502 research outputs found
Determination of the strong vertices of doubly heavy baryons with pseudoscalar mesons in QCD
The strong coupling constant of doubly heavy baryons with light pseudoscalar
mesons and are computed within the light cone sum rules. We take
into account two-particle and three-particle distribution amplitudes of the
said pseudoscalar mesons. We compare our result with the one existing in the
literature
Explaining Reinforcement Learning with Shapley Values
For reinforcement learning systems to be widely adopted, their users must understand and trust them. We present a theoretical analysis of explaining reinforcement learning using Shapley values, following a principled approach from game theory for identifying the contribution of individual players to the outcome of a cooperative game. We call this general framework Shapley Values for Explaining Reinforcement Learning (SVERL). Our analysis exposes the limitations of earlier uses of Shapley values in reinforcement learning. We then develop an approach that uses Shapley values to explain agent performance. In a variety of domains, SVERL produces meaningful explanations that match and supplement human intuition
Gigantic peripheral osteoma of the mandible: a case report
Osteomas are osteogenic lesions that have a limited growth potential. They are comprised of histologically and
radiographically normal bone. Osteomas are categorized as central, peripheral or extraskeletal according to location. Clinically, peripheral osteomas (PO) are unilateral, sessile or pedunculated and have mushroom-like lesions
ranging from 10 to 40 mm in diameter. Osteomas affecting the mandible are rare. In this report, we presented a
gigantic peripheral mass on the left mandible in a 55-year old patient exhibiting clinical signs related to neoplasia
Some morphological features related to mandibular third molar impaction
Objective:
The aim of this study was to evaluate the effect of some morphological features of the mandible and
mandibular permanent molars on impaction of mandibular third molars with panoramic measurements in a Turkish
patient group.
Study design:
Standardized panoramic radiography variables compiled from 140 patients retrospectively were eva-
luated. Predictive variables included mesio-distal crown width and inclination of the mandibular molars, vertical
and horizontal surface dimension between distal surface of the lower second molar tooth and anterior surface of its
ramus, length and width of the mandible ramus and corpus, angle of the mandible gonion, the number of the lower
third molar roots, and angulations of roots of the lower third molars.
Results and Conclusions:
According to the data obtained in this study, the vertical height of the anterior border of
the ramus, length of the posterior basal corpus, mesio-distal diameters of the first, second and the third molars, 1/3
root angle of the third molar, number of third molar roots, inclination of the first molar to increase, vertical height
of the posterior border of the ramus, vertical height of alveolar crest, and height and the width of the retro-molar
space to decrease are all in direct proportion to the possibility of impaction of the third molar
Eski eserlerin sürdürülebilir periyodik bakımında mobilize muayene ve bakım-onarım ve denetim sisteminin kurulması
Eski Eserlerin Sürdürülebilir Periyodik Bakımında Mobilize Muayene, , Bakım –
Onarım ve Denetim Sisteminin Kurulması' tezinin ilk kısmında Türkiye'deki mevcut
koruma mevzuatı, kurumlar ve mali olanaklar ele alınmış ve uluslararası koruma
İlkeleri açısından Türkiye'deki koruma sistemi sorgulanmıştır.
Önerilecek koruma modeline ışık tutması düşüncesiyle Dünyanın farklı
bölgelerindeki eski eser koruma mevzuatları ve uygulamaları, farklı kıtalardaki ülke
örneklemeleriyle ortaya konmaya çalışılmıştır. Aktif, hareketli koruma modelinin
kurulması gerektiği fikrine destek olarak İstanbul Üst Bölge örneğinde 2003-2017
yılları arasında yapılan restorasyonlar ve onarımların sayısal değerleri tespit edilmiş,
İstanbul'daki toplam eski eser sayısı ile yüzdelik olarak mukayese edilmiştir.
İstanbul Tarihi Yarımada örneğindeki uygulamalar pilot bölge olarak seçilmiş olup,
türbe, tekke ve çeşmelerden oluşan anıt eserler ve Zeyrek'teki sivil mimari örnekleri
incelenmiştir. Söz konusu tarihi eserlerde öncelikle 2009 yılında yapılan onarımlar ve
müdahaleler ifade edilmiş, 2015 ve 2016 yılında çekilen fotoğraflar ve tespitlerle geçen
süredeki tahribat ve deformasyonlar belgelenmiştir.
Taşınmaz kültür varlıklarının farklı bir sistemle korunması gerektiğine dair somut
örnekler ve problemler ortaya konduktan sonra aktif/mobilize koruma modeli
önerisinin çalışma alanları ve etapları tanımlamış, merkezdeki lojistik destek birimleri
ayrıntılı bir şekilde ifade edilmiştir. Önerilen hareketli sistemin personel ve ekipman
açısından oluşumu şemalarla ifade edilmiştir. Eski eserlerde önerilen yeni koruma
modelinin müdahale edebileceği durumlar ve bakım onarımlar ise, taş yüzeyler, ahşap
aksam, çatı örtüleri, tesisat, peyzaj ve çevre düzenlemeleri olarak sınıflandırılmış ve
ayrıntılı bir şekilde anlatılmıştır. Türkiye'de koruma konusunda mevcut sistemle
önerilen yeni modelin entegrasyonunun nasıl sağlanacağı konusunda fikirler
geliştirilmiş ve şemalarla ifade edilmiştir.
Öneriler bölümünde, yeni koruma modelinin yönetim hiyerarşisindeki yeri;
Bakanlık, Vakıflar İdaresi, yerel yönetimler ve valilikler olmak üzere ayrı ayrı
şemalarla gösterilmiştir. Yasal dayanağın oluşturulmasına yönelik olarak 5226 sayılı
Kültür ve Tabiat Varlıkları Koruma Yasasında ek madde, çalışma yönetmeliği ve
Koruma Yüksek Kurulu ilke kararı örneği önerilmiştir.
Aktif/mobilize koruma modelinin finansal boyutu kaleme alınmış ve özel bütçeli bir
idare olması öngörülmüştür. Son kısımda tüm tez çalışmasının ışığı altında genel bir
değerlendirme yapılmış ve sonuçlar ortaya konmuştur.In the first part of the thesis entitled "Establishment of Mobilization Inspection,
Maintenance and Repair System in the Sustainable Preservation of Antiquities", the
existing protection legislation, institutions and financial facilities in Turkey were
discussed and the protection system in Turkey was questioned in terms of international
protection principles.
In anticipation of shedding light on the proposed model of protection, ancient
monuments protection legislation and practices in different parts of the world have
been put forward with examples of countries in different continents. In order to
support the idea that the Active Protection model should be established, the numerical
values of the restorations in the last 10 years were determined and compared with the
total number of antiquities in Istanbul.
Applications in the Istanbul Historical Peninsula were selected as the pilot
region, monumental works composed of tombs, tekkes and fountains and examples of
civil architecture in Zeyrek were examined. In the mentioned historical works,
primarily the repairs and interventions made in 2009 were expressed, and the
photographs and fixtures taken in 2015 and 2016, documented the damage and
deformation in the past.
After the concrete examples and problems that the immovable cultural assets should
be protected by a different system, the working areas and stages of the proposal of the
Active / Movable protection model are defined and the logistical support units in the
center are expressed in detail. The formation of the proposed mobile system in terms
of personnel and equipment has been expressed in schematics.
Conditions and maintenance repairs that can be interfered by the new protection
model proposed in the ancient monuments are classified and detailed in stone surfaces,
wooden parts, roof covers, installation, landscaping and environmental regulations.
Ideas on how to integrate the proposed new model with the current system of
protection in Turkey have been developed and expressed in schematics.
In the Recommendations section, the location of the new protection model in the
management hierarchy has been shown in separate schedules, including the Ministry,
the Administration of Foundations and the local governments. For the purpose of
establishing a legal basis, additional article, working regulation and the Supreme
Council for Protection of the Presence of the Cultural and Natural Heritage Protection
Law 5226 are proposed. In addition, the financial dimension of the protection model
has been superseded and specially budgeted. In the conclusion part, a general
evaluation was made under the light of the whole thesis study
Effects of Standard and/or Glutamine Dipeptide and/or Omega-3 Fatty Ascid-Supplemented Parenteral Nutrition on Neutrophil Functions, Interleukin-8 Level and Length of Stay-A Double Blind,Controlled, Randomised Study
Background and Aims: Protein calorie malnutrition for cancer patients is related with altered cellular and humoral immunity. Standard TPN and glutamine and lipid emulsion with omega 3 fatty acids were given to colorectal cancer patients and the effects of these to neutrophil functions and IL-8 levels are compared.Methods: Consecutive 36 patients with colorectal cancer diagnosed with endoscopic biopsy and with malnutrition determined by subjective global assessment were enrolled to study. The patients are randomly divided into four groups. Standard TPN to control group, TPN with glutamine solution to S-D group, TPN with omega 3 fatty acid solution to S-O group and TPN with omega 3 fatty acids solution and glutamine to S-D-O group were given for seven days after the operation. At the preoperative, postoperative first day and 7th day, neutrophil phagocytosis index, neutrophil adhesivity index and IL-8 levels were determined.Results: In all groups compared to control group neutrophil phagocytosis index were increased significantly (p<0.05). The most increasing was in group 3. There wasn’t significant difference between groups about postoperative first day neutrophil adhesiveness index (p>0.05). At the 7th day the neutrophil adhesivity index for study groups were increased compared with control group, but there was no significant differences between groups. There was no significant difference between groups forIL-8 levels.Conclusions: As a result of the study, altered cellular immunity in colorectal cancer patients with malnutrition can be corrected with omega 3 fatty acid emulsions and glutamine added to TPN so the ratio of morbidity and mortality can be decrease
Bound States of Non-Hermitian Quantum Field Theories
The spectrum of the Hermitian Hamiltonian
(), which describes the quantum anharmonic oscillator, is real and
positive. The non-Hermitian quantum-mechanical Hamiltonian , where the coupling constant is real and positive, is
-symmetric. As a consequence, the spectrum of is known to be
real and positive as well. Here, it is shown that there is a significant
difference between these two theories: When is sufficiently small, the
latter Hamiltonian exhibits a two-particle bound state while the former does
not. The bound state persists in the corresponding non-Hermitian -symmetric quantum field theory for all dimensions
but is not present in the conventional Hermitian field theory.Comment: 14 pages, 3figure
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