3,396 research outputs found

    Quantifying the search for solid Li-ion electrolyte materials by anion: a data-driven perspective

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    We compile data and machine learned models of solid Li-ion electrolyte performance to assess the state of materials discovery efforts and build new insights for future efforts. Candidate electrolyte materials must satisfy several requirements, chief among them fast ionic conductivity and robust electrochemical stability. Considering these two requirements, we find new evidence to suggest that optimization of the sulfides for fast ionic conductivity and wide electrochemical stability may be more likely than optimization of the oxides, and that the oft-overlooked chlorides and bromides may be particularly promising families for Li-ion electrolytes. We also find that the nitrides and phosphides appear to be the most promising material families for electrolytes stable against Li-metal anodes. Furthermore, the spread of the existing data in performance space suggests that fast conducting materials that are stable against both Li metal and a >4V cathode are exceedingly rare, and that a multiple-electrolyte architecture is a more likely path to successfully realizing a solid-state Li metal battery by approximately an order of magnitude or more. Our model is validated by its reproduction of well-known trends that have emerged from the limited existing data in recent years, namely that the electronegativity of the lattice anion correlates with ionic conductivity and electrochemical stability. In this work, we leverage the existing data to make solid electrolyte performance trends quantitative for the first time, building a roadmap to complement material discovery efforts around desired material performance.Comment: Main text is 41 pages with 3 figures and 2 tables; attached supplemental information is 8 pages with 3 figure

    Brecht e o Brasil: afinidades eletivas

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    This article discusses some aspects of Brecht's work and its relationship with the Brazilian literary, historical and socio-political life. The focus is on the inconsistency of the struggle for the so-called Bildung, where the advances of new ideas and social forms are in conflict with a reactionary context.Dieser Aufsatz behandelt einige Aspekte des Werkes Brechts und seine Beziehungen zum literarischen, historischen und sozio-politischen Leben in Brasilien. Im Zentrum des Interesses steht die Inkonsistenz des Strebens nach der sogenannten Bildung, wo die Entwicklung neuer Ideen und Sozialformen in Konflikt mit einem reaktionären Kontext steht

    Peliosis hepatis. Personal experience and literature review

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    Peliosis hepatis (PH) is a disease characterized by multiple and small, blood-filled cysts within the parenchymatous organs. PH is a very rare disease, more common in adults, and when it affects the liver, it comes to the surgeon’s attention only in an extremely urgent situation after the lesion’s rupture with the resulting hemoperitoneum. This report describes the case of a 29-year-old woman affected by recurring abdominal pain. CT scans showed a hepatic lesion formed by multiple hypodense areas, which showed an early acquisition of the contrast during the arterial phase. Furthermore, it remained isodense with the remaining parenchyma during the late venous phase. We decided on performing a liver resection of segment Ⅶ while avoiding a biopsy for safety reasons. The histopathologic examination confirmed the diagnosis of focal PH. PH should always be considered in the differential diagnosis of hepatic lesions. Clinicians should discuss the possible causes and issues related to the differential diagnosis in addition to the appropriate therapeutic approach. The fortuitous finding of a lesion, potentially compatible with PH, requires elective surgery with diagnostic and therapeutic intents. The main aim is to prevent the risk of a sudden bleeding that, in absence of properly equipped structures, may have a fatal outcome

    Tunable and Growing Network Generation Model with Community Structures

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    Recent years have seen a growing interest in the modeling and simulation of social networks to understand several social phenomena. Two important classes of networks, small world and scale free networks have gained a lot of research interest. Another important characteristic of social networks is the presence of community structures. Many social processes such as information diffusion and disease epidemics depend on the presence of community structures making it an important property for network generation models to be incorporated. In this paper, we present a tunable and growing network generation model with small world and scale free properties as well as the presence of community structures. The major contribution of this model is that the communities thus created satisfy three important structural properties: connectivity within each community follows power-law, communities have high clustering coefficient and hierarchical community structures are present in the networks generated using the proposed model. Furthermore, the model is highly robust and capable of producing networks with a number of different topological characteristics varying clustering coefficient and inter-cluster edges. Our simulation results show that the model produces small world and scale free networks along with the presence of communities depicting real world societies and social networks.Comment: Social Computing and Its Applications, SCA 13, Karlsruhe : Germany (2013

    STUDIO NUMERICO DELL'EMODINAMICA IN PAZIENTI CON DISSECAZIONE AORTICA DI TIPO B

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    The development of type B aortic dissection (AoD) is caused by altered haemodynamic forces exerted on false and true lumina of dissected aorta. This work aims to study haemodynamic and morphological proprieties, which influence the progression or stability of type B AoD. Computational fluid-dynamic analyses were performed on three patients with type B AoD, whose two presented an aneurysm evolution and one presented no further complication connected with dissection. Blood flow features showed that the true lumen flow was laminar and uniform while false lumen flow lost the laminar characteristic with consequent vorticity formation. The entry point zone proximal to the aortic arch showed both high blood velocity and pressure connected with peaks of maximum WSS value. A negative pressure gradient between the false lumen entry and re-entry points was observed. This promotes the blood to flow towards the abdominal aorta reducing the risk of retrograde flow during systole. We concluded that fluid dynamics study of patients with type B AoD is a valid tool to identify the risk of aortic dissection progression as well as the formation of aortic dissection connected pathology

    Tanggap Pertumbuhan Dan Hasil Tanaman Jagung Manis (Zea Mays L. Saccharata) Pada Aplikasi Berbagai Pupuk Organik

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    The research was conducted in the Green house the Faculty of Agriculture, University of Tadulako Palu. Time of the study began in May 2014. This study used completely randomized design with 5 treatments namely A : Without Fertilizer (control), B : Manure Fertilizer (20 ton ha-1), C : Bokasi Fertilizer (20 ton ha-1), D : Biofertilizer (33,3 ton ha-1), and E : Inorganic Fertilizer (NPK 350 kg ha-1). Each treatment was repeated 4 times resulted to 20 experimental units. Treatment which shows significancy will be further tested with honestly significant difference (HSD) at level of 5%. The results showed that the growth and yield of corn treated with various organic fertilizers positively impacted on plant height, number of leaves, flowering time, cob weight (with husk and without husk) and cob length (with husk and without husk). The application of biofertilizers (microbial from bamboo grove) resulted to better growth and yield

    Peta mutu pendidikan jenjang SMP Kabupaten Badung : diolah dan dianalisis berdasarkan data rapor mutu tahun 2018

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    Analisis ini akan menghasilkan peta mutu dan berbagai rekomendasi yang akurat dan bermanfaat bagi pemerintah kota/kabupaten/ provinsi untuk dasar perencanaan program peningkatan mutu pendidikan di tingkat kota/kabupaten/ provinsi yang perlu dilaksanakan pada tahuntahun berikutnya. Agregasi data pemetaan mutu pendidikan adalah serangkaian strategi yang dilaksanakan oleh tim penjaminan mutu pendidikan daerah/pengawas sekolah tingkat Pemerintah Daerah untuk memonitor dan mengevaluasi mutu dan keefektifan sekolah dan tenaga kependidikan berdasarkan SNP. Hasil agregasi ini menjadi suatu kewajiban bagi pemerintah kabupaten/kota/ provinsi sesuai kewenangannya untuk dapat dipahami dan dilaksanakan secara terus menerus dan berkelanjutan sehingga menjadi suatu budaya mutu di tingkat kabupaten/kota, provinsi maupun tingkat pusat. Hal ini sesuai dengan peran Pemerintah Daerah baik Kabupaten maupun Kota dan Provinsi dalam Sistem Pendidikan Nasional, dalam hal: (1) menyediakan pelayanan pendidikan; (2) memonitor mutu pendidikan dan pelayanan pendukung pendidikan; (3) membuat laporan mengenai mutu dan kinerja sekolah; dan (4) meningkatkan mutu dan pelayanan pendidikan. Peta mutu pendidikan ini memaparkan peta capaian mutu SNP Kabupaten Badung untuk setiap jenjang pendidikan. Peta capaian mutu SNP dibuat sebagai perwujudan tugas dan wewenang LPMP Bali dalam memetakan mutu pendidikan dan pelaksanaan SPMI-Dikdasmen berdasarkan data dan informasi dalam sistem informasi mutu pendidikan di tingkat Kabupaten Badung

    An association of boswellia, betaine and myo-inositol (Eumastós) in the treatment of mammographic breast density. A randomized, double-blind study

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    Mammographic breast density is a recognized risk factor for breast cancer. The causes that lead to the proliferation of the glandular breast tissue and, therefore, to an increase of breast density are still unclear. However, a treatment strategy to reduce the mammary density may bring about very relevant clinical outcomes in breast cancer prevention. Myo-inositol is a six-fold alcohol of cyclohexane, has already been proved to modulate different pathways: inflammatory, metabolic, oxidative and endocrine processes, in a wide array of human diseases, including cancer and the genesis of mammary gland and breast diseases, like fibrosis, as well as metabolic and endocrine cues. Similarly, boswellic acid and betaine (three-methyl glycine) both inhibit inflammation and exert protective effects on breast physiology. Based on this scientific background, we hypothesized that a combination including, boswellic acid, betaine and myo-inositol would be able to reduce breast density working on different pathways.OBJECTIVE: Mammographic breast density is a recognized risk factor for breast cancer. The causes that lead to the proliferation of the glandular breast tissue and, therefore, to an increase of breast density are still unclear. However, a treatment strategy to reduce the mammary density may bring about very relevant clinical outcomes in breast cancer prevention. Myo-inositol is a six-fold alcohol of cyclohexane, has already been proved to modulate different pathways: inflammatory, metabolic, oxidative and endocrine processes, in a wide array of human diseases, including cancer and the genesis of mammary gland and breast diseases, like fibrosis, as well as metabolic and endocrine cues. Similarly, boswellic acid and betaine (threemethyl glycine) both inhibit inflammation and exert protective effects on breast physiology. Based on this scientific background, we hypothesized that a combinat ion including, boswellic acid, betaine and myo-inositol would be able to reduce breast density working on different pathways. PATIENTS AND METHODS: In this study, seventy-six premenopausal women were randomly assigned to the placebo and the experimental drug arms (Eumastós®) for six months. RESULTS: After 6 months of treatment, statistically significant difference between the two groups was recorded on the breast density reduction (60% vs. 9%), using mammographic as well as ultrasound examination. CONCLUSIONS: Preliminary data collected here with support the starting assumptions,that the association comprising boswellic acid, betaine and myo-inositol significantly reduces mammary density, providing the first evidence for a new and safe approach for the management of mammographic density treatment

    Un nuovo caso di spontaneizzazione incipiente: Lagunaria patersonia (Andrews) G. Don (Malvaceae) in Sicilia

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    In questa nota si riporta l’incipiente processo di naturalizzazione in Sicilia di Lagunaria patersonia (Andrews) G. Don, un albero australiano sempreverde di media grandezza appartenente alla famiglia delle Malvaceae
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