Association class III and at least one previous HF hospitalization). Cost-effectiveness was measured as the incremental cost per quality-adjusted life year (QALY) gained from the Dutch societal perspective with a lifetime horizon which encompasses a wide variety of costs including costs of hospitalizations, monitoring time, telephone contacts, laboratory assessments, and drug changes in both treatment groups. In the base-case analysis, PA-guided therapy increased costs compared to standard of care by €12 121. The QALYs per patient for PA-guided therapy and standard of care was 4.07 and 3.481, respectively, reflecting a gain of 0.58 QALYs. The resulting incremental cost-effectiveness ratio was €20 753 per QALY, which is below the Dutch willingness-to-pay threshold of €50 000 per QALY gained for HF. Conclusions: The current cost-effectiveness study suggests that remote haemodynamic monitoring with PA-guided therapy on top of standard care is likely to be cost-effective for patients with symptomatic moderate-to-severe HF in the Netherlands.</p

Vertebral artery dissection presenting as a Brown-Séquard syndrome: a case report

<p>Abstract</p> <p>Introduction</p> <p>Vertebral artery dissection has become increasingly recognized as an important cause of stroke. It usually presents with posterior headache or neck pain followed within hours or days by signs of posterior circulation stroke. To the best of our knowledge, the clinical presentation of a Brown-Séquard syndrome with a vertebral artery dissection has been reported only once before.</p> <p>Case presentation</p> <p>An otherwise healthy 35-year-old man presented with acute left-sided weakness. He had experienced left-sided posterior neck pain after a 4-hour flight 4 weeks previously. Physical examination was consistent with a left Brown-Séquard syndrome. Magnetic resonance angiography showed evidence of left vertebral artery dissection. He improved after therapy with anticoagulants.</p> <p>Conclusion</p> <p>We report a case of an unusual presentation of a relatively uncommon condition. This diagnosis should be considered early in relatively young patients with stroke-like symptoms or unexplained neck pain, because missing a dissection can result in adverse outcomes.</p

From Atiyah Classes to Homotopy Leibniz Algebras

A celebrated theorem of Kapranov states that the Atiyah class of the tangent bundle of a complex manifold $X$ makes $T_X[-1]$ into a Lie algebra object in $D^+(X)$, the bounded below derived category of coherent sheaves on $X$. Furthermore Kapranov proved that, for a K\"ahler manifold $X$, the Dolbeault resolution $\Omega^{\bullet-1}(T_X^{1,0})$ of $T_X[-1]$ is an $L_\infty$ algebra. In this paper, we prove that Kapranov's theorem holds in much wider generality for vector bundles over Lie pairs. Given a Lie pair $(L,A)$, i.e. a Lie algebroid $L$ together with a Lie subalgebroid $A$, we define the Atiyah class $\alpha_E$ of an $A$-module $E$ (relative to $L$) as the obstruction to the existence of an $A$-compatible $L$-connection on $E$. We prove that the Atiyah classes $\alpha_{L/A}$ and $\alpha_E$ respectively make $L/A[-1]$ and $E[-1]$ into a Lie algebra and a Lie algebra module in the bounded below derived category $D^+(\mathcal{A})$, where $\mathcal{A}$ is the abelian category of left $\mathcal{U}(A)$-modules and $\mathcal{U}(A)$ is the universal enveloping algebra of $A$. Moreover, we produce a homotopy Leibniz algebra and a homotopy Leibniz module stemming from the Atiyah classes of $L/A$ and $E$, and inducing the aforesaid Lie structures in $D^+(\mathcal{A})$.Comment: 36 page