Environmental problem in organization of works related to electroplating of parts

Problem statement: Ecological problem in the application of galvanic coatings during the manufacture of electronic equipment for the Navy. The aim of the work is to analyze the applied galvanic coatings in the manufacture of radioelectronic equipment (CEA) and a description of the environmental problem in the organization of work related to the application of galvanic coatings to parts within the city of St. Petersburg. Novelty: consists in a description of the conflict of legislative requirements regarding licensing of hazardous industries and proposals to rectify the situation. The result: it is necessary to allow enterprises located within the city limits to re-equip galvanic production to improve the ecological condition of the city. Practical significance: improving the environmental situation in the city of St. Petersburg

O impacto das medidas de melhoria do abastecimento de água e esgoto sobre a diarréia e parasitose intestinal: experiência brasileira com crianças de comunidades de baixa renda

During the second half of 1986 the impact of the improvement of water supply and excreta disposal facilities on diarrheal diseases and intestinal parasitosis was studied in 254 children up to six years of age from two favelas (shanty towns) of Belo Horizonte, Brazil. The estimated incidence of diarrhea was 6.2 episodes/child year and the estimated period prevalence reached 31.0 episode days/ child/ year. The point prevalence of parasitosis was 70.7% (Ascaris lumbricoides: 55.4%, Trichuris trichiura: 19.6%, Giardia lamblia: 17.9%). The estimated prevalence of diarrhea decreased with improvement of water supply and sanitation facilities to 45% and 44% respectively, but no statistically significant impact was observed in the case of parasitosis. School education and weaning practice were found to be other important determinants of diarrhea.Em 1986 pesquisou-se, junto a 254 crianças de até 6 anos de idade, residentes em duas favelas de Belo Horizonte (Brasil), o impacto das medidas de melhoramento do abastecimento de água e esgoto na incidência de diarréia e parasitose intestinal. Até então, a incidência de diarréia era estimada em 6,2 casos por criança e ano, com uma duração predominante de 31,0 dias por caso/criança/ano. A taxa de difusão de parasitose alcançava 70,7% (Ascaris lumbricoides: 55,4%, Trichuris trichiura: 19,6%; Giardia lamblia: 17,9%). Após os melhoramentos no abastecimento de água e esgoto, a incidência de diarréia caiu para 45% e 44%, respectivamente. Quanto à parasitose, entretanto, não se constatou nenhum impacto estatisticamente significante. Também verificou-se que o grau de educação escolar e práticas de desmame são determinantes de grande importância na incidência de diarréia

Estado nutricional de crianças de comunidades de baixa renda, Brasil, 1986

Foi analisado, em 1986, o estado nutricional e de saúde de 254 crianças de idade inferior a seis anos, procedentes de duas favelas da cidade de Belo Horizonte, Brasil, e estudada a situação sócio-econômica dos seus pais. O estado nutricional das crianças foi caracterizado em função da redução do crescimento (Z-score: 20,1% < -2) e não em função da perda de peso (Z-score: 3,7During the second half of 1986 the health and nutritional status of 254 children aged up to six years was studied, as well as the socio-economic situation of their parents in two favelas (shantytowns) in Belo Horizonte, Brazil. The nutritional status of the children was characterized by stunting (Z-score: 20.1% < -2) but not by wasting (Z-score: 3.7% < -2). Consideration was also given to how far stunting was caused by high morbidity such as acute respiratory infections (point prevalence: 38.5%), diarrheal diseases (point prevalence: 11.5%) and parasitosis (point prevalence: 70.3%). Furthermore, anemia (point prevalence: 29.7%) appeared as another health problem. The most important determinant of anthropometric indices turned out to be the mother's schooling. From the present data it can be hypothesized that the nutritional status of the children was limited less by the lack of food than by their poor health status

Ferromagnetism in Correlated Electron Systems: Generalization of Nagaoka's Theorem

Nagaoka's theorem on ferromagnetism in the Hubbard model with one electron less than half filling is generalized to the case where all possible nearest-neighbor Coulomb interactions (the density-density interaction $V$, bond-charge interaction $X$, exchange interaction $F$, and hopping of double occupancies $F'$) are included. It is shown that for ferromagnetic exchange coupling ($F>0$) ground states with maximum spin are stable already at finite Hubbard interaction $U>U_c$. For non-bipartite lattices this requires a hopping amplitude $t\leq0$. For vanishing $F$ one obtains $U_c\to\infty$ as in Nagaoka's theorem. This shows that the exchange interaction $F$ is important for stabilizing ferromagnetism at finite $U$. Only in the special case $X=t$ the ferromagnetic state is stable even for $F=0$, provided the lattice allows the hole to move around loops.Comment: 13 pages, uuencoded postscript, includes 1 table and 2 figure

Effects of Next-Nearest-Neighbor Hopping on the Hole Motion in an Antiferromagnetic Background

In this paper we study the effect of next-nearest-neighbor hopping on the dynamics of a single hole in an antiferromagnetic (N\'{e}el) background. In the framework of large dimensions the Green function of a hole can be obtained exactly. The exact density of states of a hole is thus calculated in large dimensions and on a Bethe lattice with large coordination number. We suggest a physically motivated generalization to finite dimensions (e.g., 2 and 3). In $d=2$ we present also the momentum dependent spectral function. With varying degree, depending on the underlying lattice involved, the discrete spectrum for holes is replaced by a continuum background and a few resonances at the low energy end. The latter are the remanents of the bound states of the $t-J$ model. Their behavior is still largely governed by the parameters $t$ and $J$. The continuum excitations are more sensitive to the energy scales $t$ and $t_1$.Comment: To appear in Phys. Rev. B, Revtex, 23 pages, 10 figures available on request from [email protected]

За кадры. 1966. № 34 (1157)

На встречу мечте / Г. МартинНовый состав парткомаЗаочники получают дипломы / В. ЖестовМолодцы, здорово!30 лет в институтеОпыт, работа, задачи / А. В. АстафуровТеснее держать связь с секторами / А. В. ТрихановВ подготовке инженеров нет мелочей / А. Я. КовылинНеувязки в учебной программе / Н. А. БерлизевКаждая кафедра - воспитатель / М. А. БабушкинаПоставленные задачи выполнить / В. С. КолесниковБольше внимания спортивной работе / Д. В. МоравецкийКрепить ответственность и дисциплину / И. И. КаляцкийСтроек новый размах / В. В. АгапитовИз постановления конференцииВнимая музики стихи / В. ЖестовАсино / С. ФедотовСовесть / М. СергеевЯ с тобою, мой милый, слажу... / А. МеркушеваИ ничего в тебе дурного... / А. СоловьевНужен художественный совет / Л. Е. Драчковска

За кадры. 1974. № 52 (1808)

Эхо событийУспевать всюду / П. КондаковПервый шаг к цели / В. ДаниловВсесоюзная школа по сильноточным ускорителям / А. Н. ДиденкоВчера - абитуриент, сегодня - студент / М. ФальковскийЗадачи дня / Ю. ЮрьевСтарейшина института / И. Т. ЛозовскийРуками студентов / В. ИгнашевОперация "Прополка" / А. Каргапольцева, Ю. БеликМесяц в деревнеПервый, но не последний / М. ПогореловВстречи... / А. Батурин"Мы вернемся к тебе, Каргасок!" / В. Олекс, В. Шаул