cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
An experimental and theoretical investigation of the characterstics of dark illuminated junction diodes of germanium and silicon.
Creators: name: Pinson, William Edwin
Publisher: name: University of British Columbia
Year: 2012

description: Measurements have been made on a variety of germanium and silicon junction diodes in order to determine departures from the ideal behavior both under illuminated and dark conditions. The diodes included alloyed, grown and diffused junction types and the experimental study was largely confined to forward voltage. Carriers injected by a forward voltage into the bulk regions of a p-n junction in Ge or Si reduce the resistances of these regions, A model of a photodiode consisting of an ideal diode (Shockley, 1949) in series with this carrier modulated resistance produces good agreement with the experimentally observed dark chs.; in one Ge alloy diode the agreement was exact up to at least 0,7V forward voltage. For large forward currents (density of injected carriers comparable to injected carrier density) the Shockley expression relating I and V is no longer valid nor consequently is the conductivity modulation theory. This theory, making use of the experimental dark chs, and the experimental dynamic capacity measurements, is able to deduce many of the parameters of the diode material e.g. Ƭ𝞺, Pո,Ψo. The chs. of the diode dark and illuminated have been found to intersect at large forward currents. Theoretical investigation of the condition for crossover in various models of the diode is made. The physical meaning of this condition is that at some forward voltage the resistance of the diode is sufficiently reduced on illumination to offset the effect of the opposed internal photo-e.m.f.. For an ideal diode the relation between the short circuit photo-current and open-circuit photo-e.m.f. (photochs.) should simply be the same as the dark forward chs., except for a reversal of sign of the current. The fact that the experimental photochs falls below the ideal photochs is attributed to internal resistance in the diode and an expression is developed from this assumption; the theoretical expression is largely consistent with experiment. Several other models are examined for the non-ideal behavior of junction diodes which attempt to take into account the possible effects of the resistance of the bulk material and of the electrode-semiconductor contact; the implications of non-linear recombination are also investgated. It is found that none of these alternative models is as successful as the conductivity-modulation scheme in explaining the dark, the illuminated and the photocharacteristics.
Lorentz violation and black-hole thermodynamics
Creators: name: Betschart, G.
name: Kant, E.
name: Klinkhamer, F. R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider nonstandard photons from nonbirefringent modified Maxwell theory and discuss their propagation in a fixed Schwarzschild spacetime background. This particular modification of Maxwell theory is Lorentz-violating and allows for maximal photon velocities differing from the causal speed c of the asymptotic background spacetime. In the limit of geometrical optics, light rays from modified Maxwell theory are found to propagate along null geodesics in an effective metric. We observe that not every Lorentz-violating theory with multiple maximal velocities different from the causal speed c modifies the notion of the event horizon, contrary to naive expectations. This result implies that not every Lorentz-violating theory with multiple maximal velocities necessarily leads to a contradiction with the generalized second law of thermodynamics.
description: 28 pages; v4: published version
Protecting unparticles from the MSSM Higgs sector
Creators: name: Nelson, Ann E.
name: Piai, Maurizio
name: Spitzer, Christopher
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We construct a model of an unparticle sector consisting of a supersymmetric SU(N) gauge theory with the number of flavors in the Seiberg conformal window. We couple this sector to the MSSM via heavy messengers. The resulting low energy theory has a Higgs coupling to unparticles. The Higgs vev drives the hidden Seiberg sector to a new conformal fixed point. The coupling to the Higgs mediates supersymmetry breaking to the Seiberg sector, and breaks conformal invariance at a lower scale. The low energy theory contains light stable and metastable mesons. Higgs decay into this sector gives signatures which are similar to those of "hidden valley" models. Decays of the lightest superpartner of standard model particles into the hidden sector reveal potentially observable unparticle kinematics.
description: References added. 11 pages, 4 figures
Формирование запрограммированного урожая сахарной свёклы путём воздействия основными элементами регулирования
Creators: name: Ш.О. Бастаубаева
name: М.Б. Бекбатыров
name: Л.К. Табынбаева
name: А.М. Бураходжа
Publisher: name: Сахар
Year: 2021
Subjects: сахарная свёкла
продукционный процесс
густота стояния
удобрения
фотосинтез
урожайность
продуктивность пашни
автоматизированные агротехнологии
sugar beet
production process
planting density
fertilizers
photosynthesis
productivity
arable land productivity
automated agricultural technologies.

description: В статье отражены гибкие технологии возделывания сахарной свёклы, позволяющие при неблагоприятных производственных и экстремальных метеорологических условиях снизить нарушения хода жизненных процессов и получить запланированный уровень урожая сахарной свёклы путём воздействия основными элементами регулирования (полив, удобрения, сроки посева, густота насаждения). Методика проведения исследований заключалась в изучении фотосинтетической деятельности продуктивности посевов: определение накопления сырой и сухой биомассы – весовым методом; измерение площади ассимиляционного аппарата – методом высечек; приход фотосинтетически активной радиации. Фенологические наблюдения за прохождением основных фаз и периодов роста и развития растений и учёт густоты растений проведены по общепринятой методике. Результаты исследований могут служить основой для внедрения гибких технологий при программировании урожаев сахарной свёклы на орошаемых светло-каштановых почвах.
description: The article reflects flexible technologies for the cultivation of sugar beets, which allow, under unfavorable production processes and extreme meteorological conditions, to reduce the performance of life processes and to obtain the planned level of sugar beet yield by performing control elements (watering, fertilization, sowing time, planting density). Research methodology: study of photosynthetic activity of crop productivity: accumulation of wet and dry biomass – by weight method; determination of the area of the assimilation apparatus – by the method of cutting; the arrival of photosynthetically active radiation.
Tripartite to Bipartite Entanglement Transformations and Polynomial Identity Testing
Creators: name: Chitambar, Eric
name: Duan, Runyao
name: Shi, Yaoyun
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider the problem of deciding if a given three-party entangled pure state can be converted, with a non-zero success probability, into a given two-party pure state through local quantum operations and classical communication. We show that this question is equivalent to the well-known computational problem of deciding if a multivariate polynomial is identically zero. Efficient randomized algorithms developed to study the latter can thus be applied to the question of tripartite to bipartite entanglement transformations.
A direct limit on the turbulent velocity of the intracluster medium in the core of Abell 1835 from XMM-Newton
Creators: name: Sanders, J. S.
name: Fabian, A. C.
name: Smith, R. K.
name: Peterson, J. R.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We examine deep XMM-Newton Reflection Grating Spectrometer (RGS) observations of the X-ray luminous galaxy cluster A1835. For the first time in a galaxy cluster we place direct limits on turbulent broadening of the emission lines. This is possible because the coolest X-ray emitting gas in the cluster, which is responsible for the lines, occupies a small region within the core. The most conservative determination of the 90 per cent upper limit on line-of-sight, non-thermal, velocity broadening is 274 km/s, measured from the emission lines originating within 30 kpc radius. The ratio of turbulent to thermal energy density in the core is therefore less than 13 per cent. There are no emission lines in the spectrum showing evidence for gas below ~3.5 keV. We examine the quantity of gas as a function of temperature and place a limit of 140 Msun/yr (90 per cent) for gas cooling radiatively below 3.85 keV.
description: 5 pages, accepted by MNRAS, includes minor change suggested by referee
title: Ð¡ÑÐ°Ð²Ð½Ð¸ÑÐµÐ»ÑÐ½Ð°Ñ ÑÐ¾Ð²Ð°ÑÐ¾Ð²ÐµÐ´Ð½Ð°Ñ Ñ Ð°ÑÐ°ÐºÑÐµÑÐ¸ÑÑÐ¸ÐºÐ°, ÑÐºÑÐ¿ÐµÑÑÐ¸Ð·Ð° ÐºÐ°ÑÐµÑÑÐ²Ð° Ð¿Ð°ÑÑÐµÑÐ¸Ð·Ð¾Ð²Ð°Ð½Ð½Ð¾Ð³Ð¾ Ð¼Ð¾Ð»Ð¾ÐºÐ° Ð¸ Ð¾ÑÐµÐ½ÐºÐ° ÑÑÑÐµÐºÑÐ¸Ð²Ð½Ð¾ÑÑÐ¸ ÑÐµÐ°Ð»Ð¸Ð·Ð°ÑÐ¸Ð¸ Ð¼Ð¾Ð»Ð¾ÑÐ½ÑÑ Ð¿ÑÐ¾Ð´ÑÐºÑÐ¾Ð² Ð² ÑÐ¾ÑÐ³Ð¾Ð²Ð¾Ð¼ Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ð¸
title: Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÑÐºÐ°Ñ ÑÐ°Ð±Ð¾ÑÐ°
titleType: Subtitle
Creators: name: Ð¥Ð°ÑÐ¸ÑÐ¾Ð½Ð¾Ð²Ð°, Ð¢Ð°ÑÑÑÐ½Ð°
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2016
Subjects: ÑÐ¾ÑÐ³Ð¾Ð²Ð¾Ðµ Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ðµ
ÑÐºÑÐ¿ÐµÑÑÐ¸Ð·Ð° ÐºÐ°ÑÐµÑÑÐ²Ð°
Ð¼Ð¾Ð»Ð¾ÐºÐ¾
Ð¿Ð°ÑÑÐµÑÐ¸Ð·Ð¾Ð²Ð°Ð½Ð½Ð¾Ðµ Ð¼Ð¾Ð»Ð¾ÐºÐ¾
Ð¼Ð¾Ð»Ð¾ÑÐ½ÑÐµ Ð¿ÑÐ¾Ð´ÑÐºÑÑ
milk
trade enterprise
quality expertise
pasteurized milk
dairy products

description: Ð ÑÐ°Ð±Ð¾ÑÐµ ÑÐ°ÑÑÐ¼Ð¾ÑÑÐµÐ½Ñ ÐºÐ»Ð°ÑÑÐ¸ÑÐ¸ÐºÐ°ÑÐ¸Ñ, ÑÐ¾Ð²ÑÐµÐ¼ÐµÐ½Ð½ÑÐ¹ Ð°ÑÑÐ¾ÑÑÐ¸Ð¼ÐµÐ½Ñ Ð¸ Ð²Ð¾Ð¿ÑÐ¾ÑÑ Ð¾ÑÐµÐ½ÐºÐ¸ ÐºÐ°ÑÐµÑÑÐ²Ð° Ð¿Ð¸ÑÑÐµÐ²Ð¾Ð³Ð¾ Ð¿Ð°ÑÑÐµÑÐ¸Ð·Ð¾Ð²Ð°Ð½Ð½Ð¾Ð³Ð¾ Ð¼Ð¾Ð»Ð¾ÐºÐ°. ÐÑÐµÐ´ÑÑÐ°Ð²Ð»ÐµÐ½Ñ ÑÐµÐ»Ð¸, Ð·Ð°Ð´Ð°ÑÐ¸ Ð¸ ÑÐµÐ·ÑÐ»ÑÑÐ°ÑÑ ÑÐºÑÐ¿ÐµÑÑÐ¸Ð·Ñ ÐºÐ°ÑÐµÑÑÐ²Ð° Ð¿Ð¸ÑÑÐµÐ²Ð¾Ð³Ð¾ Ð¼Ð¾Ð»Ð¾ÐºÐ° 2,5% Ð¶Ð¸ÑÐ½Ð¾ÑÑÐ¸ Ð¿Ð¾ Ð¾ÑÐ³Ð°Ð½Ð¾Ð»ÐµÐ¿ÑÐ¸ÑÐµÑÐºÐ¸Ð¼ Ð¸ ÑÐ¸Ð·Ð¸ÐºÐ¾-ÑÐ¸Ð¼Ð¸ÑÐµÑÐºÐ¸Ð¼ Ð¿Ð¾ÐºÐ°Ð·Ð°ÑÐµÐ»ÑÐ¼. Ð Ð°ÑÑÐ¼Ð¾ÑÑÐµÐ½Ð° ÑÐºÐ¾Ð½Ð¾Ð¼Ð¸ÐºÐ¾-Ð¾ÑÐ³Ð°Ð½Ð¸Ð·Ð°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÑÑÑÐºÑÑÑÐ° ÑÐ¾Ð·Ð½Ð¸ÑÐ½Ð¾Ð³Ð¾ ÑÐ¾ÑÐ³Ð¾Ð²Ð¾Ð³Ð¾ Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ñ Â«ÐÐ°Ð³Ð½Ð¸ÑÂ» Ð² Ð³. Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ Ð¸ Ð¾ÑÐµÐ½ÐµÐ½Ð° ÑÑÑÐµÐºÑÐ¸Ð²Ð½Ð¾ÑÑÑ ÑÐµÐ°Ð»Ð¸Ð·Ð°ÑÐ¸Ð¸ Ð¼Ð¾Ð»Ð¾ÑÐ½Ð¾Ð¹ Ð¿ÑÐ¾Ð´ÑÐºÑÐ¸Ð¸ Ð½Ð° Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ð¸.
description: In the final qualifying work âCommodity research, quality examination of pasteurized milk and evaluation of dairy products selling in the trade enterpriseâ the classification, modern product range and questions of quality evaluation of pasteurized milk are described. The goals and tasks and the results of quality examination of milk with 2,5% fat content by organoleptic and physic-chemical quality indices are represented. The economical and organizational characteristics of retail trade enterprise âMagnitâ in St. Petersburg are shown and the effectiveness of dairy products selling in the enterprise has been evaluated.
High yield fabrication of chemically reduced graphene oxide field effect transistors by dielectrophoresis
Creators: name: Joung, Daeha
name: Chunder, A.
name: Zhai, Lei
name: Khondaker, Saiful I.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We demonstrate high yield fabrication of field effect transistors (FET) using chemically reduced graphene oxide (RGO) sheets suspended in water assembled via dielectrophoresis. The two terminal resistances of the devices were improved by an order of magnitude upon mild annealing at 200 0C in Ar/H2 environment for 1 hour. With the application of a backgate voltage, all of the devices showed FET behavior with maximum hole and electron mobilities of 4.0 and 1.5 cm2/Vs respectively. This study shows promise for scaled up fabrication of graphene based nanoelectronic devices.
description: 8 pages, 6 figures
I ragionieri dello spazio
Creators: Francesca Aloisio
Publisher: name: Media Inaf
Year: 2014

Ad essere in “crisi” sembra essere la luce ultravioletta, ma la realtà è che in crisi sono gli scienziati alla ricerca di una spiegazione per la divergenza che emerge tra le osservazioni reali e le simulazioni al computer che mostrano come la quantità di radiazione ultravioletta generata dalle galassie e dai quasar noti non giustifichi la ionizzazione dell’idrogeno che tiene unite le galassie
Testing AdS/CFT at LHC
Creators: name: Horowitz, W. A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: After an introduction to jet phenomenology and tests of AdS/CFT at LHC we derive the heavy quark drag of a string dangling in a shock metric of AdS space, thus generalizing the AdS/CFT drag calculations in strongly coupled thermal media to momentum loss in both hot and cold nuclear matter.
description: 6 pages, Proceedings for the 4th International Workshop on High-pT Physics at LHC, Prague, Czech Republic, February 4-7, 2009
Additional file 3 of Astrocytic APOE4 removal confers cerebrovascular protection despite increased cerebral amyloid angiopathy
Creators: name: Xiong, Monica
name: Wang, Chao
name: Gratuze, Maud
name: Saadi, Fareeha
name: Bao, Xin
name: Bosch, Megan E.
name: Lee, Choonghee
name: Jiang, Hong
name: Serrano, Javier Remolina
name: Gonzales, Ernesto R.
name: Kipnis, Michal
name: Holtzman, David M.
Publisher: name: figshare
Year: 2023
Subjects: subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Neuroscience
subject: Environmental Sciences not elsewhere classified
subject: Science Policy
subject: Immunology
subject: FOS: Clinical medicine
subject: Mental Health
subject: Computational Biology

description: Additional file 3: Figure S3. Increased CAA and reduction of amyloid plaques in the subiculum albeit no change in overall amyloid. a–d, X34 staining for fibrillar plaques/CAA (a) with percent area coverage of total X34 (b), CAA (c), and amyloid plaques (d) in the dorsal subiculum of 10-month-old 5X+AL- or 5X+AL + mice after astrocytic APOE4 removal at 2-months-of-age. e, Proportion of CAA in total X34+ staining. Scalebar: 300 µm. ∆ = males, ○ = females. Data expressed as mean ± SD, student’s t-test (two-sided) performed for all statistical analyses except (b), where Welch’s t-test was performed. **P < 0.01, ***P < 0.001. No other statistical comparisons are significant unless indicated.
Precision frequency control of a magnetic storage drum
Creators: name: Fink, Hermann Josef
Publisher: name: University of British Columbia
Year: 2012

description: In the development of a pulse position modulation analogue computer the requirement arose to control accurately the frequency of a magnetic drum. A control system was designed which compares the drum frequency to a 1000 cps tuning fork oscillator. Any deviation in phase produces a corresponding change in torque on the drum drive motor which then corrects the phase error. As part of the over-all project a precision power supply was developed. The requirements were met by modifying existing designs.
I raggi cosmici mostrano i muscoli
Creators: Marco Galliani
Publisher: name: Media Inaf
Year: 2014

Hanno tutti energie centinaia di migliaia di volte maggiori di quelle ottenibili da LHC, il più grande acceleratore di particelle del mondo, i 72 eventi registrati tra il 2008 e il 2013 dallo strumento per lo studio dei raggi cosmici di alta energia situato nel deserto dello Utah negli USA. Angelo Antonelli (INAF): "La sfida è ora riuscire a individuare senza ambiguità le sorgenti dei raggi cosmici ultra energetici. L'INAF ha un ruolo di primo piano in questo campo, anche grazie alla partecipazione al progetto internazionale CTA".
Fluctuations, Higher Order Anharmonicities, and Landau Expansion for Barium Titanate
Creators: name: Sokolov, A. I.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Correct phenomenological description of ferroelectric phase transitions in barium titanate requires accounting for eighth-order terms in the free energy expansion, in addition to the conventional sixth-order contributions. Another unusual feature of BaTiO_3 crystal is that the coefficients B_1 and B_2 of the terms P_x^4 and P_x^2*P_y^2 in the Landau expansion depend on the temperature. It is shown that the temperature dependence of B_1 and B_2 may be caused by thermal fluctuations of the polarization, provided the fourth-order anharmonicity is anomalously small, i. e. the nonlinearity of P^4 type and higher-order ones play comparable roles. Non-singular (non-critical) fluctuation contributions to B_1 and B_2 are calculated in the first approximation in sixth-order and eighth-order anharmonic constants. Both contributions increase with the temperature, which is in agreement with available experimental data. Moreover, the theory makes it possible to estimate, without any additional assumptions, the ratio of fluctuation (temperature dependent) contributions to coefficients B_1 and B_2. Theoretical value of B_1/B_2 appears to be close to that given by experiments.
description: 5 pages, 1 figure
title: ÐÑÐ°ÐºÑÐ¸ÐºÑÐ¼ Ð¿Ð¾ ÑÐ¸Ð·Ð¸ÑÐµÑÐºÐ¾Ð¹ Ñ Ð¸Ð¼Ð¸Ð¸
title: ÑÑÐµÐ±Ð½Ð¾Ðµ Ð¿Ð¾ÑÐ¾Ð±Ð¸Ðµ
titleType: Subtitle
Creators: name: ÐÐµÐ¼Ð¸Ð´Ð¾Ð², ÐÐ»ÐµÐºÑÐ°Ð½Ð´Ñ
name: Ð¤Ð¸ÑÑÐ¾Ð²Ð°, ÐÐ»ÐµÐ½Ð°
name: Ð¢ÑÑÐ¸ÐºÐ¾Ð²Ð°, ÐÑÐ¸Ð½Ð°
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2021
Subjects: Ð¤Ð¸Ð·Ð¸ÑÐµÑÐºÐ°Ñ Ñ Ð¸Ð¼Ð¸Ñ

description: Ð£ÑÐµÐ±Ð½Ð¾Ðµ Ð¿Ð¾ÑÐ¾Ð±Ð¸Ðµ Â«ÐÑÐ°ÐºÑÐ¸ÐºÑÐ¼ Ð¿Ð¾ ÑÐ¸Ð·Ð¸ÑÐµÑÐºÐ¾Ð¹ ÑÐ¸Ð¼Ð¸Ð¸Â» ÑÐ¾Ð¾ÑÐ²ÐµÑÑÑÐ²ÑÐµÑ Ð¾Ð±ÑÐ°Ð·Ð¾Ð²Ð°ÑÐµÐ»ÑÐ½Ð¾Ð¼Ñ ÑÑÐ°Ð½Ð´Ð°ÑÑÑ ÐÐÐ Ð´Ð¸ÑÑÐ¸Ð¿Ð»Ð¸Ð½Ñ Â«Ð¤Ð¸Ð·Ð¸ÑÐµÑÐºÐ°Ñ ÑÐ¸Ð¼Ð¸ÑÂ» Ð½Ð°Ð¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸ÑÐ¼ Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÑÐºÐ¾Ð¹ Ð¿Ð¾Ð´Ð³Ð¾ÑÐ¾Ð²ÐºÐ¸ 28.03.01 Â«ÐÐ°Ð½Ð¾ÑÐµÑÐ½Ð¾Ð»Ð¾Ð³Ð¸Ð¸ Ð¸ Ð¼Ð¸ÐºÑÐ¾ÑÐ¸ÑÑÐµÐ¼Ð½Ð°Ñ ÑÐµÑÐ½Ð¸ÐºÐ°Â», 22.03.01 Â«ÐÐ°ÑÐµÑÐ¸Ð°Ð»Ð¾Ð²ÐµÐ´ÐµÐ½Ð¸Ðµ Ð¸ ÑÐµÑÐ½Ð¾Ð»Ð¾Ð³Ð¸Ð¸ Ð¼Ð°ÑÐµÑÐ¸Ð°Ð»Ð¾Ð²Â», 22.03.02 Â«ÐÐµÑÐ°Ð»Ð»ÑÑÐ³Ð¸ÑÂ». Ð£ÑÐµÐ±Ð½Ð¾Ðµ Ð¿Ð¾ÑÐ¾Ð±Ð¸Ðµ Â«ÐÑÐ°ÐºÑÐ¸ÐºÑÐ¼ Ð¿Ð¾ ÑÐ¸Ð·Ð¸ÑÐµÑÐºÐ¾Ð¹ ÑÐ¸Ð¼Ð¸Ð¸Â» ÑÐ²Ð»ÑÐµÑÑÑ Ð¿ÑÐ°ÐºÑÐ¸ÑÐµÑÐºÐ¸Ð¼ ÑÑÐºÐ¾Ð²Ð¾Ð´ÑÑÐ²Ð¾Ð¼ Ð¿Ð¾ Ð²ÑÐ¿Ð¾Ð»Ð½ÐµÐ½Ð¸Ñ Ð»Ð°Ð±Ð¾ÑÐ°ÑÐ¾ÑÐ½ÑÑ ÑÐ°Ð±Ð¾Ñ Ð¿Ð¾ ÐºÑÑÑÑ Â«Ð¤Ð¸Ð·Ð¸ÑÐµÑÐºÐ°Ñ ÑÐ¸Ð¼Ð¸ÑÂ». Ð Ð°ÑÑÐ¼Ð¾ÑÑÐµÐ½Ñ Ð»Ð°Ð±Ð¾ÑÐ°ÑÐ¾ÑÐ½ÑÐµ Ð¿Ð¾ Ð¾ÑÐ½Ð¾Ð²Ð½ÑÐ¼ ÑÐ°Ð·Ð´ÐµÐ»Ð°Ð¼ ÐºÑÑÑÐ° ÑÐ¸Ð·Ð¸ÑÐµÑÐºÐ¾Ð¹ ÑÐ¸Ð¼Ð¸Ð¸: ÑÐ¸Ð¼Ð¸ÑÐµÑÐºÐ¾Ð¹ ÑÐµÑÐ¼Ð¾Ð´Ð¸Ð½Ð°Ð¼Ð¸ÐºÐµ Ð¸ ÑÐ¸Ð¼Ð¸ÑÐµÑÐºÐ¾Ð¹ ÐºÐ¸Ð½ÐµÑÐ¸ÐºÐµ. ÐÐ°Ð¶Ð´Ð¾Ð¹ Ð³ÑÑÐ¿Ð¿Ðµ ÑÐ°Ð±Ð¾Ñ Ð¿ÑÐµÐ´Ð¿Ð¸ÑÐ°Ð½Ð¾ ÐºÑÐ°ÑÐºÐ¾Ðµ ÑÐµÐ¾ÑÐµÑÐ¸ÑÐµÑÐºÐ¾Ðµ Ð²Ð²ÐµÐ´ÐµÐ½Ð¸Ðµ, Ð½ÐµÐ¾Ð±ÑÐ¾Ð´Ð¸Ð¼Ð¾Ðµ Ð´Ð»Ñ ÑÐ°Ð¼Ð¾ÑÑÐ¾ÑÑÐµÐ»ÑÐ½Ð¾Ð¹ Ð¿Ð¾Ð´Ð³Ð¾ÑÐ¾Ð²ÐºÐ¸ ÑÑÑÐ´ÐµÐ½ÑÐ¾Ð² Ðº ÑÐºÑÐ¿ÐµÑÐ¸Ð¼ÐµÐ½ÑÑ, Ð¿Ð¾Ð´ÑÐ¾Ð±Ð½Ð¾ Ð¾Ð¿Ð¸ÑÐ°Ð½Ð° Ð¼ÐµÑÐ¾Ð´Ð¸ÐºÐ° Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½Ð¸Ñ ÑÐºÑÐ¿ÐµÑÐ¸Ð¼ÐµÐ½ÑÐ° Ð¸ Ð¿ÑÐ¸Ð½ÑÐ¸Ð¿Ñ Ð¾Ð±ÑÐ°Ð±Ð¾ÑÐºÐ¸ ÐµÐ³Ð¾ ÑÐµÐ·ÑÐ»ÑÑÐ°ÑÐ¾Ð². ÐÐµÑÐµÐ´ Ð²ÑÐ¿Ð¾Ð»Ð½ÐµÐ½Ð¸ÐµÐ¼ ÑÐºÑÐ¿ÐµÑÐ¸Ð¼ÐµÐ½ÑÐ°Ð»ÑÐ½Ð¾Ð¹ ÑÐ°ÑÑÐ¸ ÑÐ°Ð±Ð¾ÑÑ ÑÑÑÐ´ÐµÐ½Ñ Ð¾Ð±ÑÐ·Ð°Ð½ ÑÐ´Ð°ÑÑ ÐºÐ¾Ð»Ð»Ð¾ÐºÐ²Ð¸ÑÐ¼ Ð¿Ð¾ Ð·Ð°Ð´Ð°Ð½Ð½Ð¾Ð¹ ÑÐµÐ¼Ðµ. ÐÐ¾ÑÐ»Ðµ Ð´Ð¾Ð¿ÑÑÐºÐ° Ðº ÑÐºÑÐ¿ÐµÑÐ¸Ð¼ÐµÐ½ÑÐ°Ð»ÑÐ½Ð¾Ð¹ ÑÐ°ÑÑÐ¸ ÑÑÑÐ´ÐµÐ½Ñ Ð¸Ð½Ð´Ð¸Ð²Ð¸Ð´ÑÐ°Ð»ÑÐ½Ð¾ Ð²ÑÐ¿Ð¾Ð»Ð½ÑÐµÑ Ð¾Ð´Ð½Ñ Ð¸Ð· Ð»Ð°Ð±Ð¾ÑÐ°ÑÐ¾ÑÐ½ÑÑ ÑÐ°Ð±Ð¾Ñ Ð¿Ð¾ ÑÐ¾Ð¾ÑÐ²ÐµÑÑÑÐ²ÑÑÑÐµÐ¹ ÑÐµÐ¼Ðµ.
Development of formulation and technology of fermented dairy beverage for musculoskeletal disease prevention
Creators: name: Hurda, M.
name: Lepeshkin, A.
name: Iakovchenko, N.
Publisher: name: Agronomy Research
Year: 2019
Subjects: musculoskeletal disease prevention
curcumin
grape seed oil
emulsion
article

description: According to the data of World Health Organization, 20–33% of people across the world suffer from painful musculoskeletal conditions, which lead to restricted mobility, dexterity and functional mobility. The aim of the research was to develop formulation and technology of yogurt for prevention of musculoskeletal disease. The results of sensory characteristics, physicochemical parameters, rheological characteristics, fatty acid composition have shown that it is possible to create the new product with curcumin, grape seed oil, hyaluronic acid and chondroitin sulfate, which are recommended to use for improving various symptoms of musculoskeletal disease. However, the chosen components increase the manufacturing process. It was observed that fermentation time increase was caused by addition of curcumin, which inhibits the lactic acid bacteria growth within 2.5–3 h. The combination Tween 80 and lecithin allows to obtain stable product during the storage period.
Ecco i getti che prosciugano le galassie
Creators: Eleonora Ferroni
Publisher: name: Media Inaf
Year: 2014

I buchi neri supermassicci generano enormi getti di idrogeno molecolare che portano all'espulsione di enormi quantità di materiale. Un gruppo internazionale di ricercatori ha scoperto come vengono accelerati questi deflussi
LBM and SPH Scalability Using Task-based Programming
Creators: name: Meyer, Jan Christian
name: Arslan, Tufan
name: Jorgen Valstad
name: Janusa Ragunathan
name: Brown, Nick
name: Cebamanos, Luis
Publisher: name: Zenodo
Year: 2019
Subjects: proxy application
LBM
SPH
SMP workload

description: Computational Fluid Dynamics encompasses a great variety of numerical approaches that approximate solutions to the

Navier-Stokes equations, which generally describe the movements of viscous

uid substances. While the objectives of these

approaches are to capture related physical phenomena, the details of di erent methods lend them to particular classes of

problems, and scalable solutions are important to a large range of scienti c and engineering applications. In this paper,

we investigate the practical scalability of two proxy applications that are made to recreate the essential performance

characteristics of Lattice-Boltzmann Methods (LBM) and Smoothed Particle Hydrodyamics (SPH), using the former to

simulate the formation of vortices resulting from sustained, laminar ow, and the latter to simulate violent free surface ows without a mesh. The di ering scalability properties of these methods suggest di erent designs and programming

methods in order to exploit extreme scale computing platforms. In particular, we investigate implementations that enable

the use of task-based programming constructs, which have received attention in recent years as a means of enabling

improved parallel scalability by relaxing the synchronization requirements of classical, bulk-synchronous execution that

both LBM and SPH simulations exemplify. We nd that suitable adaptations of the central data structures suggest that

scalable LBM performance can be improved by tasking constructs in situations that are determined by an appropriate

match between the input problem and the platform's performance characteristics. This suggests an adaptive scheme to

identify and select the highest performing implementation at program initialization. The SPH implementation admits a

substantial performance gain by partitioning the physical domain into a greater number of independent tasks than the

number of participating processors, but its performance remains dependent on a powerful node architecture to support

conventional SMP workloads, suggesting that further algorithmic improvements beyond the bene ts of task programming

are required to make it a strong candidate for exascale computing.
Bilayer Graphene Interferometry : Phase Jump and Wave Collimation
Creators: name: Park, Sunghun
name: Sim, H. -S.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We theoretically study the phase of the reflection amplitude of an electron (massive Dirac fermion) at a lateral potential step in Bernal-stacked bilayer graphene. The phase shows anomalous jump of $π$, as the electron incidence angle (relative to the normal direction to the step) varies to pass $\pm π/4$. The jump is attributed to the Berry phase associated with the pseudospin-1/2 of the electron. This Berry-phase effect is robust against the band gap opening due to the external electric gates generating the step. We propose an interferometry setup in which collimated waves can be generated and tuned. By using the setup, one can identify both the $π$ jump and the collimation angle.
description: 4 pages, 6 figures
Primi attori sulla scena del Cosmo
Creators: Corrado Lamberti
Publisher: name: Media Inaf
Year: 2014

Il libro di Alessandro Marconi esce nella collana “Farsi un’idea” della Società editrice il Mulino. Ebbene, chi non si accontenterà di darne una scorsa veloce, ma farà il giusto sforzo che il testo richiede per seguire le argomentazioni dell’autore, ben più che semplicemente “farsi un’idea” potrà invece maturare una buona conoscenza del comportamento dei buchi neri e del loro ruolo nell’evoluzione delle galassie
Dynamical heterogeneity in a model for permanent gels: Different behavior of dynamical susceptibilities
Creators: name: Abete, T.
name: de Candia, A.
name: Del Gado, E.
name: Fierro, A.
name: Coniglio, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We present a systematic study of dynamical heterogeneity in a model for permanent gels, upon approaching the gelation threshold. We find that the fluctuations of the self intermediate scattering function are increasing functions of time, reaching a plateau whose value, at large length scales, coincides with the mean cluster size and diverges at the percolation threshold. Another measure of dynamical heterogeneities, i.e. the fluctuations of the self-overlap, displays instead a peak and decays to zero at long times. The peak, however, also scales as the mean cluster size. Arguments are given for this difference in the long time behavior. We also find that non-Gaussian parameter reaches a plateau in the long time limit. The value of the plateau of the non-Gaussian parameter, which is connected to the fluctuations of diffusivity of clusters, increases with the volume fraction and remains finite at percolation threshold.
description: 11 pages, 14 figures
Additional file 1: of Area of the cone interdigitation zone in healthy Chinese adults and its correlation with macular volume
Creators: name: Gu, Ruiping
name: Deng, Guohua
name: Jiang, Yi
name: Jiang, Chunhui
name: Xu, Gezhi
Publisher: name: figshare
Year: 2018
Subjects: subject: Medicine
subject: Chemical Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: Figure S1. Schematic diagrams of the mean cone interdigitation zone area and length in 12 directions. The outer ring is 15 ° from the central fovea. IZ = interdigitation zone; I = inferior; INL = inferior nasal lower; INU = inferior nasal upper; ITL = inferior temporal lower, ITU: inferior temporal upper, N = nasal; S = superior; SNL: superior nasal lower; SNU = superior nasal upper; STL = superior temporal lower; STU: superior temporal upper; T = temporal. Figure S2. Bland–Altman plots of the repeatability and reproducibility of the IZ area measurements. IZ = interdigitation zone; SD = standard deviation. Table S1. Clinical characteristics of the subjects and eyes. Table S2. Cone interdigitation area and lengths in 12 directions of the left and right eyes. Table S3. Binocular symmetry of the interdigitation zone areas and lengths in 12 directions. (DOCX 1801 kb)
Magnetization Plateaux in the Antiferromagnetic Ising Chain with Single-Ion Anisotropy
Creators: name: Litaiff, Fabian
name: de Sousa, J. Ricardo
name: Branco, N. S.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Two one-dimensional spin-1 antiferromagnetic Ising models with a single-ion anisotropy under external magnetic field at low temperatures are exactly investigated by the transfer-matrix technique. The magnetization per spin ($m$) is obtained for the two types of models (denoted by model 1 and 2) as an explicit function of the magnetic field ($H$%) and of the anisotropy parameter ($D$). Model 1 is an extension of the recently one treated by Ohanyan and Ananikian [\emph{Phys. Lett. A} \textbf{% 307} (2003) 76]: we have generalized their model to the spin-1 case and a single-ion anisotropy term have been included. In the limit of positive (or null) anisotropy ($D\geq 0$) and strong antiferromagnetic coupling ($α=J_{A}/J_{F}\geq 3$) the $m \times H$ curves are qualitatively the same as for the spin $S=1/2$ case, with the presence of only one plateau at $m/m_{sat}=1/3$. On the other hand, for negative anisotropy ($D<0$) we observe more plateaux ($m=1/6$ and 2/3), which depend on the values of $D$ and $% α$. The second model (model 2) is the same as the one recently studied by Chen et al. [\emph{J. Mag. Mag. Mat. }\textbf{262} (2003) 258)] using Monte Carlo simulation; here, the model is treated within an exact transfer-matrix framework.
description: 9 pages
Pan-STARRS sfila sulla galassia
Creators: Stefano Parisini
Publisher: name: Media Inaf
Year: 2014

Il satellite NEOWISE della NASA ha catturato una serie di immagini in infrarosso della cometa C/2012 K1, nota anche come Pan-STARRS, mentre attraversava i nostri cieli nello scorso maggio. Sullo sfondo, 2 trilioni di volte più lontana, la galassia spirale NGC 3726
title: Ð¥Ð¸Ð¼Ð¸Ñ. Ð Ð°ÑÑÐ²Ð¾ÑÑ ÑÐ»ÐµÐºÑÑÐ¾Ð»Ð¸ÑÐ¾Ð²
title: ÑÑÐµÐ±Ð½Ð¾Ðµ Ð¿Ð¾ÑÐ¾Ð±Ð¸Ðµ
titleType: Subtitle
Creators: name: Ð¢Ð°Ð½ÑÑÑÐ°, ÐÐ°Ð´ÐµÐ¶Ð´Ð°
name: ÐÐ¾ÑÐµÐ»Ð¾Ð²Ð°, ÐÐ»Ð»Ð°
name: ÐÐ¾ÑÐ°Ð³Ð¸Ð½Ð°, ÐÐ»ÐµÐ½Ð°
Publisher: name: ÐÐ·Ð´-Ð²Ð¾ ÐÐ¾Ð»Ð¸ÑÐµÑÐ½. ÑÐ½-ÑÐ°
Year: 2009
Subjects: Ð¥Ð¸Ð¼Ð¸Ñ
Ð­Ð»ÐµÐºÑÑÐ¾Ð»Ð¸ÑÑ

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description: ÐÐµÑÐ°ÑÐ°ÐµÑÑÑ Ð¿Ð¾ ÑÐµÑÐµÐ½Ð¸Ñ ÑÐµÐ´Ð°ÐºÑÐ¸Ð¾Ð½Ð½Ð¾-Ð¸Ð·Ð´Ð°ÑÐµÐ»ÑÑÐºÐ¾Ð³Ð¾ ÑÐ¾Ð²ÐµÑÐ° Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¾Ð³Ð¾ Ð³Ð¾ÑÑÐ´Ð°ÑÑÑÐ²ÐµÐ½Ð½Ð¾Ð³Ð¾ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¾Ð³Ð¾ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑÐ°.
Piccole, numerose e ionizzanti
Creators: Marco Galliani
Publisher: name: Media Inaf
Year: 2014

Sono state le galassie piccole e poco luminose, con la loro radiazione ultravioletta, le protagoniste del processo di reionizzazione che ha reso ‘trasparente’ l’universo nelle prime fasi della sua evoluzione. Questi i risultati di una nuova simulazione al calcolatore guidata da ricercatori del Georgia Institute of Technology negli USA. Il commento di Eros Vanzella (INAF)
Ringed spherulitic and undulated textures in the nematic phase of a mixture of trans-4-hexylcyclohexanecarboxylic and benzoic acids
Creators: name: Sparavigna, Amelia Carolina
Publisher: name: arXiv
Year: 2009
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We present a polarising optical microscopy study of a liquid-crystal mixture of trans-4-hexylcyclohexanecarboxylic acid (C6) and benzoic acid. Both materials have carboxylic groups that can form dimers through hydrogen bonding. The mixture is nematic and room temperature and has the clearing point at 88 Celsius. The nematic phase shows ringed spherulites, sometimes looking like spiral structures, and undulated textures, which remain visible heating the sample till 71 Celsius. This is the temperature of a texture transition inside the nematic phase.
Più grande e più potente che pria
Creators: Eleonora Ferroni
Publisher: name: Media Inaf
Year: 2014

Il colosso verrà lanciato nel 2017 e il primo "ospite" sarà la capsula Orion. Misura 117 metri e potrà trasportare fino a 143 tonnellate di carico. Sarà sicuramente molto utile in future missioni di rifornimenti e trasporto di esperimenti nello spazio
title: Synthetic Generation of Dynamic Omics Data Demonstrates Aspergillus nidulans BrlA Paradoxical Wall Stress Response
Creators: name: Zavorskas, Joseph
name: Edwards, Harley
name: Huso, Walker
name: Doan, Alexander G.
name: Marten, Mark
name: Harris, Steven
name: Srivastava, Ranjan
Publisher: name: Maryland Shared Open Access Repository
Year: 2025

description: We propose a method to generate additional dynamic omics trajectories which could support pathway analysis methods such as enrichment analysis, genetic programming, and machine learning. Using long short-term memory neural networks, we can effectively predict an organism’s dynamic response to a stimulus based on an initial dataset with relatively few samples. We present both an in silico proof of principle, based on a model that simulates viral propagation, and an in vitro case study, tracking the dynamics of Aspergillus nidulans’ BrlA transcript in response to antifungal agent micafungin. Our silico experiment was conducted using a highly noisy dataset with only 25 replicates. This proof of principle shows that this method can operate on biological datasets, which often have high variance and few replicates. Our in silico validation achieved a maximum R2 value of approximately 0.95 on our highly noisy, stochastically simulated data. Our in vitro validation achieves an R2 of 0.71. As with any machine learning application, this method will work better with more data; however, both of our applications attain acceptable validation metrics with very few biological replicates. The in vitro experiments also revealed a novel paradoxical dose-response effect: transcriptional upregulation by Aspergillus nidulans BrlA is highest at an intermediate dose of 10 ng/mL and is reduced at both higher and lower concentrations of micafungin.
Thermoelectrically Controlled Spin-Switch
Creators: name: Andersson, S.
name: Korenivski, V.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The search for novel spintronic devices brings about new ways to control switching in magnetic thin-films. In this work we experimentally demonstrate a device based on thermoelectrically controlled exchange coupling. The read out signal from a giant magnetoresistance element is controlled by exchange coupling through a weakly ferromagnetic Ni-Cu alloy. This exchange coupling is shown to vary strongly with changes in temperature, and both internal Joule heating and external heating is used to demonstrate magnetic switching. The device shows no degradation upon thermal cycling. Ways to further optimize the device performance are discussed. Our experimental results show a new way to thermoelectrically control magnetic switching in multilayers.
description: 4 pages, 4 figures
Distillability sudden death in qutrit-qutrit systems under global decoherence
Creators: name: Ali, Mazhar
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Recently Song {\it et al}., Phys. Rev. A {\bf 80}, 012331 (2009), have discovered that certain two-qutrit entangled states interacting with multi-local decoherence undergo distillability sudden death whereas their locally equivalent states do not exhibit such behavior. We have found that their basic equation of motion missed some terms and therefore the subsequent calculations and conclusions are not correct/valid except that distillability sudden death may occur. We provide the missing terms and point out the corrections which must be done in the literature to remove confusion. Moreover, we have studied this feature for certain entangled states under global, collective and multi-local decoherence. We have found that entanglement sudden death and distillability sudden death may happen under global and multi-local noises. Moreover, local unitary transformations can not avoid distillability sudden death.
description: 6 pages, 6 Figures
Como faciliar a Aprendizagem Significativa e Rigorosa da Física - Slides
Creators: name: Valadares, Jorge
Publisher: name: Zenodo
Year: 2004
Subjects: Aprendizagem
Física

description: Conferência plenária no XVI SNEF – Simpósio Nacional de Ensino de Física, organizado pela Sociedade Brasileira de Física - 2005
Fascia di abitabilità anche per i sistemi binari
Creators: Davide Coero Borga
Publisher: name: Media Inaf
Year: 2014

Si chiama OGLE-2013-BLG-0341LBb, si trova a 3.000 anni luce da qui ed è freddissimo. Ma è anche il primo esopianeta potenzialmente abitabile a viaggiare sull’orbita di un sistema binario: una scoperta che ampia gli orizzonti di ricerca per pianeti di tipo terrestre al di fuori del Sistema solare
Ambiente em sala de aula facilitador da aprendizagem significativa da Física- Slides
Creators: name: Valadares, Jorge
Publisher: name: Zenodo
Year: 2004
Subjects: Aprendizagem
Física

description: Conferência plenária no XVI SNEF – Simpósio Nacional de Ensino de Física, organizado pela Sociedade Brasileira de Física - 2005
Pour toute surface hyperbolique de genre $g$, $λ_{2g-2}>\frac 14}$
Creators: name: Otal, Jean-Pierre
name: Rosas, Eulalio
Publisher: name: arXiv
Year: 2009
Subjects: subject: Differential Geometry (math.DG)
subject: Spectral Theory (math.SP)
subject: FOS: Mathematics

description: We show that for any hyperbolic surface of genus g, the eigenvalue $λ_{2g-2}$ of the Laplace operator is > 1/4.
description: The final version of this article will be published in the Duke Mathematical Journal
E’ il serpentino che scurisce Vesta?
Creators: Marco Galliani
Publisher: name: Media Inaf
Year: 2014

Secondo un'indagine guidata da scienziati del  Max Planck Institute for Solar System Research, sarebbero stati gli impatti con piccoli asteroidi ricchi di carbonio a creare le zone di materiale scuro sulla superficie dell'asteroide Vesta individuati dalla sonda DAWN. I commenti dei ricercatori INAF Andrea Longobardo e Maria Cristina De Sanctis
Transverse Spin Effects at COMPASS
Creators: name: Wollny, H.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Single spin asymmetries in semi-inclusive deep-inelastic scattering off transversely polarized nucleon targets have been under intense experimental investigation over the past few years. They provide new insights into QCD and the nucleon structure. For instance, they allow the determination of the third yet-unknown leading-twist quark distribution function $Δ_{T}q(x)$, the transversity distribution. Additionally, they give insight into the parton transverse momentum distribution and angular momentum. The measurement of transverse spin effects in semi-inclusive deep-inelastic scattering is an important part of the COMPASS physics program. In the years 2002-2004 data were collected scattering a 160 GeV muon beam on a transversely polarized deuteron target. In 2007, additional data were collected on a transversely polarized proton target. New results from the analysis of the proton data will be presented. A different but not less important insight into the nucleon structure might be given by the Sivers asymmetry. This angular dependence of the cross-section arises from an intrinsic asymmetry in the parton transverse momentum distribution. The Sivers function is tightly related to the total angular momentum carried by the quarks in the nucleon. New COMPASS results for the Sivers asymmetry of the proton will be shown.
description: proceeding of SPIN 2008, Charlottesville Virginia
Regge-plus-resonance predictions for kaon photoproduction from the neutron
Creators: name: Vancraeyveld, P.
name: De Cruz, L.
name: Ryckebusch, J.
name: Van Cauteren, T.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present predictions for n(gamma,K+)Sigma- differential cross sections and photon-beam asymmetries and compare them to recent LEPS data. We adapt a Regge-plus-resonance (RPR) model developed to describe photoinduced and electroinduced kaon production off protons. The non-resonant contributions to the amplitude are modelled in terms of K+(494) and K*+(892) Regge-trajectory exchange. This amplitude is supplemented with a selection of s-channel resonance diagrams. The three Regge-model parameters of the n(gamma,K+)Sigma- amplitude are derived from the ones fitted to proton data through SU(2) isospin considerations. A fair description of the n(gamma,K+)Sigma- data is realized, which demonstrates the Regge model's robustness and predictive power. Conversion of the resonances' couplings from the proton to the neutron is more challenging, as it requires knowledge of the photocoupling helicity amplitudes. We illustrate how the uncertainties of the helicity amplitudes propagate and heavily restrain the predictive power of the RPR and isobar models for kaon production off neutron targets.
description: 14 pages, 4 figures; Minor revisions; Published in Physics Letters B
Exchange coupling and magnetoresistance in CoFe/NiCu/CoFe spin-valves near the Curie point of the spacer
Creators: name: Andersson, S.
name: Korenivski, V.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Thermal control of exchange coupling between two strongly ferromagnetic layers through a weakly ferromagnetic Ni-Cu spacer and the associated magnetoresistance is investigated. The spacer, having a Curie point slightly above room temperature, can be cycled between its paramagnetic and ferromagnetic states by varying the temperature externally or using joule heating. It is shown that the giant magnetoresistance vanishes due to a strong reduction of the mean free path in the spacer at above ~30 % Ni concentration -- before the onset of ferromagnetism. Finally, a device is proposed and demonstrated which combines thermally controlled exchange coupling and large magnetoresistance by separating the switching and the read out elements.
description: 4 pages, 4 figures
The multiplicative domain in quantum error correction
Creators: name: Choi, Man-Duen
name: Johnston, Nathaniel
name: Kribs, David W.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We show that the multiplicative domain of a completely positive map yields a new class of quantum error correcting codes. In the case of a unital quantum channel, these are precisely the codes that do not require a measurement as part of the recovery process, the so-called unitarily correctable codes. Whereas in the arbitrary, not necessarily unital case they form a proper subset of unitarily correctable codes that can be computed from properties of the channel. As part of the analysis we derive a representation theoretic characterization of subsystem codes. We also present a number of illustrative examples.
description: 17 pages, preprint version
A sampling-type function generator and four-quadrant analog multiplier
Creators: name: Hildebrand, Bernard Percy
Publisher: name: University of British Columbia
Year: 2012

description: This thesis describes the design and development of a sampling-type function generator and a four-quadrant analog multiplier. The project is divided into two parts, the general arrangement and circuitry of the function generator and multiplier, and the timing circuits which actuate them. This thesis is concerned with the general circuitry. The functions to be generated are photographed on 35 mm. film and mounted in standard frames which are then fastened to the rim of a rotating disk. An optical system is used to scan the functions in a time-sequential manner. A timing system selects the required abscissa and actuates a combination of electronic gates and clamping circuits which stores the voltage, Eք, representing the ordinate, and the voltage, Eм, representing the maximum of the function. These two stored voltages, Eք and Eм, are applied to separate sweep circuits which produce sweep outputs of EքN(t) and EмN(t) respectively. A system of comparator circuits and gates samples the EքN(t) at the instant a reference voltage, E, equals the sweep EмN(t). Since the sweeps, N(t) are identical, the value of EքN(t) at the instant of sampling is (formula not included). This sequence of operations occurs for each function as it is scanned. Each successive multiplication is stored in its own storage unit. All the circuits are designed to be self-calibrating to minimize error due to drift.