Use of computers to exclude the influence of radiometer instability upon measurement results

A radiometer, practically insensitive to great fluctuations in the equipment amplification coefficient, was developed by dividing the useful signal by a reference signal and modulating the two signals at different frequencies. The signals are simultaneously separated by corresponding synchronous detectors and recorded over two channels. The operation is simplified by replacing the continuous signals by a sampling of discrete values, and using a digital computer. The four steps involved in the process are described and a block diagram is included. This technique not only directly connects the radiometer with the computer, but also records all data provided by the control and signal channels

Decay modes of two repulsively interacting bosons

We study the decay of two repulsively interacting bosons tunneling through a delta potential barrier by direct numerical solution of the time-dependent Schr\"odinger equation. The solutions are analyzed according to the regions of particle presence: both particles inside the trap (in-in), one particle in and one particle out (in-out), and both particles outside (out-out). It is shown that the in-in probability is dominated by exponential decay, and its decay rate is predicted very well from outgoing boundary conditions. Up to a certain range of interaction strength the decay of in-out probability is dominated by the single particle decay mode. The decay mechanisms are adequately described by simple models.Comment: 18 pages, 13 figure

Conceptual inconsistencies in finite-dimensional quantum and classical mechanics

Utilizing operational dynamic modeling [Phys. Rev. Lett. 109, 190403 (2012); arXiv:1105.4014], we demonstrate that any finite-dimensional representation of quantum and classical dynamics violates the Ehrenfest theorems. Other peculiarities are also revealed, including the nonexistence of the free particle and ambiguity in defining potential forces. Non-Hermitian mechanics is shown to have the same problems. This work compromises a popular belief that finite-dimensional mechanics is a straightforward discretization of the corresponding infinite-dimensional formulation.Comment: 5 pages, 2 figure

ІНФОРМАЦІЙНО-АНАЛІТИЧНА СИСТЕМА ЗАКЛАДІВ ОХОРОНИ ЗДОРОВ'Я "ЕЛЕКТРОННА ЛІКАРНЯ"

Problems of creating a modern information and analytical system for establishments of public health service in Ukraine are considered.It is shown on a concrete example that exactly information is a basis for decision-making in a hospital. Therefore, the automatization of establishment will sure to result in increase of efficiency of its workand, consequently, to improved quality of rendering medical care. The development of information and analytical system "Electronic hospital" was carried out in two stages and the following step of its development should be connected to telemedicine.It is noted, that under new social and economic conditions a weak part in information system in public health service in Ukraine is the absence of authorized integral standards in medical information. The necessity of developing the integral unified medical documentation is emphasized.Рассмотрены проблемы создания современной информационно - аналитической системы для учреждений здравоохранения.Показано на конкретном примере, что именно информация является основой для принятия решений в больнице. Поэтому автоматизация учреждения обязательно приведет к повышению эффективности его работы и, как следствие, - к улучшению качества оказания медицинской помощи. Разработка информационно-аналитической системы «Электронная больница» осуществлялась в два этапа и следующая ступень её развития должна быть связана с телемедициной.Отмечается, что в новых социально - экономических условиях слабым звеном в информатизации системы здравоохранения в Украине является отсутствие утвержденного единого стандарта медицинской информации.Подчеркивается необходимость разработки единой медицинской унифицированной документации.Затронуты также важные вопросы использования международных стандартов обмена информацией.Розглянуті проблеми створення сучасної інформаційно - аналітичної системи для установ охорони здоров'я в Україні.Показано на конкретному прикладі, що саме інформація є основою для прийняття рішень в лікарні. Тому автоматизація установи обов'язково приведе до підвищення ефективності її роботи і, як наслідок, - до поліпшення якості надання медичної допомоги. Розробка інформаційно - аналітичної системи «Електронна лікарня» здійснювалася в два етапи і наступний ступінь її розвитку повинен бути пов'язаний з телемедициною.Наголошується, що в нових соціально - економічних умовах слабкою ланкою в інформатизації системи охорони здоров'я в Україні є відсутність затвердженого єдиного стандарту медичної інформації.Підкреслюється необхідність розробки єдиної медичної уніфікованої документації

Fractal Weyl law for quantum fractal eigenstates

The properties of the resonant Gamow states are studied numerically in the semiclassical limit for the quantum Chirikov standard map with absorption. It is shown that the number of such states is described by the fractal Weyl law and their Husimi distributions closely follow the strange repeller set formed by classical orbits nonescaping in future times. For large matrices the distribution of escape rates converges to a fixed shape profile characterized by a spectral gap related to the classical escape rate.Comment: 4 pages, 5 figs, minor modifications, research at http://www.quantware.ups-tlse.fr

Archaeological supplement B to Damgaard et al. 2018: discussion of the archaeology of Central Asian and East Asian Neolithic to Bronze Age hunter-gatherers and early pastoralists, including consideration of horse domestication

This is the author accepted manuscript. The final version is available from Zenodo via the DOI in this recordThis is part of the additional supplementary material for Damgaard et al., The first horse herders and the impact of early Bronze Age steppe expansions into Asia. Science. DOI: 10.1126/science.aar7711. Note that the author accepted manuscript version of the article plus supplementary material and additional supplementary material is in ORE at http://hdl.handle.net/10871/32791The archaeological evidence relating to selected key cultures from Central and East Asia from the Neolithic to the Bronze Age is summarized. These cultures include the Eneolithic (Copper Age) Botai culture of northern Kazakhstan, the Bronze Age Okunevo culture from the Minusinsk Basin in Russia and Neolithic to Bronze Age cultures of the Baikal Region in East Siberia. Special consideration is given to the debate surrounding horse domestication within the Botai Culture, and the key lines of evidence are summarized

Anti-de-Sitter Island-Universes from 5D Standing Waves

We construct simple standing wave solutions in a 5D space-time with a ghost scalar field. The nodes of these standing waves are 'islands' of 4D Minkowski space-time. For the 5D model with increasing (decreasing) warp factor there are a finite (infinite) number of nodes and thus Minkowski island-universes having different parameters, such as gravitational and cosmological constants. This feature is similar to the assumptions of the landscape models, which postulate a large number of universes with different parameters. This standing wave solution also provides a new localization mechanism - matter fields can reside only on Minkowski 'islands', where the background space-time does not oscillate.Comment: 14 page pre-print format. Discussion about connection to Weyl gravity added and "E&M" localization method added. To be published MPL

Bound and resonance states of the nonlinear Schroedinger equation in simple model systems

The stationary nonlinear Schroedinger equation, or Gross-Pitaevskii equation, is studied for the cases of a single delta potential and a delta-shell potential. These model systems allow analytical solutions, and thus provide useful insight into the features of stationary bound, scattering and resonance states of the nonlinear Schroedinger equation. For the single delta potential, the influence of the potential strength and the nonlinearity is studied as well as the transition from bound to scattering states. Furthermore, the properties of resonance states for a repulsive delta-shell potential are discussed.Comment: 19 pages, 10 figure