نتایج جستجو برای: acis
تعداد نتایج: 582 فیلتر نتایج به سال:
Abstract. Aerosol–cloud–precipitation interactions (ACIs) provide the greatest source of uncertainties in predicting changes Earth's energy budget due to poor representation marine stratocumulus and associated ACIs climate models. Using situ data from 329 cloud profiles across 24 research flights NASA ObseRvations Aerosols above CLouds their intEractionS (ORACLES) field campaign September 2016,...
As part of the Chandra GTO program we are monitoring and surveying M31 using the HRC and ACIS cameras. These observations have resolved the nuclear X-ray source into five separate sources, one of which is very soft and may (or may not!) be associated with the central super-massive black hole. In addition, the superb spatial resolution and low scattering of the Chandra telescope allows us to una...
OBJECTIVE The goal of this study was to characterize adenocarcinoma in situ (ACIS) and invasive adenocarcinoma (AdCa) of the cervix by using image histometric measurements of nuclear morphometric features. STUDY DESIGN Archival pathology slides and tissue blocks from 37 patients with ACIS, 18 with invasive AdCa, and 13 with normal cervical epithelial and glandular histology were reviewed by t...
در این مقاله، با استفاده از مدل نیروی دینامیکی کارآمد، نیروهای فرزکاری با بار جانبی کم ارائه میشوند. شبیهسازی هندسی فرآیند فرزکاری با استفاده از تکنیکهای مدلسازی صلب b-rep صورت میگیرد. روشهای دامنه فرکانسی و آنالیز المان محدود زمانی (tfea) برای پیشبینی دالانهای پایداری استفاده شده است. روش دامنه فرکانسی سریعترین روشی است که به جز برای موارد فرزکاری با بار جانبی کم، دقیق نیز میباشد. رو...
This paper presents ACIS, an Autonomous Community Information System. ACIS is a proposition made to meet the rapidly changing users’ requirements and cope with the extreme dynamism in current information services. ACIS is a decentralized bilateral-hierarchy architecture formed by a community of individual end-users (community members) having the same interests and demands at specified time and ...
Nef polyhedra in d-dimensional space are the closure of half-spaces under boolean set operations. Consequently, they can represent non-manifold situations, open and closed sets, mixed-dimensional complexes, and they are closed under all boolean and topological operations, such as complement and boundary. The generality of Nef complexes is essential for some applications. In this thesis, we pres...
We report on Chandra ACIS and XMM-Newton MOS/PN imaging observations of two pulsar wind nebulae (K3/PSR J1420−6048 and G313.3+0.1=‘the rabbit’) associated with the Galactic unidentified γ-ray source GeV J1417−6100. With the excellent ACIS imaging the very energetic pulsar PSR J1420−6048 is separated from its surrounding nebula. This nebula has surprisingly little compact structure, although a f...
We describe an observation of the X-ray luminous SN1978K in NGC 1313 using the ACIS detector on Chandra and an archival Newton EPIC observation. The models that provided good fits to the ASCA SIS and GIS and the ROSAT PSPC spectra no longer do so for the ACIS and EPIC spectra. The best-fit model to the ACIS and EPIC spectra are dual hot plasma models (vmekal); one component is soft (T = 0.61 −0...
This paper describes the development of CRMFLX, an ion model for the outer magnetosphere developed for scheduling periods when the Advanced CCD Imaging Spectrometer (ACIS) instrument onboard the Chandra X-ray Observatory can be safely moved into the focal plane position required for science observations. Because exposure to protons with energies of approximately 100 keV to 200 keV has been show...
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