Географическое положение и территориальные структуры. Памяти И. М. Маергойза

Научная и техническая литература

Географическое положение и территориальные структуры. Памяти И. М. Маергойза

Автор:

Сборник посвящен памяти выдающегося советского экономико-географа Исаака Моисеевича Маергойза. Свое имя — ГЕОГРАФИЧЕСКОЕ ПОЛОЖЕНИЕ И ТЕРРИТОРИАЛЬНЫЕ СТРУКТУРЫ — сборник получил от двух центральных для ученого тем, в разработку которых он внес особый вклад. Сборник состоит из двух частей, из них первая посвящена личности и судьбе самого И.М.Маергойза: сюда вошли материалы к его биографии и фотографии, воспоминания о нем его коллег и учеников, неизвестные или малоизвестные фрагменты из его научного наследия. Вторую часть, озаглавленную ПОЛИМАСШТАБНОЕ РАЗВИТИЕ. ИДЕИ И.М.МАЕРГОЙЗА В ПОТОКЕ ВРЕМЕНИ и состоящую из четырех разделов, составили научные статьи современных авторов, посвященные темам, над которыми работал ученый. В первый раздел второй части включены статьи по вопросам теории, методологии и методики экономической географии, в трех остальных материалы распределены в соответствии с масштабами рассмотрения эмпирическонго материала: глобальным, страновым (на примере России) и внутристрановым (регионы и города). Сборник воздает честь и фиксирует отношение экономико-географического социума к одному из своих классиков, умершему более 35 лет тому назад. Он не только анализирует и систематизирует научное наследие И.М.Маергойза, но и показывает, на каких направлениях и в какой степени оно сегодня сохранило свою актуальность и свой вдохновляющий потенциал. Многие статьи вносят прямой и несомненный вклад в развитие заложенных И.М.Маергойзом теорий.

Biofertilizers for Organic Farming

Научная и техническая литература

Biofertilizers for Organic Farming

Автор:

Organic farming and good agricultural practices (G.A.P) intrigues the concern of both consumers and producers of agricultural commodities. Principally, such practices are based on the concept of rationalizing agrochemical inputs and maximizing biological activities in the plant-soil system. Bio-preparates (Biofertilizers and Bio-pesticides) of various rhizobacteria are potential candidates supporting plant nutrition and health. Their applications are extensively experimented for prospective future marketing and practicing. The book with its 7 chapters is providing strong experimental evidences on the value add of using agro-industrial effluents (Bakers’ yeast, starch, sugar and olive oil industries) and plant juices as accessible/economic substrates for biomass production and formulation of bio-preparates of rhizobacteria. The presented results of pot and field trials strongly emphasize the importance of bio-preparates as a potential practice for organic farming of field and vegetable crops under the impoverished conditions of semi-arid deserts. The book is an important resource for experts, researchers and students of agriculture, biotechnology, organic farming and environment.

Evaluation of Some Chelators Efficacy in Treatment of Lead Toxicity

Научная и техническая литература

Evaluation of Some Chelators Efficacy in Treatment of Lead Toxicity

Автор:

In a search for better antidotes of metallic pollutants, many chemical (drugs) were evaluated. The aim of the present study was the evaluation and comparison the efficacy of two familiar antidotes DMSA and DMPS used for treatment of lead toxicity. The current study was designed to evaluate the efficacy of both DMSA and DMPS in treatment of long-term lead toxicity through assessment of hematological, biochemical, histopathological and levels of lead in some tissues (liver, kidney and brain) of exposed rats. One hundred twenty male albino rats were divided into four groups (30 each). The first group (C) was used as control, the 2nd, 3rd and 4th (L, D and P) were exposed to lead acetate in drinking water (100 ppm) for 12 weeks. Both D and P groups were treated with DMSA and DMPS respectively after 2, 4, 6, 8, 10, 12 weeks 24 hours prior to sampling. The investigated parameters were hematological picture, biochemical parameters (total protein, ALT, AST, ?–GT, LPO, NO and SOD), lead levels (liver, kidney and brain) and histopathological examination.

Механика тонкостенных конструкций. Статика

Научная и техническая литература

Механика тонкостенных конструкций. Статика

Автор: В. Л. Бидерман

В настоящей книге изложены теоретические основы и практические методы расчета на прочность пластин, оболочек и тонкостенных стержней. Значительное внимание уделено численным методам расчета круглых пластин и оболочек вращения, ориентированным на применение средств программирования.Книга предназначена для инженеров и научных работников, занимающихся прочностными расчетами конструкций. Она будет также полезна для студентов и аспирантов, специализирующихся в этой области.

Power Optimization of CDMA based Tactical Networks

Научная и техническая литература

Power Optimization of CDMA based Tactical Networks

Автор:

Wireless communication systems which employ multiple access techniques require very sensitive management of the sources. This is the key requirement because of random and frequent movement of mobile users and rapid variations in the channel. In Code Division Multiple Access (CDMA) based wireless communication systems, the most important issue on transmitter side is the power management. Intelligently controlled power heavily improves the systems performance and capacity. The requirement of power control becomes more important in tactical network which is a type of self organizing and self operating systems. The aim of this research work is to optimize the transmitted powers of mobile users in a multiuser CDMA based tactical networks. The proposed power optimization method for tactical networks is of valuable importance because it can be extended to other types of networks which are self organizing and infrastructureless. This work deals with the power optimization of multiple users of CDMA system where only peer-to-peer communication can take place due to the absence of any central unit or base station.

Process based Modeling in Constructed Wetlands

Научная и техническая литература

Process based Modeling in Constructed Wetlands

Автор:

Data can become information if we know the processes involved. Information can become knowledge if we see the system that is operating. But Knowledge only becomes wisdom when we can see how any system must change, and can deal with the reality (Peter Allen, Coherence,Chaos and Evolution in the Social Context, Futures 26: 597,1994). Constructed wetlands are dynamic ecosystems that generally have poor predictive capabilities. Therefore, the author developed a process based model for nitrogen (N) and phosphorus (P) removal in a novel configuration constructed wetland system to understand the wetland function and structure, testing hypothesis and making predictions.