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The Foundations Of Celestial Mechanics

Celestial mechanics is a course that is fast disappearing from the curricula of astronomy departments across the country. The pressure to present the new and exciting discoveries of the past quarter century has led to the demise of a number of traditional subjects. In point of fact, very few astronomers are involved in traditional celestial mechanics. Indeed, I doubt if many could determine the orbital elements of a passing comet and predict its future path based on three positional measurements without a good deal of study. This was a classical problem in celestial mechanics at the turn of this century and any astronomer worth his degree would have had little difficulty solving it. Times, as well as disciplines, change and I would be among the first to recommend the deletion from the college curriculum of the traditional course in celestial mechanics such as the one I had twenty five years ago.

QURILISH MEXANIKASI

―Qurilish mexanikasi‖- fani qurilish mutaxassisligi yo’nalishi bo’yicha ta’lim olayotgan talabalar uchun eng kerakli fanlardan biri hisoblanadi. Yuqori malakali quruvchi- muhandislarni tayyorlashda ―Qurilish mexanikasi‖ fanining ahamiyati beqiyosdir. Bu fan konstruktsiya va inshootlarning mustahkamligi, bikrligi, zilzilaga bardosh berishligi, ustuvorligini hisoblash prinsiplari, metodlari to’g’risidagi fandir. Konstruktsiya – inshootlarning ideallashtirilgan sxemasi sterjenlar sistemasida ifodalanadi.

ЎЗБЕКИСТОН РЕСПУБЛИКАСИДА БЮДЖЕТЛАРАРО МУНОСАБАТЛАРНИ ТАКОМИЛЛАШТИРИШ

Ҳозирда жаҳоннинг етакчи илмий марказлари ва илмий-тадқиқот муассасаларида бюджетлараро муносабатларни такомиллаштиришнинг қуйидаги муаммолари ва илмий йўналишлари тадқиқ этилмоқда: бюджет майдони ичида харажатлар эҳтиёжларини ва тенглаштириш дастурларининг асосий жиҳатларини аниқлашда мавжуд инновацион усуллар ва услубий ёндашувларни ишлаб чиқишни такомиллаштириш, «харажатларни бошқариш» парадигмасидан «натижаларни бошқариш» парадигмасига ўтиш (натижага йўналтирилган бюджетлаштириш), давлат молиясини бошқариш самарадорлигини ошириш мақсадида иқтисодий-математик моделлаштириш ва прогнозлашнинг кенг кўламли усулларини қўллаш, давлат бюджетлари учун интеграциялашган ахборот муҳитини яратиш учун замонавий рақамли технологияларни жорий этиш ва ҳоказо.

The First Three Minutes

This book grew out of a talk I gave at the dedication of the Undergraduate Science Center at Harvard in November 1973. Erwin Glikes, president and publisher of Basic Books, heard of this talk from a mutual friend, Daniel Bell, and urged me to turn it into a book. At first I was not enthusiastic about the idea. Although I have done small bits of research in cosmology from time to time, my work has been much more concerned with the physics of the very small, the theory of elementary particles. Also, elementary particle physics has been extraordinarily lively in the last few years, and I had been spending too much time away from it, writing non-technical articles for various magazines. I wanted very much to return full time to my natural habitat, the Physical Review.

QURILISH MEXANIKASI

O‘quv qo‘llanmada inshootlarning hisoblash sxemalari, shuningdek, ko‘p oraliqli statik aniq balkalarni doimiy va harakatlanuvchi kuchlar ta’siriga hisoblash, ta’sir chiziqlar yordamida zo‘riqishlarni aniqlash, statik aniq tekis fermalarni doimiy va harakatlanuvchi kuchlar ta’siriga hisoblash, uch sharnirli arka va ramalarni doimiy va harakatlanuvchi kuchlar ta’siriga hisoblash, tortqichli arkalar hisobi, statik aniq oddiy sistemalarda ko‘chishlarni aniqlash mavzulari bayon qilingan.

The Finite Element Method

This volume appears for the first time in a separate form. Though part of it has been updated from the second volume of the fourth edition, in the main it is an entirely new work. Its objective is to separate the fluid mechanics formulations and applications from those of solid mechanics and thus perhaps to reach a different interest group. Though the introduction to the finite element method contained in the first volume (the basis) is general, in it we have used, in the main, examples of elastic solids. Only a few applications to areas such as heat conduction, porous media flow and potential field problems have been presented. The reason for this is that all such problems are self-adjoint and that for such self-adjoint problems Galerkin procedures are optimal. For convection dominated problems the Galerkin process is no longer optimal and it is here that most of the fluid mechanics problems lie. The present volume is devoted entirely to fluid mechanics and uses in the main the methods introduced in Volume 1. However, it then enlarges these to deal with the non-self-adjoint problems of convection which are essential to fluid mechanics problems.

QURILISH MEXANIKASI FANIDAN MISOL VA MASALALAR TO‘PLAMI

Ushbu uslubiy ko‘rsatmada “Qurilish mexanikasi” fanining asosiy: statik aniqmas ramalarni hisoblash mavzusiga doir misollar, mustaqil ishlash uchun masalalar ko‘rsatilgan. Bu misollarni yechishda keng tarqalgan ikki usulda, statik aniqmas ramalarni kuchlar va ko‘chishlar usulida yechib ko‘rsatilgan. Bundan tashqari ilovada maxsus sirtqi talabalari mustaqil yechishlari uchun variantlar, ko‘chishlar usulining shabloni berilgan

Дошкольная педагогика

B учебном пособии представлена личностно-ориентированная модель воспитания и развития дошкольников. Рассматриваются цели и задачи педагогики с учетом возрастных особенностей дошкольников; анализируется специфика процессов обучения и воспитания в дошкольном образовательном учреждении.

Общемашиностроительные нормативы режимов резания для технического нормирования работ на металлорежущих станках. Часть 2

Сборник нормативов рассчитан на нормировщиков и технологов, а также других инженерно-технических работников, занятых расчетом технически обоснованных норм времени на работы, выполняемые на металлорежущих станках в механических цехах машиностроительных предприятий.

Диагностика и коррекция нарушений чтения и письма у младших школьников

Рассматриваются современные научные представления о симптоматике и механизмах нарушений чтения и письма у младших школьников. Дана схема обследования детей, страдающих дислексией и дисграфией. Представлен речевой и наглядный материал для исследования нарушений чтения и письма.

Finite Difference Time Domain Method for Electromagnetics

The finite difference time domain (FDTD) approach is rapidly becoming one of the most widely used computational methods in electromagnetics. There are several reasons for this, including the increased availability of low cost but powerful computers, and increasing interest in electromagnetic interactions with complicated geometries, which include penetrable dielectric and/or magnetic materials. Just as important perhaps is the extreme simplicity of the method. The fundamentals of FDTD can be grasped easily by undergraduate students, more easily than traditional frequency-domain approaches to electromagnetics. Yet FDTD is capable of computing electromagnetic interactions for problem geometries that are extremely difficult to analyze by other methods. It is this combination of simplicity and power that makes FDTD such a popular method.

КАТТИК ЖИСМ ФИЗИКАСИ

Ушбу укув цулланмада каттиц жисмлар физикасининг асосий булимлари хасида маълумотлар келтирилган. К,атгик жисмларнинг айрим хоссалари буйича турлари, хозирги замон цатгик жисм квант физикаси асосий тасаввурлари заминида металлар, ярим утказгичлар, диэлектрикларнинг иссиклик. механик, электрик, магнитик хоссалари баён килинган. Бундам ташк,ари, \озир фан ва техникада катга а\аминт касб этаётган к,аттик материаллар — керамика, мартенситлар, композитлар хоссалари ва кулланиши тугрисида \ам маълумотлар берилган. Утилган мавзуларни мустахкамлаш мак,садида \ар бобнинг охирида назорат учун саволлар, шу бобга тегишли масалалар жойлаштирилган. Кулланмада келтирилган расмлар, жадваллар, кушимчалар унинг матнини тулдиради. Укув кулланма олий укув юртларининг тегишли касблар буйича мутахассислашаётган бакалавр, магистр талабалари. тадкикотчилар, аспирантлар ва укитувчилар учун мулжалланган.

The Fabric of Cosmos

Space and time capture the imagination like no other scientific subject. For good reason. They form the arena of reality, the very fabric of the cosmos. Our entire existence-everything we do, think, and experiencetakes place in some region of space during some interval of time. Yet science is still struggling to understand what space and time actually are. Are they real physical entities or simply useful ideas? If they're real, are they fundamental, or do they emerge from more basic constituents? What does it mean for space to be empty? Does time have a beginning? Does it have an arrow, flowing inexorabiy from past to future, as common experience would indicate? Can we manipulate space and time? In this book, we follow three hundred years of passionate sc~entific investigation seeking answers, or at least glimpses of answers, to such basic but deep questions about the nature of the universe.

ЎЗБEКИCТOН РECПУБЛИКACИДA ДAВЛAТ МOЛИЯ ТИЗИМИНИ ИCЛOҲ ҚИЛИШНИНГ ИCТИҚБOЛЛИ ЙЎНAЛИШЛAРИ

Ўзбекистонда бюджет ва солиқ сиёсати соҳасида олиб борилаётган ислоҳотлар давлат бюджетининг очиқлиги ва шаффофлигини таъминлаш, бюджетни шакллантириш, қабул қилиш ва ижро этиш, унинг назоратини амалга ошириш ҳамда мониторингини юритиш, шунингдек, соҳага жаҳон стандартлари тизимларини жорий этиш, жамоатчиликни бюджет жараёнига жалб қилиш даражасини оширишга қаратилган. «Бюджет ҳисобидан маблағ ажратиладиган хар кандай дастур ёки лойиҳанинг сифат ва миқдор кўрсаткичларидан иборат, натижага йўналтирилган индикаторлари бўлиши керак».

POLIMERLAR FIZIKASI VA KIMYOSI

“Polimerlar fizikasi va kimyosi” fanidan laboratoriya mashg’ulotlari bo’yicha tayyorlangan uslubiy ko’rsatma 5522300 “To’qimachilik, yengil va qog’oz sanoati buyumlari kimyoviy texnologiyasi” yo’nalishi bo’yicha tahsil olayotgan bakalavrlar uchun mo’ljallangan. Uslubiy ko’rsatmada polimerlar xossalarini tekshirishning fizikkimyoviy usullari, polimerlanish, polikondensatlanish reaktsiyalari, polimerlarda bo’ladigan kimyoviy o’zgarishlar, sellyuloza va uning hosilalari haqida ma’lumot berilgan. Shuningdek, polimerlarning eruvchanligini, molekulyar massasini, ularning tarkibidagi suv, kul miqdorini aniqlash, hamda, polimerlar sintezining polimerlanish va polikondensatlanish reaktsiyalari, polimerlar gidrolizi bilan bog’liq laboratoriya ishlari bo’yicha vazifalar, ularni bajarish tartibi, ishga oid topshiriqlar va har bir bo’lim oxirida nazorat savollari keltirilgan.

Технология шлифования и заточки режущего инструмента

Приведены данные по шлифуемости быстрорежущих сталей, твердых сплавов, сверхтвердых материалов и керамики и качеству обработанной поверхности от технологических факторов обработки инструмента.