Initial observations of fine plasma structures at the flank magnetopause with the complex plasma analyzer SCA-1 onboard the Interball Tail Probe

International audienceThe fast plasma analyzer EU-1 of the SCA-1 complex plasma spectrometer is installed onboard the Interball Tail Probe (Interball-1). It provides fast three-dimensional measurements of the ion distribution function on the low-spin-rate Prognoz satellite (about 2min). The EU-1 ion spectrometer with virtual aperture consists of two detectors with 16 E/Q narrow-angle analyzers and electrostatic scanners. This configuration allows one to measure the ion distribution function in three dimensions (over 15 energy steps in 50 eV/Q?5.0 keV/Q energy range in 64 directions) in 7.5 s, which makes it independent of the slow rotation speed of the satellite. A description of the instrument and its capabilities is given. We present here the preliminary results of measurements of ions for two cases of the dawn low- and mid-latitude magnetopause crossings. The properties of observed ion structures and their tentative explanation are presented. The 12 September 1995 pass at low latitude at about 90° solar-zenith angle on the dawn side of the magnetosphere is considered in more detail. Dispersive ions are seen at the edge of the magnetopause and at the edges of subsequently observed plasma structures. Changes in ion velocity distribution in plasma structures observed after the first magnetopause crossing suggest that what resembles multiple magnetopause crossings may be plasma blobs penetrating the magnetosphere. Observed variations of plasma parameters near magnetopause structures suggest nonstationary reconnection as the most probable mechanism for observed structures

Gastric cancer with multiple metastases in pregnancy: a case report

The mortality rate in gastric cancer during pregnancy is very high, which dictates the need to research and improve the methods of early diagnosis of malignancies, as well as studying the pathogenesis of malignant tumors in pregnant women. We report a lethal case of gastric cancer in a pregnant woman. The findings of the autopsy, histological, histochemical and immunohistochemical examinations verified gastric signet ring cells carcinoma with multiple metastases and infiltration of the placental intervillous space. The possible pathogenesis of cancer with changes in the hormonal background occurring in pregnant women is discussed. Understanding the endocrine mechanisms of carcinoma pathogenesis will be useful for developing new therapies for gastric cancer

Goodpasture syndrome: case report

The Goodpasture syndrome is an immune-inflammatory pathology characterized by the formation of autoantibodies directed against the basement membranes of the renal glomeruli and pulmonary alveoli, manifested by hemorrhagic pneumonitis in combination with pulmonary hemorrhage (hemoptysis) and glomerulonephritis. To date, etiological mechanisms of the disease are unknown. Clinical observations indicate a relationship between the development of Goodpasture syndrome and viral infection, intake of medications, industrial hazards. The incidence of Goodpasture syndrome is estimated to be 1 case per 1 million population. Due to the rarity of this pathology, each case of Goodpasture syndrome is of great theoretical and practical interest. The authors conducted the analysis of clinical and morphological observation of Goodpasture syndrome. The postmortem study revealed morphological signs indicating the presence of Goodpasture syndrome inter vivos, whose main manifestations were hemorrhagic pneumonitis and mesangial-proliferative glomerulonephritis with fibroplastic transformation. The reported case is also of particular interest in terms of correct formulation of the final diagnosis, since there was a combination of two diseases: Goodpasture syndrome and phlegmonous appendicitis with focal peritonitis. In this case, pulmonary heart failure should be considered as the direct cause of death,since pulmonary lesions prevailed over the renal ones, which is fully consistent with the clinical presentation and findings of the laboratory tests. The diagnosis of Goodpasture syndrome made at the hospital is not always timely, as can be evidenced by patient’s severe condition, and it requires careful differentiation with a number of other diseases involving hemorrhagic pulmonary and renal syndrome, and the urgent need for active therapy with immunosuppressants, including prednisone and cytostatics. The timely adequate treatment significantly improves the prognosis.; У роботі наведені сучасні дані зарубіжної літератури, які стосуються синдрому Гудпасчера – імунно-запальної патології, що характеризується утворенням аутоантитіл до базальних мембран ниркових клубочків і легеневих альвеол, і виявляється геморагічним пневмонітом в поєднанні з легеневою кровотечею (кровохарканням) та гломерулонефритом. Етіологічні механізми захворювання достовірно не визначені. Клінічні спостереження вказують на зв'язок розвитку синдрому Гудпасчера з перенесеною вірусною інфекцією, прийомом лікарських препаратів, виробничою шкодою. Частота розвитку синдрому Гудпасчера становить 1 випадок на 1 млн. населення. У зв'язку з рідкістю даної патології кожен випадок синдрому Гудпасчера представляє великий теоретичний і практичний інтерес. Проведений аналіз власного клініко-морфологічного випадку синдрому Гудпасчера. При проведенні патологоанатомічного дослідження тіла померлого виявлені морфологічні ознаки, що свідчать про наявність при житті синдрому Гудпасчера, основними проявами якого слід вважати геморагічний пневмоніт і мезангіопроліферативний гломерулонефрит з подальшою фібропластичною трансформацією клубочків. В даному випадку безпосередньою причиною смерті слід вважати гостру легенево-серцеву недостатність, так як патоморфологічні зміни в легенях превалювали над такими в нирках, що повністю відповідає клінічній картині та результатам лабораторних досліджень. Певний інтерес даний випадок представляє також в сенсі грамотного формулювання остаточного діагнозу, так як можна говорити про поєднання двох захворювань: синдрому Гудпасчера і гострого флегмонозного апендициту з місцевим перитонітом. Постановка діагнозу синдрому Гудпасчера в клініці не завжди буває своєчасним, свідчить про важкий стан пацієнта, вимагає ретельної диференціальної діагностики з рядом інших захворювань, що супроводжуються геморагічним легенево-нирковим синдромом, і потребує невідкладного призначення активної терапії імуносупресорами, включаючи преднізолон і цитостатики. Вчасно розпочате адекватне лікування значно покращує прогноз пацієнтів

Intensity noise of injection-locked lasers: Quantum theory using a linearized input-output method

We derive analytical expressions for the quantum-noise spectra of an atomic laser using a linearized input-output method. We generalize the method to the problem of injection-locked lasers. We identify three distinct spectral noise regimes in the solution, unifying previous results. The approach offers insights into the physical processes and is especially suited for comparison with experiment. The quantum spectral noise properties of the pump laser and the injected laser appear explicitly in the solution

All-sky LIGO Search for Periodic Gravitational Waves in the Early S5 Data

We report on an all-sky search with the LIGO detectors for periodic gravitational waves in the frequency range 50--1100 Hz and with the frequency's time derivative in the range -5.0E-9 Hz/s to zero. Data from the first eight months of the fifth LIGO science run (S5) have been used in this search, which is based on a semi-coherent method (PowerFlux) of summing strain power. Observing no evidence of periodic gravitational radiation, we report 95% confidence-level upper limits on radiation emitted by any unknown isolated rotating neutron stars within the search range. Strain limits below 1.E-24 are obtained over a 200-Hz band, and the sensitivity improvement over previous searches increases the spatial volume sampled by an average factor of about 100 over the entire search band. For a neutron star with nominal equatorial ellipticity of 1.0E-6, the search is sensitive to distances as great as 500 pc--a range that could encompass many undiscovered neutron stars, albeit only a tiny fraction of which would likely be rotating fast enough to be accessible to LIGO. This ellipticity is at the upper range thought to be sustainable by conventional neutron stars and well below the maximum sustainable by a strange quark star.Comment: 6 pages, 1 figur

First LIGO search for gravitational wave bursts from cosmic (super)strings

We report on a matched-filter search for gravitational wave bursts from cosmic string cusps using LIGO data from the fourth science run (S4) which took place in February and March 2005. No gravitational waves were detected in 14.9 days of data from times when all three LIGO detectors were operating. We interpret the result in terms of a frequentist upper limit on the rate of gravitational wave bursts and use the limits on the rate to constrain the parameter space (string tension, reconnection probability, and loop sizes) of cosmic string models.Comment: 11 pages, 3 figures. Replaced with version submitted to PR