The Implementation of Task-based Learning in Teaching Recount Text Writing for Junior High School Students

Penelitian ini menelaah cara guru dalam menerapkan pembelajaran berbasis tugas dalam pengajaran menulis melalui beberapa langkah dan menjelaskan bagaimana kemampuan siswa dalam menulis teks recount. Penelitian ini dilakukan dengan pendekatan kualitatif karena hasil data dianalisis dan dideskripsikan dalam bentuk kata- kata, kalimat, dan ujaran. Data diperoleh dari observasi, wawancara, dan tulisan siswa. Analisis data dilakukan melalui kategorisasi, displai data dan pengambilan kesimpulan. Subjek penelitian ini adalah seorang guru Bahasa Inggris dan tiga puluh siswa kelas 8. Hasil penelitian menunjukkan bahwa penerapan pembelajaran berbasis tugas memiliki banyak kelemahan dalam beberapa aspek, diantaranya adalah tidak lengkapnya langkah- langkah dalam pelaksanaan pada saat penerapan, kekurangan waktu pada saat mengerjakan tugas dan juga penggunaan bahasa ibu dan bukannya bahasa target oleh siswa yang membuat penerapan pembelajaran berbasis tugas tidak berhasil seperti yang diharapkan. Berdasarkan temuan tersebut, beberapa saran diajukan. Guru Bahasa Inggris seharusnya menggunakan dan mendesain tugas yang tidak memakan waktu lama dalam pengerjaannya, sehingga langkah- langkah dalam pembelajaran berbasis tugas ini dapat terlaksana dalam satu pertemuan. Para siswa harus berbicara menggunakan bahasa target ketika pembelajaran berbasis tugas ini diterapkan agar tujuan pendekatan ini dapat tercapai

Cooperative and Distributed Localization for Wireless Sensor Networks in Multipath Environments

We consider the problem of sensor localization in a wireless network in a multipath environment, where time and angle of arrival information are available at each sensor. We propose a distributed algorithm based on belief propagation, which allows sensors to cooperatively self-localize with respect to one single anchor in a multihop network. The algorithm has low overhead and is scalable. Simulations show that although the network is loopy, the proposed algorithm converges, and achieves good localization accuracy

Development of the human prepuce and its innervation.

Development of the human prepuce was studied over the course of 9-17 weeks of gestation in 30 specimens. Scanning electron microscopy revealed subtle surface features that were associated with preputial development, namely the appearance of epidermal aggregates that appeared to be associated with formation of the preputial fold. Transverse and sagittal sections revealed that the epidermis of the glans is considerably thicker than that of the penile shaft. We described a novel morphogenetic mechanism of formation of the preputial lamina, namely the splitting of the thick epidermis of the glans into the preputial lamina and the epidermis via the intrusion of mesenchyme containing red blood cells and CD31-positive blood vessels. This process begins at 10-11 weeks of gestation in the proximal aspect of the glans and extends distally. The process is likely to be androgen-dependent and mediated via androgen receptors strategically localized to the morphogenetic process, but signaling through estrogen receptor may play a role. Estrogen receptor alpha (ESR1) has a very limited expression in the developing human glans and prepuce, while estrogen receptor beta (ESR2) is expressed more broadly in the developing preputial lamina, epidermis and urethra. Examination of the ontogeny of innervation of the glans penis and prepuce reveals the presence of the dorsal nerve of the penis as early as 9 weeks of gestation. Nerve fibers enter the glans penis proximally and extend distally over several weeks to eventually reach the distal aspect of the glans and prepuce by 14-16 weeks of gestation