Assessment of anaerobic co-digestion of food waste and wastewater solids for sustainable waste management in Yosemite National Park, USA

The growing need for sustainable municipal solid waste treatment and energy production has driven the development of new waste management methods like co-digestion. Anaerobic co-digestion of food waste (FW) and wastewater solids (WWS) has been implemented at a few wastewater treatments plants to efficiently treat organic wastes and produce methane-rich biogas as an energy source. Yosemite National Park has an opportunity to design a new co-digestion facility with an upcoming upgrade to their local wastewater treatment plant in El Portal, California. The Park annually produces approximately 5 million tons of primary WWS and 1 million tons of FW waste, with a volatile solid ratio of 70:30 FW to WWS, or 70% FW. Diverted FW is currently sent to the Mariposa County landfill’s compost facility. To measure the possible increase in biogas production associated with FW addition to WWS, a biochemical methane potential (BMP) test was done over 35 days under mesophilic conditions with treatment mixing ratios ranging from 0% to 100% FW on a volatile solids basis. Calculated annual methane production increased 3.25 times from 0% FW scenario (WWS only) versus a 70% FW scenario, translating to a potential increase in methane production at the wastewater treatment plant of 28,000 to 91,000 m3/yr. Results showed that if the wastewater treatment plant also implemented combined heat and power to combust the increased biogas from 70% FW co-digestion, potentially 920,000 kWh/yr could be produced to cover all electricity and heating needs. This research demonstrates that Yosemite National Park could combine FW and WWS to sustainably manage their organic waste in line with their Zero Landfill Initiative, as well as produce enough energy to fully power the El Portal wastewater treatment plant

The microscopic basis for phase-sensitive experiments for determination of the order parameter symmetry in Fe-based superconductors

We present a microscopic theory of dc Josephson current, based on the construction of a coherent temperature Green function in the tight-binding approximation, in junctions with multiband superconductors. This theory is applied to the junctions with multiband Fe-based superconductors (FeBS) described by anisotropic s-wave order parameter symmetries, which probably realized in FeBS. We confirm microscopically the previously suggested crucial experiment for determination of the type of the order parameter symmetry in FeBS.Comment: 5 pages, 3 figure

Anomalous superconducting proximity effect and coherent charge transport in semiconducting thin film with spin-orbit interaction

We present a microscopic theory of the superconducting proximity effect in a semiconducting thin film with spin-orbit interaction ($N_{SO}$) in an external magnetic field. We demonstrate that an effective 1D Hamiltonian which describes induced superconductivity in $N_{SO}$ in contact with a usual $s$-wave superconductor possesses not only spin-singlet induced superconducting order parameter term, as commonly adopted, but spin triplet order parameter term also. Using this new effective Hamiltonian we confirm previous results for a normal current across contacts of $N_{SO}$ with a normal metal and for a Josephson current with the same $N_{SO}$ with induced superconductivity, obtained previously in the framework of the phenomenological Hamiltonian without spin-triplet terms. However, a calculated current-phase relation across the transparent contact between $N_{SO}$ with induced superconductivity in magnetic field and usual $s$-wave superconductor differs significantly from previous results. We suggest the experiment which can confirm our theoretical predictions.Comment: 5 pages, 6 figure

Valueology as a matter of training in the field of socio-cultural services and tourism

Deteriorating health of the Russian population emphasizes the special relevance of physical rehabilitation and health preservation in various service sectors of the population, particularly in the socio-cultural service and tourismУхудшение здоровья населения РФ подчеркивает особую актуальность проблемы физической реабилитации и здоровьесбережения в различных сферах обслуживания населения, в частности в социально-культурном сервисе и туризм

Lingo-cultural interpretation of sacred phytonyms with clear inner form

Linguistics is full of cultural and historic content as language is both the basis and product of culture. Language being a means of communication, helps to get knowledge about the world, culture, mentality of certain people. Approach to the language from the point of view of sacred phytonyms makes it possible to study the character of paralogical thinking and gives a view of a naïve world picture. Sacred phytonymy deals with names of plants, having healing effect, a well as those which are connected with names of saints (positive characteristic) and evil (negative characteristic).Языкознание пронизано культурно-историческим содержанием, поскольку язык – основа и продукт культуры. Язык, являясь средством общения, служит познанию мира, культуры, менталитета того или иного народа. В частности, подход к языку с точки зрения сакральной фитонимии позволяет изучить характер пралогического мышления и дает представление о наивной картине мира. С позиции сакральной фитонимии рассматриваются названия растений, обладающих лечебными свойствами, а также связанных с названием святых (положительная характеристика) и нечистой силой (отрицательная характеристика)

Математическое моделирование и всеобщая компьютеризация или имитационные модели

The author analyzes the possibilities of the method of mathematical modeling in solving specific economic problems. The role of a combination of mathematical modeling of real processes and their simulation on the compute

Математическое моделирование как творческий процесс

The author examines the possibilities of the method of mathematical modeling in terms of preparing students for future careers. Stages of the method of mathematical modeling. The influence of the method for the formation of creative thinking in the process of teaching mathematic

Имитационное моделирование для сферы экономики и финансов: Проблемы и перспективы

The author explores the possibility of using simulation in economic education. Shows the continuity of economic and mathematical modeling and simulation. Highlighted the benefits of simulation in the implementation of the integrative bonds mathematics, computer science and disciplines of financial and economic cycl