Research into oil film coating of a steel pipe interior by oil mist blowing

Corrosion protection is one of the most frequently addressed issues in metallurgic and engineering applications. Oil film coating of inaccessible areas such as interior of a steel pipe is technically complicated. Because of that, the choice of the interior pipe film coating via oil mist is a viable solution. However, it is necessary to establish what will be the composition of the oil layer and what distance the required oil thickness will span. These are the aspects dealt with in the present paper

Research into oil film coating of a steel pipe interior by oil mist blowing

Corrosion protection is one of the most frequently addressed issues in metallurgic and engineering applications. Oil film coating of inaccessible areas such as interior of a steel pipe is technically complicated. Because of that, the choice of the interior pipe film coating via oil mist is a viable solution. However, it is necessary to establish what will be the composition of the oil layer and what distance the required oil thickness will span. These are the aspects dealt with in the present paper

Collins and Sivers transverse-spin asymmetries in inclusive muoproduction of ρ0\rho^0 mesons

The production of vector mesons in deep inelastic scattering is an interesting yet scarsely explored channel to study the transverse spin structure of the nucleon and the related phenomena. The COMPASS collaboration has performed the first measurement of the Collins and Sivers asymmetries for inclusively produced $\rho^0$ mesons. The analysis is based on the data set collected in deep inelastic scattering in $2010$ using a $160\,\,\rm{GeV}/c$ $\mu^+$ beam impinging on a transversely polarized $\rm{NH}_3$ target. The $\rho^{0}$ mesons are selected from oppositely charged hadron pairs, and the asymmetries are extracted as a function of the Bjorken-$x$ variable, the transverse momentum of the pair and the fraction of the energy $z$ carried by the pair. Indications for positive Collins and Sivers asymmetries are observed

Spin Density Matrix Elements in Exclusive ρ0\rho ^0 Meson Muoproduction

We report on a measurement of Spin Density Matrix Elements (SDMEs) in hard exclusive $\rho ^0$ meson muoproduction at COMPASS using 160~GeV/$c$ polarised $\mu ^{+}$ and $\mu ^{-}$ beams impinging on a liquid hydrogen target. The measurement covers the kinematic range 5.0~GeV/$c^2$ $< W <$ 17.0~GeV/$c^2$, 1.0 (GeV/$c$)$^2$ $< Q^2 <$ 10.0 (GeV/$c$)$^2$ and 0.01 (GeV/$c$)$^2$ $< p_{\rm{T}}^2 <$ 0.5 (GeV/$c$)$^2$. Here, $W$ denotes the mass of the final hadronic system, $Q^2$ the virtuality of the exchanged photon, and $p_{\rm{T}}$ the transverse momentum of the $\rho ^0$ meson with respect to the virtual-photon direction. The measured non-zero SDMEs for the transitions of transversely polarised virtual photons to longitudinally polarised vector mesons ($\gamma^*_T \to V^{ }_L$) indicate a violation of $s$-channel helicity conservation. Additionally, we observe a dominant contribution of natural-parity-exchange transitions and a very small contribution of unnatural-parity-exchange transitions, which is compatible with zero within experimental uncertainties. The results provide important input for modelling Generalised Parton Distributions (GPDs). In particular, they may allow one to evaluate in a model-dependent way the role of parton helicity-flip GPDs in exclusive $\rho ^0$ production

Corrigendum to "Transverse extension of partons in the proton probed in the sea-quark range by measuring the DVCS cross section" [Phys. Lett. B 793 (2019) 188]

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Measurement of P T -weighted Sivers asymmetries in leptoproduction of hadrons

The transverse spin asymmetries measured in semi-inclusive leptoproduction of hadrons, when weighted with the hadron transverse momentum PT , allow for the extraction of important transverse-momentumdependent distribution functions. In particular, the weighted Sivers asymmetries provide direct information on the Sivers function, which is a leading-twist distribution that arises from a correlation between the transverse momentum of an unpolarised quark in a transversely polarised nucleon and the spin of the nucleon. Using the high-statistics data collected by the COMPASS Collaboration in 2010 with a transversely polarised proton target, we have evaluated two types of PT -weighted Sivers asymmetries, which are both proportional to the product of the first transverse moment of the Sivers function and of the fragmentation function. The results are compared to the standard unweighted Sivers asymmetries and used to extract the first transverse moments of the Sivers distributions for u and d quark

Reception of the personality and creativity of L, N. Tolstoy in the Czech Republic

ского наследия чехами на протяжении нескольких эпох (ХIХ-ХХI вв.). Для реализации намеченной цели изуче- ны связи Толстого с чехами и словаками (Т. Г. Масариком, Д. П. Маковицким, К. Велеминским, П. Шакваном), переводы на чешский язык произведений автора, отзывы на творчество мыслителя литературных критиков (В. Мрштик, Ф. Шалда), отклики на педагогическую деятельность писателей (О. Баржезина), композиторов (Л. Яначека), журналистов (Н. В. Моравского, Р. Валенчика) и педагога (Я. Мразик). Авторы приходят к вы- воду: несмотря на то, что со дня рождения великого русского писателя прошло уже 190 лет и в Чехии ему не довелось побывать, интерес к его личности среди чешских исследователей только усиливается

Diagnostika professional´no-psichologičeskoj gotovnosti rossijskich pedagogov k realizacii inkljuzivnogo obrazovanija

Stat´ja posvjaščena probleme gotovnosti pedagogov k realizacii inkljuzivnogo obrazovanija. Akcent sdelan na diagnostike professional´no-psichologičeskich osobennostej pedagogov k realizacii inkljuzivnogo obrazovanija. V anketirovanii prinjali učastie 277 čelovek iz Rossii. Srednij pedagogičeskij staž oprošennych pedagogov sostavil 10,3 goda. Issledovanie osuščestvljalos´ s ispol´zovaniem anket: Anketa dlja vyjavlenija samoocenki professional´nych kompetencij učitelja; Anketa dlja samoocenki otdel´nych vidov kompetencii učitelja v rabote s učenikami so special´nymi obrazovatel´nymi potrebnostjami. Sravnenie respondentov osuščestvljalos´ po parametru - staž pedagogičeskoj dejatel´nosti. U bol´šinstva učitelej praktičeski vse professional´nye kompetencii, neobchodimye pri rabote s učaščimisja s osobymi obrazovatel´nymi potrebnostjami, ocenivajutsja ispytuemymi na dostatočno vysokom urovne. Sravnitel´nyj analiz polučennych dannych pokazyvaet naličie statističeski značimych različij v raspredelenii otvetov u pedagogov s raznym stažem professional´noj dejatel´nosti po bloku psichologo-pedagogičeskich kompetencij. Statističeskij analiz pokazal, čto molodye specialisty lučše osvedomleny o psichologo-pedagogičeskich osnovach inkljuzivnogo obrazovanija. Rezul´taty issledovanija pokazali, čto učitelja v bol´šinstve svoem otnosjatsja položitel´no k samoj rabote v uslovijach inkljuzivnogo obrazovanija. Pri ètom osoznajut, čto u nich nedostatočno professional´nych i psichologo-pedagogičeskich kompetencij k rabote s det´mi s osobymi obrazovatel´nymi potrebnostjami v uslovijach inkljuzii

Research into oil film coating of a steel pipe interior by oil mist blowing

Corrosion protection is one of the most frequently addressed issues in metallurgic and engineering applications. Oil film coating of inaccessible areas such as interior of a steel pipe is technically complicated. Because of that, the choice of the interior pipe film coating via oil mist is a viable solution. However, it is necessary to establish what will be the composition of the oil layer and what distance the required oil thickness will span. These are the aspects dealt with in the present paper

Diel timing of nest predation changes across breeding season in a subtropical shorebird

Abstract Predation is the most common cause of nest failure in birds. While nest predation is relatively well studied in general, our knowledge is unevenly distributed across the globe and taxa, with, for example, limited information on shorebirds breeding in subtropics. Importantly, we know fairly little about the timing of predation within a day. Here, we followed 444 nests of the red‐wattled lapwing (Vanellus indicus), a ground‐nesting shorebird, for a sum of 7,828 days to estimate a nest predation rate, and continuously monitored 230 of these nests for a sum of 2,779 days to reveal how the timing of predation changes over the day and season in a subtropical desert. We found that 312 nests (70%) hatched, 76 nests (17%) were predated, 23 (5%) failed for other reasons, and 33 (7%) had an unknown fate. Daily predation rate was 0.95% (95%CrI: 0.76% – 1.19%), which for a 30‐day long incubation period translates into ~25% (20% – 30%) chance of nest being predated. Such a predation rate is low compared to most other avian species. Predation events (N = 25) were evenly distributed across day and night, with a tendency for increased predation around sunrise, and evenly distributed also across the season, although night predation was more common later in the season, perhaps because predators reduce their activity during daylight to avoid extreme heat. Indeed, nests were never predated when midday ground temperatures exceeded 45℃. Whether the diel activity pattern of resident predators undeniably changes across the breeding season and whether the described predation patterns hold for other populations, species, and geographical regions await future investigations