Dedicated front-end and readout electronics developments for real time 3D directional detection of dark matter with MIMAC

A complete dedicated electronics, from front-end to back-end, was developed to instrument a MIMAC prototype. A front end ASIC able to monitor 64 strips of pixels and to provide their individual "Time Over Threshold" information has been designed. An associated acquisition electronics and a real time track reconstruction software have been developed to monitor a 512 channel prototype. This auto-triggered electronic uses embedded processing to reduce the data transfer to its useful part only, i.e. decoded coordinates of hit tracks and corresponding energy measurements. The electronic designs, acquisition software and the results obtained are presented.Comment: Proceedings of the 3rd International conference on Directional Detection of Dark Matter (CYGNUS 2011), Aussois, France, 8-10 June 201

Micromegas detector developments for MIMAC

The aim of the MIMAC project is to detect non-baryonic Dark Matter with a directional TPC. The recent Micromegas efforts towards building a large size detector will be described, in particular the characterization measurements of a prototype detector of 10 $\times$ 10 cm$^2$ with a 2 dimensional readout plane. Track reconstruction with alpha particles will be shown.Comment: 8 pages, 7 figures Proceedings of the 3rd International conference on Directional Detection of Dark Matter (CYGNUS 2011), Aussois, France, 8-10 June 2011; corrections on author affiliation

Background Rejection in the DMTPC Dark Matter Search Using Charge Signals

The Dark Matter Time Projection Chamber (DMTPC) collaboration is developing low-pressure gas TPC detectors for measuring WIMP-nucleon interactions. Optical readout with CCD cameras allows for the detection for the daily modulation in the direction of the dark matter wind, while several charge readout channels allow for the measurement of additional recoil properties. In this article, we show that the addition of the charge readout analysis to the CCD allows us too obtain a statistics-limited 90% C.L. upper limit on the $e^-$ rejection factor of $5.6\times10^{-6}$ for recoils with energies between 40 and 200 keV$_{\mathrm{ee}}$. In addition, requiring coincidence between charge signals and light in the CCD reduces CCD-specific backgrounds by more than two orders of magnitude.Comment: 8 pages, 6 figures. For proceedings of DPF 2011 conferenc

Data acquisition electronics and reconstruction software for real time 3D track reconstruction within the MIMAC project

Directional detection of non-baryonic Dark Matter requires 3D reconstruction of low energy nuclear recoils tracks. A gaseous micro-TPC matrix, filled with either 3He, CF4 or C4H10 has been developed within the MIMAC project. A dedicated acquisition electronics and a real time track reconstruction software have been developed to monitor a 512 channel prototype. This autotriggered electronic uses embedded processing to reduce the data transfer to its useful part only, i.e. decoded coordinates of hit tracks and corresponding energy measurements. An acquisition software with on-line monitoring and 3D track reconstruction is also presented.Comment: Proceedings of TWEPP-11, Vienna, Austria, 26-30 September 201

PENINGKATAN PRESTASI BELAJAR MATA PELAJARAN AKUNTANSI DENGAN METODE PEMBELAJARAN KOOPERATIF TIPE TEAM GAME TOURNAMENT (TGT) PADA SISWA KELAS XI SMA NEGERI 1 KARTASURA TAHUN AJARAN 2009/2010 (Penelitian Tindakan Kelas)

Tujuan Penelitian ini adalah untuk meningkatkan prestasi belajar mata pelajaran akuntansi dengan metode pembelajaran kooperatif tipe Team Game Tournament (TGT) pada siswa kelas XI SMA Negeri 1 Kartasura tahun ajaran 2009/2010. Penelitian ini menggunakan metode Penelitian Tindakan Kelas (PTK). Obyek penelitian adalah siswa kelas XI IPS 4 SMA Negeri 1 Kartasura yang berjumlah 46 siswa. Penelitian ini dilaksanakan dengan kolaborasi antara guru kelas, peneliti, dan melibatkan siswa. Teknik pengumpulan data yang dilakukan dengan observasi, wawancara, angket, tes dan dokumentasi. Prosedur penelitian meliputi 6 tahap, yaitu: (1) identifikasi masalah, (2) persiapan tindakan, (3) penyusunan rencana tindakan, (4) implementasi tindakan, (5) pengamatan, dan (6) penyusunan laporan. Proses penelitian ini dilaksanakan dalam dua siklus, masing-masing siklus terdiri dari empat tahap, yaitu: (1) perencanaan tindakan, (2) pelaksanaan tindakan, (3) observasi dan interprestasi, dan (4) analisis dan refleksi. Setiap siklus dilaksanakan dalam tiga kali pertemuan, selama 6 x 45 menit. Berdasarkan hasil penelitian dapat disimpulkan bahwa terdapat peningkatan prestasi balajar mata pelajaran akuntansi dengan metode pembelajaran kooperatif tipe Team Game Tournament (TGT) pada siswa kelas XI SMA Negeri 1 Kartasura tahun ajaran 2009/2010. Hal tersebut terefleksi dari beberapa indikator sebagai berikut: (1) Motivasi berprestasi siswa meningkat sebesar 5,43% dari 79,70% pada siklus pertama menjadi 85,13% pada siklus kedua, (2) Siswa semakin antusias, berpartisispasi dalam pembelajaran dan bersemangat pada saat pemberian apersepsi, penjelasan materi dan diskusi kelompok sebesar 68,93% pada siklus pertama menjadi 78% pada siklus kedua, (3) Siswa semakin antusias, berpartisispasi dalam pembelajaran dan bersemangat pada saat pelaksanaan turnamen sebesar 66,67% pada siklus pertama menjadi 71,43% pada siklus kedua, (4) Siswa semakin antusias, berpartisispasi dalam pembelajaran dan bersemangat pada saat pelaksanaan evaluasi individu sebesar 69,22% pada siklus pertama menjadi 73,65% pada siklus kedua, (5) Adanya peningkatan prestasi belajar siswa sebesar 10,87%, dari 84,78% sebanyak 39 siswa pada siklus pertama meningkat menjadi 44 siswa sebesar 95,65% pada siklus kedua. Peningkatan tersebut terjadi setelah guru melakukan beberapa upaya, antara lain: (1) Guru sudah menerapkan metode Team Game Tournament (TGT) dan mengelola kelas dengan cukup baik, hal tersebut dapat dilihat dari: (a) kemampuan guru dalam meningkatkan motivasi berprestasi siswa melalui pembelajaran dengan metode Team Game Tournament (TGT), (b) kemampuan guru dalam memotivasi siswa untuk berpartisipasi aktif dalam proses pembelajaran yang berlangsung, (c) guru sudah dapat meningkatkan rasa tanggung jawab dan kompetisi dalam diri siswa, guna meningkatkan prestasi belajar siswa dalam kegiatan belajar mengajar melalui game tournament; (2) Guru menyadari perlunya melakukan suatu evaluasi terhadap proses pembelajaran, agar segala kelemahan yang ada dapat teratasi dengan baik dan tidak terulang dalam proses pembelajaran berikutnya

Restauration morpho-dynamique et redynamisation de la section court-circuitée du Rhin en aval du barrage de Kembs (projet INTERREG / EDF)

National audienceThe Upper Rhine River has been heavily impacted by channelization for flood protection and navigation, and then by damming for hydropower generation. In normal non flooding conditions, most of the flows are diverted in a canalized section whereas the regulated “old Rhine” bypassed reach runs a minimum flow. Between Huningue and Neuf-Brisach, engineering works induced simplification and stabilization of the channel pattern from a formerly braiding sector to a single incised channel, hydrological modifications, bottom armouring due to bedload decrease, and thus ecological alterations. Two complementary and interdisciplinary projects have been initiated to restore alluvial morphodynamics: i) the international “INTERREG IV - Redynamisation of the old Rhine” project (2009-2012) coordinated by the Alsace region, France; ii) the left bank “controlled erosion” project launched by Electricité de France (EDF) within Kembs hydroelectric station relicensing process since 2003-2004. The purpose of these projects is to evaluate the feasibility of an important hydro-morphological and ecological restoration plan on a 45 km long reach, through both field testing of bank erosion techniques at favourable locations, and artificial sediments input from right bank excavations. This will help define possible long term prospective scenarios, in order to restore sustainable sediment transport, morphodynamics variability and associated ecological functions. The study will involve historical analysis, hydro-morphological / hydraulic physical and numerical modelling, physical and ecological monitoring, and sociological aspectsLe Rhin alsacien-allemand a enregistré de profondes modifications morphologiques et hydrologiques à la suite de sa correction et de sa régularisation pour la protection contre les crues et la navigation, puis après la construction de barrages hydro-électriques. Les aménagements réalisés entre Huningue et Neuf-Brisach ont engendré une simplification et une stabilisation du style fluvial. Un fleuve en tresses a cédé la place à un chenal unique incisé. Le fond de chenal est devenu pavé à cause d’une diminution des apports de charge de fond et des altérations écologiques ont été observées (simplification des habitats aquatiques et riverains). Deux projets complémentaires et interdisciplinaires ont été engagés afin de restaurer une dynamique des formes alluviales : i) le projet international INTERREG IV – Redynamisation du Vieux Rhin (2009-2012) sous l’impulsion de la région Alsace ; ii) le projet d’érosion maitrisée des berges de la rive gauche conduit par Electricité de France (EDF) dans le cadre du renouvellement de la concession de l’aménagement de Kembs. L’objectif des deux projets est de définir un plan de restauration hydro-morphologique et écologique conduisant à la redynamisation d’un tronçon de 45 km. L’étude repose sur une analyse historique, l’exploitation de modèles à la fois physiques et numériques, et les suivis morphologiques in situ d’une recharge artificielle en sédiments et d’érosions de berge contrôlées. Ces études de faisabilité sont complétées par des analyses écologique et sociologique pour apprécier l’impact socio-environnemental de ces projets

Q methodology and rural research

Traditionally, rural scholarship has been limited in its methodological approach. This has begun to change in recent years as rural researchers have embraced a range of different methodological tools. The aim of this article is to contribute to greater methodological pluralism in rural sociology by introducing readers to a method of research that is rarely engaged in the field, that is, Q methodology. The article describes the defining features of the approach as well as providing examples of its application to argue that it is a method that offers particular opportunities and synergies for rural social science research

Readout technologies for directional WIMP Dark Matter detection

The measurement of the direction of WIMP-induced nuclear recoils is a compelling but technologically challenging strategy to provide an unambiguous signature of the detection of Galactic dark matter. Most directional detectors aim to reconstruct the dark-matter-induced nuclear recoil tracks, either in gas or solid targets. The main challenge with directional detection is the need for high spatial resolution over large volumes, which puts strong requirements on the readout technologies. In this paper we review the various detector readout technologies used by directional detectors. In particular, we summarize the challenges, advantages and drawbacks of each approach, and discuss future prospects for these technologies