Cyclic variations of the structure and energetics of solar magnetic fields

The solar cycle is a complex phenomenon, a comprehensive understanding of which requires the study of various tracers. Here, we consider the solar cycle as manifested in the harmonics of the solar large-scale surface magnetic field, including zonal, sectorial and tesseral harmonics, divided into odd and even relative to the solar equator. In addition to considering the amplitudes of the harmonics, we analyze their contribution to the magnetic energy. It turns out that the relative contribution of different types of harmonics to the magnetic energy is virtually independent of the cycle height. We identify different phases of the activity cycle using harmonics of different symmetries. A possible way to incorporate the obtained result into the solar dynamo theory is proposed.Comment: 8 pages, 7 figure

Study on the Course of Cryptosporidium baileyi infection in chickens treated with interleukin-1 or indomethacin

The effects exerted by human recombinant interleukin-1β (hrIL-1β) and the prostaglandin inhibitor indomethacin on the course of Cryptosporidium baileyi infection in chickens were studied. Daily oocyst shedding was monitored by a quantitative method throughout the experiment. Humoral immune response to C. baileyi was assessed by ELISA at 3 weeks of age while the level of cellular immune response to phytohaemagglutinin-P (PHA-P) by a skin test at 23 days of age. Parenteral application of hrIL-1b decreased oocyst shedding to 62%, but the infection ran a similar course in treated and control birds. The PHA-P skin test demonstrated increased cellular immune reaction in chickens receiving IL-1b, but there was no significant difference in the humoral responses of the two groups as detected by ELISA. On the other hand, indomethacin mixed to the feed lessened oocyst shedding to 13.7% and also shortened its duration. Immunological parameters as reflected by PHA-P skin test and ELISA results indicated enhanced cellular but unaltered humoral immune response. These data suggest that the sys- temic application of interleukin-1 can induce partial protection against C. baileyi in chickens and that prolonged, abundant oocyst shedding is due to an indometha- cin-sensitive immunodepression via the prostaglandin pathway

Modification of Mechanical Properties in Directed Energy Deposition by a Static Magnetic Field: Experimental and Theoretical Analysis

The superimposed magnetic field affects the microstructure and mechanical properties of additively manufactured metal parts. In this work, the samples were fabricated from Inconel 718 superalloy by directed energy deposition under a 0.2 T static field. The magnetohydrodynamic 1D model is proposed for the estimation of a fluid flow inside a molten pool. According to the theoretical predictions, the fluid flow is slightly decreased by an applied field. The estimated thermoelectric magnetic convection in the mushy zone is shown to be negligible to change in subgrain size, but enough to reduce the hard-to-dissolve Nb-rich phase, thereby improving the average ultimate elongation from 23% to 27%. The obtained results confirm that an external static magnetic field can modify and enhance the mechanical properties of additively manufactured materials

The impact of economic recession on company activities

Negative consequences of economic fluctuations and economic downturns influence the significance of research in this area. Results of such research allow providing insights and sugges¬tions for governments to make political-economic decisions. The article investigates the impact of slowing economy on enterprises, the reasons of fluctuations of economic cycles and their characteristics, phases of economic cycle: growth, peak, downturn and crisis. The article studies definition of slowing economy, its reasons, ratios, and inter-relationship between various ratios. Methodology of evaluating economic cycles is provided in the article. Article in Lithuanian. Lėtėjančios ekonomikos poveikis įmonių veiklai Santrauka  Didėjantys neigiami ekonominių svyravimų ir ekonomikos nuosmukio padariniai nulemia šioje srityje atliekamų tyrimų svarbą. Remiantis tyrimų rezultatais, pateikiamos įžvalgos ir pasiūlymai vyriausybės politiniams – ekonominiams sprendimams priimti. Straipsnyje nagrinėjamas lėtėjančios ekonomikos poveikis įmonėms, išgrynintos pagrindinės ekonomikos ciklų svyravimų priežastys ir jų charakteristikos. Nagrinėjamos ekonominio ciklo fazės: pakilimas, viršūnė, nuosmukis ir krizė. Analizuojama ekonomikos lėtėjimo samprata, priežastys, rodikliai ir įvairių ekonominių rodiklių sąveika. Taip pat pateikiama ekonominių ciklų vertinimo metodika. Reikšminiai žodžiai: ekonominiai ciklai, ciklo fazės, lėtėjimas, pakilimas, krizė, lėtėjimo rodikliai

THE IMPACT OF ECONOMIC RECESSION ON COMPANY ACTIVITIES / LĖTĖJANČIOS EKONOMIKOS POVEIKIS ĮMONIŲ VEIKLAI

Negative consequences of economic fluctuations and economic downturns influence the significance of research in this area. Results of such research allow providing insights and sugges¬tions for governments to make political-economic decisions. The article investigates the impact of slowing economy on enterprises, the reasons of fluctuations of economic cycles and their characteristics, phases of economic cycle: growth, peak, downturn and crisis. The article studies definition of slowing economy, its reasons, ratios, and inter-relationship between various ratios. Methodology of evaluating economic cycles is provided in the article. Santrauka  Didėjantys neigiami ekonominių svyravimų ir ekonomikos nuosmukio padariniai nulemia šioje srityje atliekamų tyrimų svarbą. Remiantis tyrimų rezultatais, pateikiamos įžvalgos ir pasiūlymai vyriausybės politiniams – ekonominiams sprendimams priimti. Straipsnyje nagrinėjamas lėtėjančios ekonomikos poveikis įmonėms, išgrynintos pagrindinės ekonomikos ciklų svyravimų priežastys ir jų charakteristikos. Nagrinėjamos ekonominio ciklo fazės: pakilimas, viršūnė, nuosmukis ir krizė. Analizuojama ekonomikos lėtėjimo samprata, priežastys, rodikliai ir įvairių ekonominių rodiklių sąveika. Taip pat pateikiama ekonominių ciklų vertinimo metodika. Reikšminiai žodžiai: ekonominiai ciklai, ciklo fazės, lėtėjimas, pakilimas, krizė, lėtėjimo rodikliai