1,388 research outputs found

    Test for Spatio-Temporal Counts Being Poisson

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    The new Log-Linear Test (TL) is proposed to identify when the Poisson model fails for a collection of count random variables. TL is shown to have better rejection rate with small sample size and essentially the same power compared to a classical Fisher-Bohning’s Statistic TF for standard alternatives to Poisson

    Low Expression of DYRK2 (Dual Specificity Tyrosine Phosphorylation Regulated Kinase 2) Correlates with Poor Prognosis in Colorectal Cancer.

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    Dual-specificity tyrosine-phosphorylation-regulated kinase 2 (DYRK2) is a member of dual-specificity kinase family, which could phosphorylate both Ser/Thr and Tyr substrates. The role of DYRK2 in human cancer remains controversial. For example, overexpression of DYRK2 predicts a better survival in human non-small cell lung cancer. In contrast, amplification of DYRK2 gene occurs in esophageal/lung adenocarcinoma, implying the role of DYRK2 as a potential oncogene. However, its clinical role in colorectal cancer (CRC) has not been explored. In this study, we analyzed the expression of DYRK2 from Oncomine database and found that DYRK2 level is lower in primary or metastatic CRC compared to adjacent normal colon tissue or non-metastatic CRC, respectively, in 6 colorectal carcinoma data sets. The correlation between DYRK2 expression and clinical outcome in 181 CRC patients was also investigated by real-time PCR and IHC. DYRK2 expression was significantly down-regulated in colorectal cancer tissues compared with adjacent non-tumorous tissues. Functional studies confirmed that DYRK2 inhibited cell invasion and migration in both HCT116 and SW480 cells and functioned as a tumor suppressor in CRC cells. Furthermore, the lower DYRK2 levels were correlated with tumor sites (P = 0.023), advanced clinical stages (P = 0.006) and shorter survival in the advanced clinical stages. Univariate and multivariate analyses indicated that DYRK2 expression was an independent prognostic factor (P < 0.001). Taking all, we concluded that DYRK2 a novel prognostic biomarker of human colorectal cancer

    Modeling of the Electrical Characteristics of an Organic Field Effect Transistor in Presence of the Bending Effects

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    An analytical model incorporating the density of trap states for a bendable organic field effect transistor (OFET) is presented in this paper. The aim of this work is to propose a novel modeling framework to quantitatively characterize the bending effects on the electrical properties of an OFET in the linear and saturation regimes. In this model, the exponentially distributed shallow trap states are introduced into the Poisson equation to describe the carrier transports in the channel. The carrier mobility takes into account the low field mobility enhancement under gradual channel approximation and high field degradation. As a result, the generalized current-voltage transistor equations are derived for the first time to reflect the transconductance relationships of the OFET with trap states. In addition, an electro-mechanical coupling relationship is established per the metaphorical analogy between inorganic and organic semiconductor energy band models to quantify the stress-induced variations of the carrier mobility, and the threshold voltage. It is revealed that the before- and after-bending transconductances, predicted from the derived analytical model, are in good agreement with the experimental data measured from DNTT-based OFET bending tests

    A Comparison of the Origin of Idioms in Mandarin and Indonesian

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    In language, idioms can function as stand-alone semantic units because they contain whole concepts. These concepts, formed from human thought, can be explored to discover cultural elements which served as the basis for idiom creation. If the origins of an idiom are known or recognized, that idiom\u27s meaning can be understood more easily. Idioms are frequently used by language communities in their day-to-day lives. However, the origins of idioms in the Indonesian language has almost never been discussed or researched. This article compares the origins of idioms in Mandarin and in Indonesian. It finds that the origins of idioms in Mandarin and in Indonesian are diverse, but in general fit one of two main types: they may be adapted from foreign languages (most importantly in idioms related to religion), or be created within the society and reproduced from generation to generation. Idioms can be traced to either the written tradition or the oral tradition. Idioms in Mandarin generally originate from the written tradition, whereas idioms in Indonesian tend to originate from orality. This study uses the theory of meaning formation first proposed by Ogden and Richards (1911). The comparative method of data analysis is used here, as the origins of idioms in Mandarin and Indonesian are compared

    Cellular and humoral immunity protect against vaginal Zika virus infection in mice

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    ABSTRACT Zika virus (ZIKV), which can cause devastating disease in fetuses of infected pregnant women, can be transmitted by mosquito inoculation and sexual routes. Little is known about immune protection against sexually transmitted ZIKV. In this study, we show that previous infection through intravaginal or subcutaneous routes with a contemporary Brazilian strain of ZIKV can protect against subsequent intravaginal challenge with a homologous strain. Both routes of inoculation induced high titers of ZIKV-specific and neutralizing antibody in serum and the vaginal lumen. Virus-specific T cells were recruited to and retained in the female reproductive tract after intravaginal and subcutaneous ZIKV infection. Studies in mice with genetic or acquired deficiencies in B and/or T cells demonstrated that both lymphocyte populations redundantly protect against intravaginal challenge in ZIKV-immune animals. Passive transfer of ZIKV-immune IgG or T cells significantly limited intravaginal infection of naive mice, although antibody more effectively prevented dissemination throughout the reproductive tract. Collectively, our experiments begin to establish the immune correlates of protection against intravaginal ZIKV infection, which should inform vaccination strategies in nonpregnant and pregnant women. IMPORTANCE The recent ZIKV epidemic resulted in devastating outcomes in fetuses and may affect reproductive health. Unlike other flaviviruses, ZIKV can be spread by sexual contact as well as a mosquito vector. While previous studies have identified correlates of protection for mosquito-mediated infection, few have focused on immunity against sexual transmission. As exposure to ZIKV via mosquito bite has likely occurred to many living in areas where ZIKV is endemic, our study addresses whether this route of infection can protect against subsequent sexual exposure. We demonstrate that subcutaneous ZIKV infection can protect against subsequent vaginal infection by generating both local antiviral T cell and antibody responses. Our research begins to define the immune correlates of protection for ZIKV infection in the vagina and provides a foundation for testing ZIKV vaccines against sexual transmission. </jats:p

    Novel Directions In Therapy Against Age-Related Vascular Disease

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    __Abstract__ Genomic instability is recognized as one of the primary mechanisms that lead to organismal aging, and leads to progeria when developing in an accelerated pace due to defective genomic maintenance systems, such as nucleotide excision repair, in humans and mouse models of progeroid syndromes. The role of genomic instability related to nuclear DNA is currently under investigation with respect to its role in cardiovascular disease, in particular in relation to vascular aging. In this review we highlight the first findings in this field of research that come from experiment in nucleotide excision repair-defective mouse models and from genetic studies. Possible mechanisms that mediate the consequences of genomic instability at the local, vascular and at the systemic level, such as cell senescence, mutations, mitochondrial damage, and sirtuin 1 and IGF-1 decrease, are discussed and important goals for future research are set

    A gorilla adenovirus-based vaccine against Zika virus induces durable immunity and confers protection in pregnancy

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    The teratogenic potential of Zika virus (ZIKV) has made the development of an effective vaccine a global health priority. Here, we generate two gorilla adenovirus-based ZIKV vaccines that encode for pre-membrane (prM) and envelope (E) proteins (GAd-Zvp) or prM and the ectodomain of E protein (GAd-Eecto). Both vaccines induce humoral and cell-mediated immune responses and prevent lethality after ZIKV challenge in mice. Protection is antibody dependent, CD

    Explaining the variety in smart eco city development in China-What policy network theory can teach us about overcoming barriers in implementation?

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    The Pearl River Delta (PRD) is one of the largest and fastest growing urbanized deltas in China and the world. Its municipalities hope to attract investors, firms, high-quality labour force and residents in line with ecological modernization. They do so by using a variety of attractive city labels, such as eco city, low carbon city, and smart city. The physical shape th

    The multi-level governance of formulating regional brand identities: Evidence from three Mega City Regions in China

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    The emergence and expansion of clusters of large metropolitan areas also known as Mega City Regions (MCRs) is a worldwide phenomenon. In China, governmental attempts are made to develop so-called regional brand identities for them. Regional brand identities, as a subspecies of place brand identities, differ from regional identities in the sense that they are the result of conscious branding efforts on the part of public authorities rather than more historically evolved regional identities as experienced by citizens. In this study, the establishment of regional brand identities for three MCRs in China is examined, as these are constituted through and institutionally embedded in intergovernmental relations. We map the perceptions of national, provincial and municipal governments of regional brand identities based on planning documents and relevant interviews. The emergence and stabilization of the regional profiles for China's largest MCRs Pearl River Delta (PRD), Yangtze River Delta (YRD) and Jing-Jin-Ji (JJJ) are featured in their dynamic territorial boundaries, centralized institutionalization and various symbolic meanings. The national government promotes the regional brands to reinforce the strategic awareness and future direction of the region, and these profiles are diffused at the provincial and municipal level
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