13,810 research outputs found

    Hawking radiation from dynamical horizons

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    In completely local settings, we establish that a dynamically evolving black hole horizon can be assigned a Hawking temperature. Moreover, we calculate the Hawking flux and show that the radius of the horizon shrinks.Comment: 5 Page

    New Records of Thecacineta cothurnioides and Trematosoma rotunda (Ciliophora, Suctorea) as epibionts on nematodes from the Indian Ocean

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    This article deals with the report of two suctorian ciliates species viz. Thecacineta cothurnioides Collin, 1909 and Trematosoma rotunda (Allgén, 1952 ) as epibionts on Tricoma sp. and Pseudochromadora sp. (Nematoda) respectively from Ratnagiri, west coast of India, Arabian Sea (Indian Ocean). Redescription of two species with distribution and nomenclatural notes are given. Both species are recorded here first time from Indian coast and the Indian Ocean. Genus Tricoma Cobb, 1894 is also recorded here first time as a host of Th. cothurnioides

    An overview of Suctorian ciliates (Ciliophora, Suctorea) as epibionts of halacarid mites (Acari, Halacaridae)

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    Scant information is available regarding the prevalence and distribution of suctorian ciliates on halacarid mites. However, using this limited information and data from our laboratory on the systematics, biology, ecology and distribution of suctorian ciliates that are epibionts of halacarid mites, we redescribed four suctorian species: Limnoricus ceter (Jankowski), Praethecacineta halacari (Schulz), Thecacineta calix (Schroder) and Acineta sulcata Dons. We also recognized Lissacineta allgeni Jankowski and Thecacineta allgeni (Jankowski) as synonyms of Praethecacineta halacari (Schluz), and Thecacineta laophontis Jankowski and Paracineta moebiusi Kahl as synonyms of Thecacineta calix (Schroder). Many suctorians have been reported, but not properly identified in the halacarid literature. So, we have attempted to identify those suctorians to species level. Lastly, the interactions between the suctorians and their hosts are also discussed and Praethecacineta halacari is also reported for the first time from the Indian coast

    Report of epibiont Thecacineta calix (Ciliophora: Suctorea) on deep sea Desmodora (Nematoda) from the Andaman Sea, Indian Ocean

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    Suctorian epibionts Thecacineta calix attached on the cuticle of nematodes Desmodora sphaerica and D. pontica are reported here from the deep sea hexactinellid sponge Pheronema sp. from the Andaman Sea (Indian Ocean). The epibiont T. calix is reported here for first time from the Andaman Sea

    USING TRANSFORMATIVE LEARNING THEORY TO EXPLORE ADJUNCT FACULTY\u27S EXPERIENCES WITH TEACHING INFORMATION LITERACY: A CASE STUDY OF COMMUNITY COLLEGES IN NEW JERSEY

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    The purpose of this qualitative case study was to explore how adjunct faculty experienced transformative learning as a result of their efforts to teach information literacy for their classes at community colleges in New Jersey. Information literacy was defined as the ability to identify information needs and the skills to discover, evaluate, and use information effectively (Townsend et. al., 2016). The study resulted in descriptions of how adjunct faculty transformed their teaching practices when necessary to adapt to new information environments. A qualitative descriptive case study methodology was chosen to examine the occurrence of this phenomenon (Yin, 2014). For the purposes of this research, the units of analysis were adjunct faculty, who have taught at community colleges in New Jersey for at least two semesters. The setting for the study was the network of the 18 community colleges in New Jersey with more than 60 campuses, serving 21 counties (NJCCC, 2019)

    Accelerating Universe as Window for Extra Dimensions

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    Homogeneous cosmological solutions are obtained in five dimensional space time assuming equations of state p=kρ p = k\rho and p5=ÎłÏ p_{5}= \gamma\rho where p is the isotropic 3 - pressure and p5p_{5}, that for the fifth dimension. Using different values for the constants k and Îł\gamma many known solutions are rediscovered. Further the current acceleration of the universe has led us to investigate higher dimensional gravity theory, which is able to explain acceleration from a theoretical view point without the need of introducing dark energy by hand. We argue that the terms containing higher dimensional metric coefficients produce an extra negative pressure that apparently drives an acceleration of the 3D space, tempting us to suggest that the accelerating universe seems to act as a window to the existence of extra spatial dimensions. Interestingly the 5D matter field remains regular while the \emph{effective} negative pressure is responsible for the inflation. Relaxing the assumptions of two equations of state we also present a class of solutions which provide early deceleration followed by a late acceleration in a unified manner. Interesting to point out that in this case our cosmology apparently mimics the well known quintessence scenario fuelled by a generalised Chaplygin-type of fluid where a smooth transition from a dust dominated model to a de Sitter like one takes place.Comment: 20 pages,3 figure

    Microbiological examination of milk in Tarakeswar, India with special reference to coliforms

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    A study was carried out to assess the milk quality in Tarakeswar, India with special reference to coliforms. By standard plate count (SPC) method, out of ten raw milk samples, the microbial colonies were found to be high in six samples and the colony content was low in rest four samples. Inpasteurized milk samples, the colonies were low in seven samples and high in three samples. The methylene blue test performed for raw milk samples showed that out of ten samples, the five samples were poor, two samples were fair, two samples were good and only one sample was found to be anexcellent. Out of ten pasteurized samples, nine samples were of good quality and one was found to be excellent. Bacterial colony was found to be opaque and metallic sheen in colour prepared from five raw milk samples, and by biochemical characterization it was identified as Escherichia col
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