25 research outputs found

    Brain-based classification of youth with anxiety disorders: transdiagnostic examinations within the ENIGMA-Anxiety database using machine learning

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    Neuroanatomical findings on youth anxiety disorders are notoriously difficult to replicate, small in effect size and have limited clinical relevance. These concerns have prompted a paradigm shift toward highly powered (that is, big data) individual-level inferences, which are data driven, transdiagnostic and neurobiologically informed. Here we built and validated supervised neuroanatomical machine learning models for individual-level inferences, using a case–control design and the largest known neuroimaging database on youth anxiety disorders: the ENIGMA-Anxiety Consortium (N = 3,343; age = 10–25 years; global sites = 32). Modest, yet robust, brain-based classifications were achieved for specific anxiety disorders (panic disorder), but also transdiagnostically for all anxiety disorders when patients were subgrouped according to their sex, medication status and symptom severity (area under the receiver operating characteristic curve, 0.59–0.63). Classifications were driven by neuroanatomical features (cortical thickness, cortical surface area and subcortical volumes) in fronto-striato-limbic and temporoparietal regions. This benchmark study within a large, heterogeneous and multisite sample of youth with anxiety disorders reveals that only modest classification performances can be realistically achieved with machine learning using neuroanatomical data.NWORubicon 019.201SG.022Advanced Behavioural Research MethodsHealth and Well-bein

    Influence of Conversion and Anastomotic Leakage on Survival in Rectal Cancer Surgery; Retrospective Cross-sectional Study

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    Pelayaran dan pengaruh kebudayaan Makassar Bugis di Pantai Utara Australiia

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    Peta Asia Tenggara yang dibuat orang Bugis sekitar tahun 1828 memberi kesan betapa luasnya wilayah pelayaran orang-orang Bugis dan Makassar pada waktu itu hingga ke wilayah Australia Utara dan bertemu dengan Merege ( nama penduduk asli Australia Utara). Buku ini merupakan penerbitan ulang terjemahan karangan Belanda hasil kerjasama LIPI dengan KITLV yang diterbitkan oleh Penerbit Bhratara pada 1970-an. Penerbitan ulang ini dilakukan perubahan penulisan sesuai EYD dan tata tulis yang berlaku. Buku ini merupakan terjemahan studi Prof. A.A. Cendse dan Dr. H.J. Heeeren. Hubungan antara Sulawesi Selatan dan tanah Marege di Australia Utara inilah yang menjadi pokok pembicaraan dari kedua karangan yang sekarang diterbitkan dalam satu judul buku ini

    Pelajaran dan pengaruh kebudayaan Makasar-Bugis di Pantai utara Australia

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    50 p.; 20 cm

    Isu linguistik Pengajaran Bahasa dan Sastra

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    Transmigrasi di Indonesia/ Heeren

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    xv, 208 hal.: bibl.: ill.: ind.; 21 cm

    Sputtering in surface conversion negative ion sources

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    In negative ion surface conversion sources with barium converters sputtering of hydrogenous surface particles is believed to be the dominant negative ion production mechanism. In the work performed at the FOM-Institute ion sputtering is also used as cleaning and diagnostic tool. This paper will review the work related to the sputtering mechanisms applied in the FOM surface conversion experiment over the last years. It will be shown that not only sputtering but also direct reflection and prompt rebound sputtering contribute to the negative ion formation on a barium surface
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