5,998 research outputs found

    Safety and Ergonomics of Iron Casts Manufacturing

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    The article presents the issues of production analysis of iron casts manufacturing using automated foundry lines. To streamline the production fl ow, it was proposed to change the location of workstations related to grinding, control and machining of casts. Within the process of constant improvement of manufacturing processes, the aspect of work ergonomics at a workstation was taken into account. As a result of the undertaken actions, some activities without added value were eliminated, effi ciency was increased and prime costs of manufacturing casts with regard to fi nishing treatment were lowered

    Property insurance loss distributions

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    Property Claim Services (PCS) provides indices for losses resulting from catastrophic events in the US. In this paper we study these indices and take a closer look at distributions underlying insurance claims. Surprisingly, the lognormal distribution seems to give a better fit than the Paretian one. Moreover, lagged autocorrelation study reveals a mean-reverting structure of indices returns.Econophysics; Property insurance; Loss distribution; PCS index;

    Impact of cirrus on the surface radiative environment at the FIRE ETLA Palisades, NY site

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    FIRE Extended Time Limited Area (ETLA) observations provide year round information critical to gaining a better understanding of cloud/climate interactions. The Lamont/Rutgers team has participated in the ETLS program through the collection and analysis of shortwave and longwave downwelling irradiances at Palisades, NY. These data are providing useful information on surface radiative fluxes with respect to sky condition, solar zenith angle and season. Their utility extends to the calibration and validation of cloud/radiative models and satellite cloud and radiative retrievals. The impact cirrus clouds have on the surface radiative environment is examined using Palisades ETLA information on atmospheric transmissivities and downwelling longwave fluxes for winter and summer cirrus and clear sky episodes in 1987

    FIRE extended time/limited area observations at Palisades, New York

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    Downwelling shortwave and longwave irradiation are being continuously monitored at Palisades, New York as part of the First International Satellite Cloud Climatology Project (ISCCP) Regional Experiment (FIRE) Extended Time/Limited Area Initiative. In addition, fisheye (180 degree) sky photographs are taken at the times of NOAA 9 and LANDSAT satellite overpasses on select days, particularly when cirrus clouds are present. Measurements of incoming shortwave (0.28 to 2.80 microns) hemispheric and diffuse, hemispheric near infrared (0.7 to 2.80 microns), and downwelling hemispheric infrared (4.0 to 50.0 microns) irradiation have been made from a rooftop location on the grounds of the Lamont-Doherty Geological Observatory since December 1986. The three Eppley Precision Spectral Pyranometers and the Eppley Pyrgeometer used to measure these variables were calibrated with Colorado State University instruments at Madison, Wisconsin as part of the FIRE Intensive Laboratory. Pyrgeometer output contains an adjustment for body temperature but not for dome temperature. Data are transmitted to a Campbell CR-21 Digital Recorder, where one minute averages of ten second samples are stored and subsequently dumped to a cassette recorder. Using a Campbell C-20 Cassette Interface, these data are transferred to an Apple Macintosh computer for analysis and for archiving on floppy disks. In addition to the raw irradiances collected, variables derived from these data are generated and stored. These include: the ratio of near infrared irradiation to visible irradiation and the fraction of the full shortwave irradiation which is diffuse; and will soon include: shortwave transmissivity and optical depth in the shortwave. Sky photographs are taken with an Olympus OM2-N 35 mm camera and are timed to be coincident with overpassing NOAA and LANDSAT satellites. Palisades is within the field of view of the NOAA 9 daily in the middle to late afternoon. The satellite viewing angle is within 45 degrees of nadir over Palisades on approximately half of the passes

    Design of the roof structure over the garage

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    Bakalářská práce „Návrh střešní konstrukce nad garážemi“ se zabývá návrhem a dimenzováním železobetonové střešní konstrukce, kterou tvoří spojitá křížem vyztužená deska. Deska je podepřená trámy v obou směrech. Cílem práce je návrh a posouzení mezního stavu únosnosti stropní desky a trámů. Pro výpočet konstrukce byl vytvořen výpočtový model v softwarovém prostředí Scia Engineer. Výsledné hodnoty vnitřních sil byly ověřeny metodou náhradních nosníků. Vypracována je výkresová dokumentace řešené konstrukce.The bachelor´s thesis „Design of the roof structure over the garage“ deals design and dimensioning of concrete roof structure, consisting continuous two way slab. The slab is suportted by beams in both directions. The aim of the project is to desing and evaluate the ultimate limit state of reinforced concrete slabs and beams. Also was created computational model to analysis the construction, model was created in software Scia Engineer. To verify the resulting values of internal forces was used to the method of replacement beans. Finally was made drawings of roof structure.

    Reply With: Proactive Recommendation of Email Attachments

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    Email responses often contain items-such as a file or a hyperlink to an external document-that are attached to or included inline in the body of the message. Analysis of an enterprise email corpus reveals that 35% of the time when users include these items as part of their response, the attachable item is already present in their inbox or sent folder. A modern email client can proactively retrieve relevant attachable items from the user's past emails based on the context of the current conversation, and recommend them for inclusion, to reduce the time and effort involved in composing the response. In this paper, we propose a weakly supervised learning framework for recommending attachable items to the user. As email search systems are commonly available, we constrain the recommendation task to formulating effective search queries from the context of the conversations. The query is submitted to an existing IR system to retrieve relevant items for attachment. We also present a novel strategy for generating labels from an email corpus---without the need for manual annotations---that can be used to train and evaluate the query formulation model. In addition, we describe a deep convolutional neural network that demonstrates satisfactory performance on this query formulation task when evaluated on the publicly available Avocado dataset and a proprietary dataset of internal emails obtained through an employee participation program.Comment: CIKM2017. Proceedings of the 26th ACM International Conference on Information and Knowledge Management. 201

    Education Computer Program for Demonstration Methods of 3D Objects Texturing

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    Práca sa zaoberá vývojom aplikácie pre demonštrovanie metód texturovania 3D objektov. Práca obsahuje teoreticky rozobrané jednotlivé metódy textúrovania, ktoré tvoria základ pre návrh obsahu demonštrácie. Požiadavky na aplikáciu sú analyzované a aplikované pre vytvorenie návrhu aplikácie. Postupy pri implementácii jednotlivých metód textúrovania a popis ovládacích prvkov aplikácie sú popísané v závere práce. Program môže slúžiť ako demonštračný  pri výučbe alebo tiež ako študijný materiál pre žiakov.This work is focused on developing an application for demonstration methods of 3D objects texturing. Work contains theoretical description of particular texturing methods which create base for designing subject of demonstration. Application requirements are analysed and applied to create aplication design. Aproaches used in implementing particular texturing methods and description of application controls are discussed in final part. Application can be used as demonstration tool in lectures or as study material for learners.

    The Value of a College Education: Estimating the Effect of Teacher Preparation on Student Achievement

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    Federal legislation currently holds institutions of higher education accountable for the quality of teachers that they produce. However research has yet to demonstrate that teacher preparation programs (TPPs) have differential effects on the quality of teachers they produce in terms of student achievement. This study uses data from a sample of 2,582 5th grade math students in an urban school district in Kentucky and a school fixed effects design to explore the variation in average TPP effects. The authors find that TPPs are differentially effective in training teachers, which in turn impacts student performance on 5th grade math scores. There is also some indication that these differential effects converge around teachers’ fifth year of teaching.Student achievement; teacher preparation, teacher effects

    The Activities and Responsibilities of the Municipal Police of the Capital City of Prague in the Field of Security and Crisis Management.

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    Bakalářská práce s názvem Činnost a úkoly Městské policie hl. m. Prahy v oblasti bezpečnosti a krizového řízení se dělí na dvě části. V teoretické části je stručně popsán vývoj obecní policie (městské policie), tak aby si čtenář utvořil představu, jak se městská policie v průběhu let vyvíjela. V následujících kapitolách se budeme zabývat náborem a předpoklady uchazečů o zaměstnání strážníka městské policie včetně rozsahu oprávnění strážníků, které jako úřední osoby v souladu s právními předpisy České republiky využívají. Následně popíšeme výcvik uvedených uchazečů se zaměřením na činnost a úkoly městské policie, která se v případě úspěšné složení zkoušky stane jejich každodenní rutinou.in the area of security and crisis management is divided into two parts. The theoretical part briefly describes the development of local police (municipal police), so that the reader can make up an idea of how the municipal police has developer over the years. In the following chapters we will deal with the recruitment and qualifications authorizations, which they as persons in authority make use of in accordance with legal regulations of the Czech Republic. Subsequently, we will describe training of the mentioned applicants with the focus on activity and tasks of the municipal police, which will in the case of passing the exam become their daily routine
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