22,421 research outputs found

    Probe Branes Thermalization in External Electric and Magnetic Fields

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    We study thermalization on rotating probe branes in AdS_5 x S^5 background in the presence of constant external electric and magnetic fields. In the AdS/CFT framework this corresponds to thermalization in the flavour sector in field theory. The horizon appears on the worldvolume of the probe brane due to its rotation in one of the sphere directions. For both electric and magnetic fields the behaviour of the temperature is independent of the probe brane dimension. We also study the open string metric and the fluctuations of the probe brane in such a set-up. We show that the temperatures obtained from open string metric and observed by the fluctuations are larger than the one calculated from the induced metric.Comment: 27 pages, 7 figure

    Indoor mould growth prediction using coupled computational fluid dynamics and mould growth model

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    This study investigates, using in-situ and numerical simulation experiments, airflow and hygrothermal distribution in a mechanically ventilated academic research facility with known cases of microbial proliferations. Microclimate parameters were obtained from in-situ experiments and used as boundary conditions and validation of the numerical experiments with a commercial computational fluid dynamics (CFD) analysis tool using the standard k–ε model. Good agreements were obtained with less than 10% deviations between the measured and simulated results. Subsequent upon successful validation, the model was used to investigate hygrothermal and airflow profile within the shelves holding stored components in the facility. The predicted in-shelf hygrothermal profile was superimposed on mould growth limiting curve earlier documented in the literature. Results revealed the growth of xerophilic species in most parts of the shelves. The mould growth prediction was found in correlation with the microbial investigation in the case-studied room reported by the authors elsewhere. Satisfactory prediction of mould growth in the room successfully proved that the CFD simulation can be used to investigate the conditions that lead to microbial growth in the indoor environment

    Aviation Law Comes Home to the Main Street Lawyer

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    Well controlled in length and highly aligned ZnO nanorods were grown on the gold-coated glass substrate by hydrothermal growth method. ZnO nanorods were functionalised with selective thallium (I) ion ionophore dibenzyldiaza-18-crown-6 (DBzDA18C6). The thallium ion sensor showed wide linear potentiometric response to thallium (I) ion concentrations ( M to  M) with high sensitivity of 36.87 ± 1.49 mV/decade. Moreover, thallium (I) ion demonstrated fast response time of less than 5 s, high selectivity, reproducibility, storage stability, and negligible response to common interferents. The proposed thallium (I) ion-sensor electrode was also used as an indicator electrode in the potentiometric titration, and it has shown good stoichiometric response for the determination of thallium (I) ion

    Masjid sebagai Pusat Pembinaan Umat

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    Bila kita merujuk kepada perjalanan sejarah ketika Nabi Muhammad SAW akan membangun sebuah masyarakat, maka yang diutamakan adalah membangun masjid. Ini pula yang terjadi saat akan membangun kota Madinah dengan terlebih dahulu membangun fondasi masyarakat melalui masjid. Dalam situasi apapun, masjid dapat dijadikan pusat kegiatan masyarakat untuk berusaha mewujudkan tatanan sosial yang lebih baik. Jika selama ini pusat pembinaan masyarakat masih terpusat ke lembaga-lembaga formal seperti sekolah dan madrasah, maka bagi masyarakat sekarang harus juga dikembangkan lembaga kemasjidan sebagai salah satu alternatif pembinaan umat dan bahkan bangsa secara keseluruhan. Apabila jumlah masjid yang ada di Indonesia benar-benar difungsikan sebagai tamir masjid dengan baik, maka dalam waktu yang tidak lama dapat mengeluarkan bangsa ini dari keterpurukan akibat krisis multidimensional yang sudah diderita beberapa tahun ini. Karena salah satu fungsi masjid adalah memberikan pembinaan dalam berbagai bidang kehidupan termasuk sosial ekonomi.Untuk itu diperlukan usaha pengembangan pola idarah (manajemen), imarah (pengelolaan program) dan riayah (pengelolaan fisik)

    The moderating role of corporate reputation and employee-company identification on the work-related outcomes of job insecurity resulting from workforce localization policies

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    Although previous studies have examined the impact of job insecurity, there remains a need to understand specific issues related to job insecurity that results from government workforce localization policies. This study addresses this gap by examining employees' work-related outcomes: employee engagement, job burnout, and intentions to quit, recognizing the interplay of employees' identification with an organization and perceived corporate reputation in the context of Saudi Arabia's localization policies. The study uses social identification theory to explain how employees' perception of corporate reputation and their identification with a company shape their work attitudes in the presence of job-insecurity. Partial least square - path modeling (PLS-PM) and PROCESS tool is used to test hypotheses from data collected from 135 expatriate migrant employees working in different organizations in Saudi Arabia. Findings show that job insecurity has a significant effect of reducing the engagement of immigrant employees and leads to increased employee burnout and intentions to quit jobs. The results of moderation analysis show that favorable corporate reputation reduces the negative impact of job insecurity on employee's burnout and intentions to quit, whereas high level of identification with company may also reduce employee burnout, even during job insecurity. Although immigrant employees do not seek to leave a reputable organization due to localization policies, they still experience stress, become disengaged, and so are less productive. As a result, businesses should leverage their reputation towards governmental policies of localization, by advocating expatriate employees' contributions towards organizations and economy
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