2,922 research outputs found

    German Science Center for the Solar Dynamics Observatory

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    A data and computation center for helioseismology has been set up at the Max Planck Institute for Solar System Research in Germany to prepare for the SDO mission. Here we present the system infrastructure and the scientific aims of this project, which is funded through grants from the German Aerospace Center and the European Research Council

    Social analysis Iraj Mirza’s poems and Malek O-Sho'ara Bahar’s poems

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    Iraj Mirza and Bahar were born out around the Iranian Constitutional Revolution in their literary life. This revolution has had a profound impact on poetry and social thinking. As the poets mentioned in the past glories of the past and paid this tendency is usually seen in the society is in crisis and disaster and the crisis and disaster was nothing but colonization of foreign countries. Freedom and liberal center of the Revolution and thus poets and writers sought to people, the more liberal the lead. Due to this, the aim of this paper is to study the social implications of Iraj Mirza’s poems and Malek o-Sho'ara Bahar’s poems and compare them.Keywords: Iraj Mirza, Malek o-Sho'ara Bahar, the social themes of freedom, patriotis

    Animal and Human Depictions on Artefacts from Early Anglo-Saxon Graves in the Light of Theories of Material Culture

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    This dissertation explores the relationship between animal and human motifs on early Anglo-Saxon (AD 450–650) artefacts and the individuals with whom the objects are buried, as well as the wider communities to which they belong. A sample of sites was taken from the two historical regions of East Anglia and Wessex, compiling data such as object type and material, sex and age of individuals, and the human and animal motifs depicted. From a total of 32 sites, 5560 graves were analyzed; of these, 198 graves from 28 sites contained artefacts with anthropomorphic and/or zoomorphic decoration. Anthropological and material culture theories of totemism, shamanism, animism, and object agency were employed in the interpretation of results to consider the symbolic meaning of anthropomorphically- and zoomorphically-decorated objects, and how they may have reflected the social organization and ideologies of communities in early Anglo-Saxon England. This regional analysis brought geographically-distinct findings, such as differences in the types of motifs and materials used on anthropomorphic/zoomorphic objects, arguing for the existence of varied ontological beliefs including totemism, shamanism, and animism. It also enabled the investigation of widespread tendencies of motif usage throughout England during the early period, which showed a lack of observable patterns in the combinations of species used, implying the absence of a uniform set of ontological beliefs

    Optimal Control of a Class of Timed Discrete Event Systems with Shared Resources, An Approach Based on the Hadamard Product of Series in Dioids

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    The topic of this paper is modeling and control of timed discrete event systems in a dioid framework if systems operate under the restriction of shared resources. The behavior of such systems can be elegantly modeled using the Hadamard product of series in dioids. Using residuation of the Hadamard product, it is possible to compute optimal control, where optimality is in the sense of a lexicographical order reflecting the chosen prioritization of subsystems. The paper concludes with an example, illustrating the efficiency of the proposed method

    Evaluation of Carotenoids and Chlorophyll as Natural Resources for Food in Spirulina Microalgae

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    Microalgae can produce various natural products such as pigments, enzymes, unique fatty acids and vitamins that benefit humans. The objective of the study was evaluation of carotenoids (beta carotene, zeathanthin, lutein, lycopene and astaxanthin) and chlorophyll a in spirulina microalgae. Spirulina powder has been produced by Jordan’s method in Iran. Carotenoids were extracted from Spirulina platensis by adopting a method described by Reboul; then the sample was prepared and injected into a HPLC instrument with triplicate injection. Chlorophyll`s biomass content was determined by spectrophotometer. After assaying the curves of HPLC, the amount of chlorophyll a, astaxanthin, beta carotene, lycopene, zeaxanthin and lutein in spirulina was determined as 4.3±0.14, 0.21±0.02, 7393±2.76, 741±2.32, 6652±3.69 and 424±2.83 μg/ml respectively. Beta carotene account for 80% of the carotenoids present in spirulina after that zeaxanthin was most. At last, Spirulina was a good source for carotenoids as a pro-vitamin A in organisms

    Lymphomas in Golestan province of Iran: Results of a population-based cancer registry

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    Introduction: Malignancies of lymphoid cells can be divided into Hodgkin and non-Hodgkin lymphomas (NHL) on the basis of pathologic features, clinical manifestations and treatment. In this paper we present data on lymphomas in Golestan province, in the northeast of Iran, during 2004-2006, using three years results of the Golestan population-based cancer registry (GPCR), a voting member of the International Association of Cancer Registries (IACR). Methods: GPCR started collecting data on all cancers from all public and private diagnostic and therapeutic centers (hospitals, specialist physicians' offices, pathology, laboratory, and imaging centers) of Golestan province in 2004. Here, we used the Iranian national census data to identify the population characteristics of this geographical area. The last census was done in 2006 and the next one will be done in 2011. The population data for years between the national census intervals are retrieved from provincial census done annually by health deputy of Golestan University of Medical Sciences (GOUMS). Results: A total of 5,076 cancer cases were diagnosed in the GPCR between 2004 and 2006. Of these, 237 (4.67 %) were lymphomas, among the ten top cancers of this area, the patients having a mean (±SD) age of 45.2 (±20.9) years. The number of cases, frequency, age specific rates, crude rates and age standardized incidence rates (ASR) (per 100,000 personyears) for lymphomas in males and females are presented. Conclusion: It could be concluded that according to available therapies for HL and NHL, the outcome of the patients could be improved in this area, due to the better diagnostic and therapeutic methods now available

    Real-time, high frequency QRS electrocardiograph

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    Real time cardiac electrical data are received from a patient, manipulated to determine various useful aspects of the ECG signal, and displayed in real time in a useful form on a computer screen or monitor. The monitor displays the high frequency data from the QRS complex in units of microvolts, juxtaposed with a display of conventional ECG data in units of millivolts or microvolts. The high frequency data are analyzed for their root mean square (RMS) voltage values and the discrete RMS values and related parameters are displayed in real time. The high frequency data from the QRS complex are analyzed with imbedded algorithms to determine the presence or absence of reduced amplitude zones, referred to herein as RAZs. RAZs are displayed as go, no-go signals on the computer monitor. The RMS and related values of the high frequency components are displayed as time varying signals, and the presence or absence of RAZs may be similarly displayed over time

    Real-time, high frequency QRS electrocardiograph with reduced amplitude zone detection

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    Real time cardiac electrical data are received from a patient, manipulated to determine various useful aspects of the ECG signal, and displayed in real time in a useful form on a computer screen or monitor. The monitor displays the high frequency data from the QRS complex in units of microvolts, juxtaposed with a display of conventional ECG data in units of millivolts or microvolts. The high frequency data are analyzed for their root mean square (RMS) voltage values and the discrete RMS values and related parameters are displayed in real time. The high frequency data from the QRS complex are analyzed with imbedded algorithms to determine the presence or absence of reduced amplitude zones, referred to herein as ''RAZs''. RAZs are displayed as ''go, no-go'' signals on the computer monitor. The RMS and related values of the high frequency components are displayed as time varying signals, and the presence or absence of RAZs may be similarly displayed over time
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