1,477 research outputs found
Structural organization of sacred landscapes
The article presents the results of scientific developments concerning the structural organization of sacred landscapes. The methodological basis of the study is the concept of constructive-geographic analysis, which is based on the approaches of the natural and the humanitarian sciences. The system approach to the study of sacred landscapes as a holistic organized territorial structure and a set of methods is used in this work, in particular: structural and logical generalization and system analysis, comparative and geographical, historical and geographical. The author considers the significance of the notion of sacral landscape more widely than religious, and considers it a natural, natural-anthropogenic, anthropogenic system associated with certain symbols of life, myths, significant events, religious feelings that are of great importance to a person or group of people and requires special respect and protection. The structural organization of all sacred landscapes is characterized by its properties and spatial structure and is closely connected with their social and functional purpose. As a result, such territorial systems can be divided into: confessional, taphal, actival, abnormal. The sacred landscape is characterized by polystructurenes, that is, the presence of spatial, temporal, morphological structure. In the spatial structure of the sacral landscape, the following components can be distinguished: a sacred object, anthropogenic and technogenic component, a landscape structure, a person with her spiritual experience. In addition, such a structure has a hierarchical structure, where individual, local, regional, national, global levels can be distinguished. The article presents the peculiarities of the temporal structure of sacral landscapes and outlines the external, internal, and the functioning time. Particular attention is paid to the characteristic of internal time, where one can distinguish the following phases of development: the formation of a natural, natural or anthropogenic landscape; the creation of a spiritual component; loss of sacred human perception of a natural, natural or anthropogenic landscape; the disappearance of the natural, natural anthropogenic landscape. Taking into account the morphological structure of the sacred landscape, it is substantiated that religious objects serving as markers of sacred landscapes can not correspond to one or another morphological unit of the landscape, that is, to completely repeat its outlines and boundaries. However, there is a correlation between the type of landscape landscape and the features of the sacred object that was formed there
Full counting statistics of a charge pump in the Coulomb blockade regime
We study the full charge counting statistics of a charge pump based on a
nearly open single electron transistor. The problem is mapped onto an exactly
soluble problem of a g=1/2 non-equilibrium Luttinger liquid with an impurity.
We obtain an analytic expression for the generating function of the transmitted
charge for an arbitrary pumping strength. Even though this model contains
fractionally charged excitations only integer transmitted charges can be
observed during finite observation times.Comment: 4 pages, 1 figur
Localized states due to expulsion of resonant impurity levels from the continuum in bilayer graphene
Anderson impurity problem is considered for a graphene bilayer subject to a
gap-opening bias. In-gap localized states are produced even when the impurity
level overlaps with the continuum of band electrons. The effect depends
strongly on the polarity of the applied bias as long as hybridization with the
impurity occurs within a single layer. For an impurity level inside the
conduction band a positive bias creates the new localized in-gap state. A
negative bias does not produce the same result and leads to a simple broadening
of the impurity level. The implications for transport are discussed including a
possibility of gate-controlled Kondo effect.Comment: 5 pages, 2 figure
Scattering of plasmons at the intersection of two metallic nanotubes: implications for tunneling
Journal ArticleWe study theoretically the plasmon scattering at the intersection of two metallic carbon nanotubes. We demonstrate that, for a small angle of crossing θ « 1, the transmission coefficient is an oscillatory function of λ / θ where λ is the interaction parameter of the Luttinger liquid in an individual nanotube.We calculate the tunnel density of states v(ω, x) as a function of energy ω and distance x from the intersection. In contrast with a single nanotube, we find that, in the geometry of crossed nanotubes, conventional ‘‘rapid'' oscillations in v(ω, x) due to the plasmon scattering acquire an aperiodic ‘‘slowbreathing'' envelope which has λ / θ nodes
Long-term results of laparoscopic management of hepatic hydatid disease
Clinica chirurgie nr.1, Universitatea Naţională de medicină, Odessa, Ucraina, Al XII-lea Congres al Asociației Chirurgilor „Nicolae Anestiadi” din Republica Moldova cu participare internațională 23-25 septembrie 2015Introducere: Incidenţa bolii hidatice hepatice este în creștere în Ucraina. Chirurgia reprezintă un “standard de aur” în
tratamentul acesteia. Metodele laparoscopice sunt noi și promiţătoare pentru tratamentul acestei patologii.
Scopul a fost în evaluarea rezultatelor la distanţă ale managementului laparoscopic al hidatidozei hepatice.
Material și metode: În perioada 2003-2013, 348 pacienţi cu chisturi hidatice ale ficatului au fost operaţi în departamentul
nostru. Rezultatele a 283 bolnavi (129 – barbaţi și 154 – femei) au fost studiate retrospectiv. Vârsta medie a constituit 37,5 ani
(18-72 ani). Patruzeci și doi pacienţi au avut chisturi multiple în ambii lobi ai ficatului.
Rezultate: În total 286 pacienţi au fost operaţi laparoscopic, 3 dintre aceștia au necesitat conversie la operaţie deschisă. În
cadrul intervenţiei laparoscopice, procedee conservative (chistectomia) s-au practicat la 249 (88%) pacienţi, procedee radicale
(rezecţii hepatice) – în 34 (12%) de cazuri. Comunicarea între chist și căile biliare s-a determinat intraoperator la 61 (21,6%)
pacienţi. Morbiditatea postoperatorie a fost notată la 48 (16,9%) pacienţi, inclusiv infectarea cavităţii reziduale adânci în 21 de
cazuri și bilioragie postoperatorie – în 27. Termenul mediu de supraveghere la distanţă a constituit 42 luni (6 luni-7 ani).
Recurenţa a fost detectată în 7 (2,5%) cazuri.
Concluzii: Analiza noastră demonstrează rezultate bune prin procedeele conservative efectuate preferabil pe cale
laparoscopică, rezervând abordarea radicală doar pentru cazurile selecte.Introduction: Incidence of hepatic hydatid disease is increasing in Ukraine. Surgery is the “gold standard” treatment.
Laparoscopic methods are new and promising for the treatment of this disease.
The aim was to assess long-term results of laparoscopic management of hepatic hydatid disease.
Material and methods: From 2003 to 2013, 348 patients with liver hydatid disease underwent surgery in our department.
Results of 283 patients were retrospectively studied. There were 129 males, and 154 females, mean age was 37.5 years
(range, 18-72 years). Fourty two patients had multiple cysts of both liver lobes.
Results: Totally 286 patients underwent laparoscopic procedures, 3 of them required conversion to open surgery. During
laparoscopic procedures, conservative surgery (cystectomy) was made in 249 (88%) patients, and radical surgery (resections of
liver) was made in 34 (12%) patients. A cyst-biliary communication was revealed intra-operatively in 61 (21.6%) patients.
Postoperative morbidity was seen in 48 (16.9%) patients, which included deep residual cavity infection in 21 patients, and
postoperative bile leak – in 27. Mean long-term follow-up was 42 months (range, 6 months-7 years). Recurrence was detected
in 7 (2.5%) cases.
Conclusions: Our long-term results showed good outcomes with conservative surgery as the preferred approach of
laparoscopic management, reserving radical approach for selected cases only
Scattering of plasmons at the intersection of two metallic nanotubes: Implications for tunnelling
We study theoretically the plasmon scattering at the intersection of two
metallic carbon nanotubes. We demonstrate that for a small angle of crossing,
, the transmission coefficient is an oscillatory function of
, where is the interaction parameter of the Luttinger
liquid in an individual nanotube. We calculate the tunnel density of states,
, as a function of energy, , and distance, , from the
intersection. In contrast to a single nanotube, we find that, in the geometry
of crossed nanotubes, conventional "rapid" oscillations in due
to the plasmon scattering acquire an aperiodic "slow-breathing" envelope which
has nodes.Comment: 4 pages, 2 figures (revised version
Universal conductivity and dimensional crossover in multi-layer graphene
We show, by exact Renormalization Group methods, that in multi-layer graphene
the dimensional crossover energy scale is decreased by the intra-layer
interaction, and that for temperatures and frequencies greater than such scale
the conductivity is close to the one of a stack of independent layers up to
small corrections
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