Peningkatan Motivasi Belajar Siswa Pada Tema Pahlawanku Melalui Pemberian Reward Untuk Siswa Kelas IV Sd Muhammadiyah 1 Ketelan Surakarta

Tujuan penelitian tindakan kelas ini adalah untuk meningkatkan motivasi belajar siswa dengan menerapkan pemberian reward atau hadiah pada siswa kelas IV Sd Muhammadiyah 1 Ketelan Surakarta pada tema pahlawanku. Bentuk penelitian ini adalah penelitian tindakan kelas yang terdiri dari dua siklus, tiap siklus terdiri dari empat tahapan yaitu perencanaan, pelaksanaan, pengamatan dan refleksi. Sebagai subjek penelitian adalah guru dan siswakelas IV SD Muhammadiyah 1 Ketelan Surakarta, berjumlah 34 siswa, 17 siswa laki-laki, 17 siswa perempuan. Teknik pengumpulan data menggunakan wawancara ,dokumentasi, dan observasi. Teknik analisis data dilakukan secara deskriptif kualitatif dengan model alir. Berdasarkan hasil penelitian ini, makadapat disimpulkan bahwa melalui penerapan Reward atau hadiah mampu meningkatakan motivasi belajar siswa kelas IV pada tema pahlawanku SD Muhammadiyah 1 Ketelan Surakarta. Hal ini dapat dibuktikan dengan adanya peningkatan motivasi belajar siswa dari sebelum tindakan 40,00%; kemudian pada siklus I menjadi 60,00%; naik menjadi 80,00% padasiklus II. Dengan demikian dalam penelitian ini setiap siklus mengalami peningkatan hasil belajar secara signifikan, sehingga penelitian ini dapat diterim

SYNTHESIS OF MAGNETITE NANOPARTICLES AND EVALUATION OF ITS EFFICIENCY FOR ARSENIC REMOVAL FROM SIMULATED INDUSTRIAL WASTEWATER

In this study the efficiency of magnetic nanoparticles for removal of trivalent arsenic from synthetic industrial wastewater was evaluated. The nanoparticles was prepared by sol-gel method and characterized by X-ray methods including XRD, XRF, and SEM, and vibrating sample magnetometer (VSM). The results showed that synthesized nanoparticles were in the size range of 40-300 nm, purity of about 90%, and magnetization of nanoparticles was 36.5emu/g. In initial conditions including: pH=7, As(III) concentration of 10 mg/L, nanomagnetite concentration of 1g/L, shaking speed of 250 rpm and 20 minute retention time, 82% of As (III) was removed. Competition from common coexisting ions such as Na+, Ni2+, Cu2+, SO42-, and Cl- was ignorable but for NO3- was significant. The adsorption data of magnetite nanoparticles fit well with Freundlich isotherm equations. The adsorption capacity of the Fe3O4 for As (Ill) at pH=7 was obtained as 23.8 mg/g. It was concluded that magnetite nanoparticles have considerable potential in removal of As(III) from synthetic industrial wastewaters

Removal of Cr (VI) from simulated electroplating wastewater by magnetite nanoparticles

زمینه و هدف: کروم به عنوان یکی از مهمترین آلاینده های محیط زیست محسوب می گردد و در غلظت های بالا در پســـاب صنایع آبکاری وجود دارد. نانو ذرات آهن مغناطیسی، با استفاده از مکانیسم های جذب سطحی، تعویض یونی و نیروهای الکترواستاتیک می تواند در کنترل و حذف فلزات سنگین از فاضلاب های صنعتی مورد استفاده قرار گیرد. هدف از انجام این تحقیق بررسی کارآیی نانو ذرات مغناطیسی در حذف کروم شش ظرفیتی (VI) از پساب های شبیه سازی شده صنایع آبکاری و پارامترهای موثر بر آن می باشد. روش بررسی: در این مطالعه تجربی نانو ذرات مگنتیت با استفاده از روش سل- ژل و با افزودن کلرور آهن دو و سه ظرفیتی در محیط مایی و تحت شرایط قلیایی تهیه گردید. سپس تاثیر عوامل موثر بر این فرآیند شامل، غلظت نانو ذره، غلظت اولیه کروم، pH محلول، سرعت اختلاط و زمان تماس، بررسی گردید. برای تعیین حجم نمونه از روش تاگوچی و تحلیل داده ها بر اساس مدل رگرسیون خطی ساده انجام شد. نمونه برداری بر مبنای پروتکل نمونه برداری انجام شد. یافته ها: یافته های این تحقیق نشان داد که در شرایط pH معادل 2، غلظت اولیه کروم ۱۰ میلی گرم بر لیتر، نانو ذرات مگنتیت سنتز شده با دوز 1 گرم بر لیتر، زمان تماس 5 دقیقه و سرعت همزن 250 دور در دقیقه، حدود 82 از کرم (VI) حذف شده بود. راندمان حذف با افزایش سرعت اختلاط افزایش معنی داری داشت (001/0

HUBUNGAN ANTARA BUDAYA ORGANISASI DAN KINERJA KARYAWAN PADA PT.SYAKA PUTRA TRANSINDO JAKARTA

Penelitian ini bertujuan untuk mengetahui budaya organisasi yang ada dalam PT Syaka Putra Transindo Jakarta. Untuk mengetahui tingkat kinerja karyawan  yang ada pada PT Syaka Putra Transindo Jakarta, dan mengetahui apakah terdapat hubungan antara Budaya Organisasi dengan Kinerja Karyawan.  Jenis penelitian ini menggunakan jenis penelitian assosiatif/hubungan,dengan penentuan sampel yaitu sampel jenuh/sensus, metode pengumpulan data yang digunakan adalah Teknik Wawancara, kuesioner dan Observasi. Teknik wawancara dilakukan melakukan wawancara kepada beberapa karyawan untuk mendapatkan informasi, teknik kuesioner dilakukan dengan cara menyebarkan kuesioner kepada 57 karyawan untuk mengumpulkan data dengan meminta setiap karyawan menjawab setiap peryataan yang tertera dikuesioner yang diberikan,  teknik observasi dengan melakukan pengamatan langsung kepada karyawan yang sedang bekerja. Metode analisis data penulis menggunakan teknik kuantitatif yaitu dengan menggunakan uji validitas, uji reabilitas, uji korelasi, uji determinasi dan uji Hipotesis (uji-t).  Dari hasil penelitian menunjukkan bahwa Budaya organisasi yang terdapat di PT Syaka Putra Transindo masih baik. Hal ini dibuktikan oleh hasil analisis statistik deskriptif   jawaban responden, di mana yang paling dominan adalah menjawab setuju yaitu sebesar   46.84 %. Tingkat kinerja karyawan di PT Syaka Putra Transindo Jakarta sudah berada pada kondisi yang baik. Hal ini dibuktikan oleh hasil analisis statistik deskriptif  jawaban responden, di mana yang paling dominan adalah menjawab setuju yaitu sebesar  47.02%. Terdapat hubungan yang positif  kuat antara Budaya organisasi dan Kinerja karyawan di PT Syaka Putra Transindo Jakarta. Hal ini ditunjukan oleh nilai Koefisien korelasi  (r) sebesar 0,73. Kontribusi ( r/KD) Budaya organisasi terhadap Kinerja karyawan di PT Syaka Putra Transindo Jakarta sebesar 53,29%. Tingkat siginifikansi hubungan Budaya organisasi dengan Kinerja karyawan di PT Syaka Putra Transindo Jakarta adalah signifikan. Hal ini ditunjukan oleh t hitung > t tabel ( 7,84 > 2,004 ) Kata Kunci: Budaya Organisasi dan Kinerj

Seed Quality of Greengram Stored in Different Storage Environment

A laboratory experiment was conducted with mungbean seeds kept in three different containers. Three containers were tin pot, poly bag and jute bag and stored at room temperature and RH for three months (23 June-23 September) in the Laboratory of Agronomy Department, Sher-e- Bangla Agricultural University, Dhaka, Bangladesh to study their storage behavior, germination percentage and quality. The seed of jute bag came to the contact with air and their moisture contents was decreased from initial moisture content and remained near to their Equilibrium Moisture content (EMC), moisture content of the seeds of jute bag was found decreased from 7.50% to 16.70% within 6 weeks of storage. But moisture contents of seeds of tin pot and poly bag remained approximate constant throughout 7 weeks period. As tin pot and poly bag was more or less air tight so the seeds of these container could not come to the contact with ambient room air, resulting no significant change of their moisture content. Germination capacity of the seeds of tin pot was found decreased from 78% to 68% and 77% to 58% in the seeds of poly bag. Germination capacity of the seeds of jute bag was found decreased from 73% to 48%t in 5th week of storage. So, the germination capacity was also found a little bit higher than the seeds of other containers. Considering three different container, tin pot container has been proved much more safe and secured than jute bag or poly bag container

Using of a New Carbon Nano Tube Version in Sheet Shape for Water and Wastewater Treatment

Removal of xylene (a toxic compound) from aqueous solution by modified multi wall carbon nano tubes (MWCNT) via silica as sheeted carbon nanotube (SCNT) was evaluated. The physicochemical properties of MWCNT such as structure and availability surface were improved due to convert tubes into sheets that cause significantly increase in xylene adsorption. The equilibrium amount (qe (mg/g)) in nano material's dose of 1g/l, xylene concentration of 10mg/l, contact time of 10min, and pH 7, for SCNT (qe 9.8 mg/g) was higher than single wall carbon nano tubes (SWCNT) (qe 9.2 mg/g) and MWCNT (qe 8.9 mg/g). It is concluded that sheeted carbon nanotube due to their large surface area improve performance of xylene adsorption. Also carbon nano tube (CNT) recycling by heating, showed better adsorption performance for recycled SCNT. A comparison study on xylene adsorption revealed that sheeted carbon nanotube has better xylene adsorption performance as compared to CNT, carbon and silica adsorbents. This suggests that the SCNT is an efficient adsorbent for xylene removal in environmental pollutions cleanup. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3508

Pengembangan Pembelajaran Ips dengan Pendekatan Contextual Teaching And Learning (CTL) di SMPN 7 Purworejo

Tujuan Penelitian ini ada tiga. (1). Untuk mendeskripsikan pengembangan sumber belajar IPS dengan pendekatan CTL di SMPN 7 Purworejo. (2). Untuk mendeskripsikan pengembangan materi pembelajaran IPS dengan pendekatan CTL di SMPN 7 Purworejo. (3). Untuk mendeskripsikan pengembangan media pembelajaran IPS dengan pendekatan CTL di SMPN 7 Purworejo. Jenis Penelitian ini adalah kualitatif dengan desain etnografi. Subjek utama penelitian adalah guru, kepala sekolah dan siswa. Analisis data dilakukan dengan pengumpulan data, reduksi data, penyajian data, dan penarikan kesimpulan atau verifikasi. Uji keabsahan data menggunakan triangulasi. Ada tiga hal yang perlu disajikan sebagai hasil penelitian (1). Pengembangan sumber belajar IPS dengan pendekatan CTL di SMPN 7 Purworejo. Pembelajaran membantu guru mengaitkan isi pelajaran dengan situasi dunia nyata, materi pelajaran disampaikan berdasarkan standar isi, SK/KD, berdasarkan teori dan fakta-fakta, karakteristik sumber belajar (kongkrit, aktual, sistematis, mudah dipahami siswa, mudah didapat di lingkungan sekolah dan masyarakat), jenis sumber belajar berupa buku paket, lembar kerja siswa, gambar, peta, globe, internet, kriteria pemilihan sumber belajar mudah didapat/tersedia di sekolah dan masyarakat, mudah dipelajari siswa, mampu merealisasikan pencapaian tujuan pembelajaran, sesuai dengan SK/KD yang harus dikuasai siswa, guru menggunakan sumber belajar lingkungan masyarakat sekolah dan lingkungan tempat tinggal siswa, LK, mengakses data dari internet. (2). Pengembangan materi pembelajaran IPS dengan pendekatan CTL di SMPN 7 Purworejo meliputi materi dikembangkan dari materi yang sederhana dan mudah menuju materi yang sedang dan sukar, materi yang bersifat terbatas ke materi yang bersifat kompleks, kriteria materi yang diberikan sederhana dan menyeluruh (terpadu), riil, syarat life skill dan aktual, sumber materi pembelajaran berdasar kurikulum, buku paket, lingkungan, dan internet, pengembangan sumber belajar IPS dengan media dan metode. (3). Pengembangan media pembelajaran IPS dengan pendekatan CTL di SMPN 7 Purworejo. Upaya guru dalam mengembangkan media berupa membuat desain media, mengaplikasikan media, mengevaluasi dan merevisi media yang belum baik, pihak sekolah menyelenggarakan kegiatan pelatihan untuk mendukung kegiatan pengembangan media, jenis media yang dikembangkan oleh guru berupa simulasi, diskusi, proyek, peta konsep, guru melakukan analisis kebutuhan, biaya, keefektifan penggunaan dan ketepatan sesuai dengan SK/KD dan materi pembelajaran sebelum melakukan pengembangan media, hambatan pengembangan media (keterbatasan pengetahuan, pengalaman dan penguasaan IT)

REMOVAL OF Cr(VI) FROM SIMULATED ELECTROPLATING WASTEWATER BY MAGNETITE NANOPARTICLES

In this study, the efficiency of magnetic nanoparticles for removal of hexavalent chromium from simulated electroplating wastewater was evaluated. The nanoparticles were prepared using the sol-gel method and were characterized by X-ray diffraction (XRD), X-ray fluorescence (XRF), a scanning electron microscopy energy dispersive X-ray analyzer (SEM-Edx), a particle sizer and a vibrating sample magnetometer (VSM). The results showed that synthesized nanoparticles were in the size range of 40-300 rim, had purity of about 90 percent, and had magnetization of 36.5 electromagnetic unit per gram (emu/g). In conditions including pH 2, Cr (VI) concentration of 10 mg/L, nanomagnetite concentration of 1 g/L, a shaking speed of 250 rpm and a 20 minute retention time, 82% of Cr(VI) was removed. Competition from common coexisting ions such as Na(+), Ni(2+), Cu(2+), NO(3)(-), SO(4)(2-), and Cl was negligible. The adsorption data was well fitted by the Freundlich isotherm. It was concluded that magnetite nanoparticles have considerable potential for removal of Cr(VI) from electroplating wastewaters

Anterior thalamic nuclei lesions in rats disrupt markers of neural plasticity in distal limbic brain regions

AbstractIn two related experiments, neurotoxic lesions were placed in the anterior thalamic nuclei of adult rats. The rats were then trained on behavioral tasks, immediately followed by the immunohistochemical measurement of molecules linked to neural plasticity. These measurements were made in limbic sites including the retrosplenial cortex, the hippocampal formation, and parahippocampal areas. In Experiment 1, rats with unilateral anterior thalamic lesions explored either novel or familiar objects prior to analysis of the immediate-early gene zif268. The lesions reduced zif268 activity in the granular retrosplenial cortex and postsubiculum. Exploring novel objects resulted in local changes of hippocampal zif268, but this change was not moderated by anterior thalamic lesions. In Experiment 2, rats that had received either bilateral anterior thalamic lesions or control surgeries were exposed to novel room cues while running in the arms of a radial maze. In addition to zif268, measurements of c-AMP response element binding protein (CREB), phosphorylated CREB (pCREB), and growth associated protein43 (GAP-43) were made. As before, anterior thalamic lesions reduced zif268 in retrosplenial cortex and postsubiculum, but there were also reductions of pCREB in granular retrosplenial cortex. Again, the hippocampus did not show lesion-induced changes in zif268, but there were differential effects on CREB and pCREB consistent with reduced levels of hippocampal CREB phosphorylation following anterior thalamic damage. No changes in GAP-43 were detected. The results not only point to changes in several limbic sites (retrosplenial cortex and hippocampus) following anterior thalamic damage, but also indicate that these changes include decreased levels of pCREB. As pCREB is required for neuronal plasticity, partly because of its regulation of immediate early-gene expression, the present findings reinforce the concept of an ‘extended hippocampal system’ in which hippocampal function is dependent on distal sites such as the anterior thalamic nuclei

Evaluation of coronary arteries in non-ischemic cardiomyopathies: A case report

Arrhythmogenic right ventricular dysplasia/cardiomyopathy (ARVD/C) is a congenital cardiac disease with myocardial involvement, most probably right ventricular (RV) dysfunction, accounting for 20 of sudden cardiac deaths. Characterized by the fibro-fatty infiltration of the RV free wall, ARVD/C presents in adolescents with ventricular arrhythmias and heart failure symptoms and as biventricular failure in adults. The coronary risk in these patients is not clear. We present an incidental finding: the left anterior descending artery cut-off in a middle-aged man with ARVD/C. He had been under treatment for heart failure symptoms, which had decompensated frequently commencing 6 months earlier, and therefore he was scheduled for stem cell injection. He had no chest pain or coronary artery disease risk factors. Two-dimensional transthoracic echocardiography demonstrated RV enlargement with moderate to severe dysfunction and left ventricular ejection fraction (LVEF) of 35-40, which was 45-50 two years before. Selective coronary angiography performed 8 years previously was normal but a new one revealed the cut-off of the left anterior descending artery at the proximal portion, for which percutaneous coronary intervention was performed and showed no significant lesion in the other vessels. One should consider coronary artery disease in uncontrolled heart failure with LVEF reduction, even in the absence of typical chest pain. It may not be the natural course of the underlying disease. © 2016, Tehran Heart Center. All rights reserved