Böcker utgivna av LAP Lambert Academic Publishing

The central problem addressed is how when an emulsion is used as a lubricant, an oil droplet may be brought to steel substrate to provide microhydrodynamic lubrication. This happens by disjoining a thin water film adhered to steel substrate separating oil from substrate. Quantum mechanical and thermodynamic insights are considered to build a model. The model may be manipulated by selection surfactants and substrates of different chemical potentials to create situations, which enable the disjoining of water film. Different types of forces using atomic force microscopy and physic-chemical methods to validate the model and come to the conclusion, that for a given chemical potential only when the droplet size is controlled by surfactant chemistry and concentration to remain below a critical size it is possible to create a strongly attractive regime between the oil and the steel to bring about the disjoining process. The author demonstrates experimentally for a range of substrates, surfactants and their concentrations in the media, that there is a combination, as suggested by his theoretical model, for which the coefficient friction, in steel on steel sliding experiment, is optimum.

A cosmological model was developed using a quantum equation of state of hidden photon gas, as well as cosmic time. One of the primary objectives of this model is to see if determining the observed rotation speed of galactic matter is possible, without using dark matter DM (halo) as a parameter. To do so, a numerical application of the evolution of variables in accordance with cosmic time and a new state equation was developed to determine precise, realistic values for a number of cosmological parameters, such as energy of the universe U, cosmological constant Λ, curvature of space k, energy density, age of the universe etc. The current version of the model partially explains several of the observed phenomena that raise questions since CMB and JWST (VETG, Hubble tension, SMBH).

The economic trajectory of Ghana has been notably dynamic in recent years, consistently ranking among the top ten fastest-growing economies in Africa since 2017. However, the year 2020 brought unprecedented challenges, as plummeting oil prices and the onset of the COVID-19 pandemic precipitated a significant economic downturn, plunging the nation into recession. Through this analytical lens, this book was able to unravel the intricate interplay of diverse socio-economic factors and their respective contributions to the observed patterns of unemployment amid the COVID-19 crisis. Notably, this book reveals that the burgeoning financial burdens stemming from unemployment, coupled with the pervasive apprehension surrounding job security, collectively exert upward pressure on the national public debt. By foregrounding these hitherto underexplored dimensions, the study advances our understanding of the nuanced determinants of unemployment amid the COVID-19 crisis, thereby offering valuable insights for policymakers, researchers, and practitioners alike.

У навчальному посібнику представлені 8 лабораторних робіт з визначення поверхневої, проекційної та об'ємної твердості металів, вимірюваних за допомогою твердомірів Брінелля, Роквелла, Віккерса, Nano Test. Кожна робота представляє закінчене наукове дослідження, що дає змогу значно поширити функціональні можливості сучасних твердомірів. Для кожного метода розроблені та апробовані відповідні формули та детально прописана методика досліджень. Ці лабораторні роботи в першу чергу орієнтовані на аспірантів та студентів технічних навчальних закладів, но можуть також використовуватися на металургійному виробництві і в машинобудуванні для оцінки якості продукції за методами визначення твердості. Всі роботи пройшли апробацію у продовж останніх 10 років, набрали позитивний досвід і можуть бути рекомендовані для активного втілення у навчальний процес технічних університетів.

In an internal combustion engine, the cylinder head (often informally abbreviated to just head) sits above the cylinders on top of the cylinder block. It closes in the top of the cylinder, forming the combustion chamber. This joint is sealed by a head gasket. In most engines, the head also provides space for the passages that feed air and fuel to the cylinder, and that allow the exhaust to escape. The head can also be a place to mount the valves, spark plugs, and fuel injectors. The major automobile component subject to high temperature variation and thermal stress is engine cylinder. Fins are used on the surface of engine cylinder to increase the heat transfer rate. Heat rejection rate in engine cylinder fins can be enhanced by increasing its surface area. The objective of the present investigation is to examine the thermal properties by varying geometry, and material cylinder fins using solid works and Ansys work bench and the models are created by changing the geometry like (i) no of fins (ii) fin thickness (iii) gap between fins.

This publication serves as a comprehensive resource for scholars, researchers, and practitioners seeking to deepen their understanding of parametricism and its implications for architecture and engineering. By examining the historical context, theoretical foundations, and practical applications of parametric design, we aim to foster interdisciplinary dialogue and collaboration, paving the way for future advancements in the field.

To ensure the sustainability of chicken and rabbit production, some nutritionally practical strategies must be developed. Recently, chicken and rabbit farms have faced feed shortages due to the impact of climate change, high competition among livestock species, and war conditions. The present article aims to provide an overview of previous studies on the potential of using some plant and animal products as nutraceutical alternatives and feed additives in chicken and rabbit diets, separately or in combination, to act as natural growth promoters, antioxidants, anti-inflammatory, and antimicrobial agents, and immunostimulants. From the results, some unconventional plant and animal products can be successfully used as dietary supplements and substitutes in poultry and rabbit farms to improve animal growth, health, and reproduction. These products are rich in minerals, vitamins, enzymes, organic acids, flavonoids, and phenolic acids. These active substances benefit the animal's digestive tract in different ways, including activating the digestive enzymes, maintaining microbial balance, and promoting vitamin synthesis.

The recordings in our heads play aimlessly compromising our decisions. We sponge up popular beliefs that silence our thoughts. We are swayed like marionettes by our puppeteers. It's a two-step process. First, we are programmed. Then, we follow the crowd, assuming it's fate. We have a storage of uncharted resources to reverse the domino effect of our wrong choices. Discover the secret! how to unlock the unlimited-resolution version of ourselves and hold up against the forceful wind of brainwashing. Our journey takes us through emotional turbulence, self-deception and repressive monotony, to the gates of freedom and creativity, where we are introduced to the uniqueness inside us. Inner radiance is unlocked and shines as we rise to the Gestalt of self-actualization and authenticity. Above the corrosive toxins of hypnosis, the air is pure and clean. Light runs through our veins as if we are "filled with stars."

Core antrenmanları; kuvvet ve denge (statik ve dinamik) özelliklerini geliştirmesinin yanında, stabilite ile kol ve bacaklardaki kuvvet üretimi doğru orantılıdır. Karate'de core bölgesi çok önemlidir. El ve ayak teknik vuruşlarında kalça, karın ve bel bölgeleri denge ve kuvvet özellikleri yönünden ayrı ayrı öneme sahiptir. Yumruk vuruşlarında kalçanın dönmesi ne kadar önemliyse tekme esnasında da kalçanın dönmesi çok önemlidir. Tekmenin öncesi- esnası-sonrası evrelerinde kalçanın kuvvetli ve dengeli olması gerekir. Bu bilgiler ve literatür ışığında çalışmamızın amacı elit karatecilerde core antrenmanlarının kuvvet ve denge özelliklerine etkisinin incelenmesidir.

Self Compacting Concrete (SCC) is a fluid concrete mixture having no segregation and compact under its self weight. Self Compacting Concrete has fresh properties like passing ability, filling ability and segregation resistance. In this experimental research, the tests are conducted for mechanical and durability properties of self compacting concrete, containing Ordinary Portland Cement partially replaced by Fly ash and Silica fume. The performance of concrete mixture in terms of mechanical and durability characteristics for M40 grade concrete and w/c ratio is 0.38 constant in all mixes. Cement is replaced by fly ash (i.e., 5%, 10%, 15%, 20%, 25%, 30%), after getting the optimum value and further cement is replaced by silica fume (i.e., 2.5%, 5%, 7.5%, 10%) and 2% super plasticizer is used in all mixes to obtain a specific workability. The durability characteristics should be evaluated as carefully as the other mechanical properties. The results are showed a good relation between the strength and durability of Self Compacting Concrete when compared to Conventional Concrete.

Inorganic nanotubes are attracting the interest of many scientists and researchers, due to their excellent application potential in different fields. Nano particles are used in various composites. But our project is based on mixing nanoparticle with diesel. The main aim of this project is mixing HNT (Halloysite Nanotubes) with diesel fuel as a fuel additive at different compositions that are 25ppm, 50ppm, 100ppm respectively and investigate the effect of the mixed fuel (Diesel+HNT) such as performance characteristics and emission control in a compression ignition engine at various compositions. Our aim is to investigate the performance and emission characteristics of HNT mixed diesel without any engine modification.

Reactive Powder Concrete (RPC) is an ultra high strength and high ductility cementitious composite with advanced mechanical and physical properties. The development of incorporated sugarcane bagasse ash (SCBA) based RPC with several mineral admixtures and micro-steel fibre was studied. In this study, four different mineral admixtures were added in RPC such as Fly ash (FA), Ground granulated blast furnace slag (GGBS), Sugarcane bagasse ash (SCBA) and Glass powder (GP); also the micro steel-fibres were used. To develop sustainable RPC cement used is partially replaced with SCBA. The SCBA is partially replaced at 0%, 10%, 15%, 20% and 30%. Quartz Powder (QP) can be replaced in GP at different levels such as 0%, 50% and 100%. 3% of micro steel-fibres are used in the mix. Compressive strength and flexural strength was carried out at 7, 28 and 90 days. Strength results were improved by replacing 15% of SCBA with cement as well as complete replacement of QP with GP. Thus the specimens were casted for durability properties and mechanical properties of RPC were discussed.

In the monograph, the results of simultaneous laparoscopic operations (SLO) performed in a relatively large volume and wide range of clinical material in patients with high operational risk were analyzed, as a result of which these operations were improved, the most optimal methods were selected and used in patients with high operational risk, the results of which were compared and it was stated that operational tactics were improved and the most optimal methods were selected.This monograph is intended for surgeons with many years of clinical experience, masters, clinical residents, high-level students of medical universities, and doctors who are interested in this field.

The book focuses on the exploration and evaluation of oil fields in the Niger Delta region of Nigeria, utilizing interactive petrophysics software to assess lithology and identify potential reservoir sands to delineate the lithology and establish the continuity of potential reservoir sands. The book delves into the methodology of utilizing various well logs, including Gamma-ray, spontaneous potential, compensated neutron, density log, sonic log, and resistivity log, to conduct detailed analyses. The findings suggest that the delineated sand units are predominantly hydrocarbon-bearing reservoirs, with an emphasis on gas. Through this exploration, the book offers valuable insights into the geology and potential resource extraction in the region, making it a compelling resource for professionals and enthusiasts alike in the field of petroleum geology and exploration.

As a paradigm, we must methodically doubt (Descartes), if necessary, even from our own teacher (Bacon), in order to devote ourselves to the search for the correct diagnosis that will allow us with the greatest precision (Spinoza), to adequately treat and solve the problem of our human patient, our problem. We must bear in mind the different types of prejudices that are so deeply rooted in our society today that they threaten the development of the sciences.It will be necessary to keep ourselves in the constant search for the truth in order to try to get closer to the diagnosis that afflicts that being who approaches us for help.It is vitally important to continually observe man as a substantiated, unique entity, impossible to separate into two different things, although we may study them separately and divide him into two which will always be one as long as he exists as a man.The analysis of the patient's ordinary language for the physician will be of great use in an attempt to minimize diagnostic error in medical semiology.Conversation humanizes the relationship between two individuals who are fundamentally different, the doctor and the patient.

A unified approach is proposed to explain the set of phenomena that accompany the influence of hydrocavitation and magnetic field on water systems. The mechanism of influence of the magnetic field on the kinetics of biochemical reactions was investigated. The magnetic field significantly affects the kinetics of those physicochemical processes in aqueous solutions, in the mechanism of which hydrogen bonds play a dominant role. The simultaneous cavitation-magnetic effect on the liquid medium allows to achieve a significant intensification of physico-chemical transformations in water flows and a change in its properties: an increase in pH, a decrease in the coefficient of surface tension and boiling point. As a result of the conducted research, a number of designs of vibrating machines and equipment have been developed, which can be used to improve the characteristics of drinking water, preliminary preparation for its further treatment, illumination and oxygen saturation, acceleration of the fermentation processes of biological particles in water streams.

The world has a considerable seacoast area; many cities and towns and villages were established across the sea coast regions. Huge construction activates are taking place across the seacoast areas. Due to use of groundwater in these regions many buildings are affected with corrosion. In order to get potable water for mixing and curing of concrete in these regions, people have to buy potable water and its increase cost for construction. Hence, in this experimental work, an experimental investigation is disbursed on the removal of chlorides in groundwater by utilizing ordinary Portland cement square blocks. Cement square blocks, size of 50 x 50 x 10 mm, with water cement ratio 0.28 were cast with ordinary Portland cement. Results discovered that cement square blocks were cast with ordinary Portland cement has given good expulsion of chlorides in groundwater samples. And considerable impact on ions concentration that are a gift in groundwater. And regression analysis was carried out on experimental results. Results from regression analysis and laboratory experiment are compared. Regression analysis is perfectly fit for experimental results and R square values of all characteristics.

Монография предназначена для специалистов, занимающихся обеспечением национальной и информационной безопасности государства, а также работникам дипломатических отношений. Рассматриваются основные понятия обеспечения национальной информационной безопасности, модели обеспечения системы безопасности, классификация информационных угроз и характеристика их последствий, построение системы защиты информации, особенности организации информационной безопасности в стратегии меж- государственных отношениях. Книга рекомендуется для исследователей, занимающихся изучением современных международных отношений и мировой поли- тики, специалистов в области международной и национальной ин- формационной безопасности, а также широкому кругу читателей, интересующихся данной проблематикой.

The book entitled "Rheological Analysis of Cultured Meat" is structured into three chapters: properties of cultured meat, scale-up economics for cultured meat, and application of texture analysis methods for the characterization of cultured meat. The study encompasses subchapters such as history, first public demonstration, entering the market, technical aspects, cell lines, bioreactors, tissue engineering, porosity, vasculature, biochemical properties, crystallinity, degradation, edibility, cellulose, chitin, collagen, mycelium, nanomaterials, spin, additive manufacturing, fermentation, startups, research challenges, differences with common meat, aspects related to health and the environment, the role of genetic modification, ethical considerations, and the economy.

Glass ionomers apparently play a useful part in restorative dentistry. In addition to its excellent properties it provides sufficient scope for modification and improvement. Glass ionomer cements are very aptly referred to as "Man made dentin" as well as "dentin substitute". It is more than fifty years since the introduction of the glass ionomer cement family to the dental profession. After a slow start on the way they can now be regarded as well understood and thoroughly researched materials with very wide applications.

Dental care is extremely costly and beyond most people means in developing countries. Having a great smile, not only instills confidence but also a feeling of self pride and accomplishment. However, the prohibitive cost of dental treatment has become a hindrance that deprives people from readily availing services from qualified clinicians. Paying the full price for dental treatment can be overwhelming and challenging, especially if major dental work needs to be done. This book encompasses the importance of finance in dental care, how increase in cost in dental care creates a hurdle for community and leads to an increase in dental problems. It also includes a number of mechanisms that can be opted to pay a dentist fee.

Persistent homology has become an important tool in non-linear data reduction. Its sister theory, Persistent cohomology, has attracted less attention in the past eventhough it has many advantages. We surveyed several literatures and present a summary of the status quo in persistent (co)homology covering the theory, computations, representations in terms of cycles (for persistent homology) and cocycles (for persistent cohomology), lens (quotient) space and their equivalence. Moreover, we computed the persistent homology and persistent cohomology for the 2 - sphere both manually and computationally (Using Ripserer). In both cases, same result was obtained, particularly in the computation of their barcodes much more that persistent cohomology is not only faster in computation than persistent homology, but also uses less memory in a little time.