683 research outputs found
Deformation induced martensite characterization in Fe-30%Ni-5%Cu alloy
Deformation induced martensite properties were examined according to existing martensite morphology, crystallography and formation temperatures for different prior austenite homogenization conditions in Fe-30%Ni-5%Cu alloy. Scanning electron microscope (SEM), differential scanning calorimetry (DSC) and X-ray diffraction (XRD) techniques were employed to investigation. Scanning electron microscope observations showed elongated deformation induced martensite morphology in the austenite phase of alloy. As well, after deformation martensite start temperatures (Ms) were determined as -101ยฐC and -105ยฐC from DSC measurements for different homogenization conditions. In addition, X-ray diffraction analysis revealed the face centred cubic (fcc) of austenite phases and body centred cubic (bcc) deformation induced martensite phases for all studied samples
Geometry Optimization Calculations for the Elasticity of Gold at High Pressure
We present embedded atom method based geometry optimization aspects of pressure effect on some elastic and mechanical properties of gold. During study, we determined the pressure dependency of equilibrium volume, typical cubic elastic constants, bulk modulus, shear modulus, young modulus, and elastic wave velocities of the considered metal with varying pressure between 0 GPa and 1000 GPa. Finally, we carried out a benchmark between our results and other available theoretical calculations and experimental data. The results of the study mutually agree with the previous findings and provide a deeper outlook for high pressure behavior of the studied metal
Effective Strategies for Protecting Human Rights: A Conference Engaging the International Community
Human rights protection needs teeth. And those who work in the disparate field of human rights need to see the system more comprehensively and strategically. Far too often, political issues interfere with enforcement of human rights laws and allow violators to hide behind the unwillingness of national governments to take action to enforce existing laws against human rights violators. Lack of commitment to human rights enforcement or timely preventative or intervention actions have led to violators being left unpunished for torture, rape and genocide. This failure of governments means that there is a lack of deterent power sufficient to inhibit potential human rights violators who know they will not be legally pursued after a conflict has ended
Hamilton-Jacobi quantization of singular Lagrangians with linear velocities
In this paper, constrained Hamiltonian systems with linear velocities are
investigated by using the Hamilton-Jacobi method. We shall consider the
integrablity conditions on the equations of motion and the action function as
well in order to obtain the path integral quantization of singular Lagrangians
with linear velocities.Comment: late
Effects of antimitotic agents on haploid plant production from unpollinated ovules of sugar beet (beta vulgaris l.)
The effects of antimicrotubule agents on haploid embryo formation from unpollinated ovules of sugar beet (Beta vulgaris L.) were investigated. The antimitotic agent colchicine (at 100 and 150 mg/l) and trifluralin (at 5.0 mg/l) increased the frequency of haploid embryo formation whereas pronamide (at 76.9 and 128.2 mg/l) and trifluralin (at 3.4 mg/l) decreased. Ovules that were non-treated with antimicrotuble agents (i.e., ovules of the control treatment) produced higher percentages of haploid embryos (4.25 %) when compared to the pronamide and trifluralin at 3.4 mg/l concentration. Toxic effects of these agents on embryo formation from ovules were evident. A significant genotypic variation among the lines used was observed. The line M4 produced the highest yield with a mean of 14.71% haploid embryo production while the line M2 producing no embryos at all
The prophylactic efficacy of Anatolian propolis in individuals at high risk of COVID-19
OBJECTIVE: No prophylactic
treatment is available for individuals at high risk of
developing COVID-19. This study, which was conducted between December 25, 2020, and January
25, 2021, is one of the first clinical studies to evaluate the efficacy of Anatolian propolis supplement
against COVID-19. The aim was to obtain evidence
on the prophylactic use of Anatolian propolis in individuals at high risk of developing COVID-19.
SUBJECTS AND METHODS: This volunteer-based study was conducted in two centers.
The study involved 209 healthcare professionals (physicians, nurses, medical secretaries) from
Emergency Medicine Department of Medical Faculty of Ataturk University and Emergency Medicine Department of Rize Recep Tayyip Erdogan
University. 204 participants meeting the study criteria were divided into two groups as experimental
group and control group. The experimental group
received 20 drops of BEEโO UP (BEE&YOU) 30%
Propolis drops twice a day during a follow-up period of 1 month. The control group received no
supplement but was followed up. The participants
showing symptoms during the study and all the
participants at the end the study were subjected to
PCR testing.
RESULTS: The evaluation of the results of PCR
testing at the end of the study has shown that 14
participants from the control group and only 2
participants from the experimental group, who received Anatolian propolis supplement, were reported as positive cases.
CONCLUSIONS: It has been found that a
statistically significant protection was induced
against COVID-19 infection in 98% of the experimental group, who received Anatolian propolis,
compared to the control group
A private contributions game for joint replenishment
We study a non-cooperative game for joint replenishment by n firms that operate under an EOQ-like setting. Each firm decides whether to replenish independently or to participate in joint replenishment, and how much to contribute to joint ordering costs in case of participation. Joint replenishment cycle time is set by an intermediary as the lowest cycle time that can be financed with the private contributions of participating firms. We characterize the behavior and outcomes under undominated Nash equilibria. ยฉ Springer-Verlag 2011
Design and analysis of mechanisms for decentralized joint replenishment
We consider jointly replenishing multiple firms that operate under an EOQ like environment in a decentralized, non-cooperative setting. Each firm's demand rate and inventory holding cost rate are private information. We are interested in finding a mechanism that would determine the joint replenishment frequency and allocate the joint ordering costs to these firms based on their reported stand-alone replenishment frequencies (if they were to order independently). We first provide an impossibility result showing that there is no direct mechanism that simultaneously achieves efficiency, incentive compatibility, individual rationality and budget-balance. We then propose a general, two-parameter mechanism in which one parameter is used to determine the joint replenishment frequency, another is used to allocate the order costs based on firmsโ reports. We show that efficiency cannot be achieved in this two-parameter mechanism unless the parameter governing the cost allocation is zero. When the two parameters are same (a single parameter mechanism), we find the equilibrium share levels and corresponding total cost. We finally investigate the effect of this parameter on equilibrium behavior. We show that properly adjusting this parameter leads to mechanisms that are better than other mechanisms suggested earlier in the literature in terms of fairness and efficiency. ยฉ 2016 Elsevier B.V
A Schwarz lemma for K\"ahler affine metrics and the canonical potential of a proper convex cone
This is an account of some aspects of the geometry of K\"ahler affine metrics
based on considering them as smooth metric measure spaces and applying the
comparison geometry of Bakry-Emery Ricci tensors. Such techniques yield a
version for K\"ahler affine metrics of Yau's Schwarz lemma for volume forms. By
a theorem of Cheng and Yau there is a canonical K\"ahler affine Einstein metric
on a proper convex domain, and the Schwarz lemma gives a direct proof of its
uniqueness up to homothety. The potential for this metric is a function
canonically associated to the cone, characterized by the property that its
level sets are hyperbolic affine spheres foliating the cone. It is shown that
for an -dimensional cone a rescaling of the canonical potential is an
-normal barrier function in the sense of interior point methods for conic
programming. It is explained also how to construct from the canonical potential
Monge-Amp\`ere metrics of both Riemannian and Lorentzian signatures, and a mean
curvature zero conical Lagrangian submanifold of the flat para-K\"ahler space.Comment: Minor corrections. References adde
๋ฌธํ์ ์ ์ฒด์ฑ์ ๊ฐ์ง ํ๋ ์ธ๋ผ๋ฏน ๊ฐ๋ฐ์์์ ๋์์ธ-R&D ์ธํฐ๋ ์
The importance of culture and cultural products, which can be said to exist
so long as modern-traditional elements are together, was recognized at
the end of the past century, when the impoverishment of the modern world
had started to be noticed. The issues of tradition and cultural originality were
neglected in Turkey in the process of industrialization in 20th century, and
it was only towards the end of the century that the awareness that cultural
richness is a value to be cherished arose. In the 21st century, various national
and international projects are made in the name of revitalizing the cultural
heritage. However, production in the form of reproduction cannot achieve
cultural continuity. The originals survive but imitations and reproductions are
stillborn. If tradition and culture involve, besides historicity, a yearning for
improvement, then a project of revitalization of historical ceramics would be
able to achieve cultural continuity only by keeping the good qualities and
developing and improving others.
Turkey has a rich and diverse heritage of ceramics culture, thanks to its
geographical position as a natural bridge between Asia, Europe, and the
Middle East. Research conducted in recent years in the ceramics centers of
the country indicates that products of high design and technical quality are
rare. This paper proposes that if Turkey is to revitalize its historical ceramics,
which is an important cultural heritage, with a contemporary-original identity
so that they can inspire new designs, the following are needed:
โข Creation of regional and periodical repertoires of all ceramics work
produced in Turkey from the Neolithic ages to this day, and research into
the products, production technologies, socio-cultural dimensions, and
periodical transitions involved,
โข Imitation of these products to generate scientific knowledge,
โข Re-making of the products with tradition,
โข Contemporary production with some innovation, and
โข Innovative production so that new ceramics products are developed.
These were identified as the steps of a method for designing ceramics with
a cultural identity. Although the products to be created are design products,
the process of their production involves design know-how and artistic and
scientific sensitivity. R&D activities have a direct effect on design quality, and.
๋ฌธํ์ ๋ฌธํ ์ํ์ ์ค์์ฑ์ ํ๋์ -์ ํต์ ์์๊ฐ ๊ณต์กดํ๋ ํ ์กด์ฌํ ๊ฒ์ด๋ผ ๋งํ
์ ์์ผ๋ฉฐ, ์ง๋ ์ธ๊ธฐ๋ง ํ๋ ์ธ๊ณ์ ๋น๊ณค์ด ์ฃผ๋ชฉ๋ฐ๊ธฐ ์์ํ๋ฉด์ ๊ทธ ์ค์์ฑ์ด ์ธ์ ๋์
๋ค. 20์ธ๊ธฐ ์ฐ์
ํ์ ๊ณผ์ ์์ ์ ํต๊ณผ ๋ฌธํ์ ๋
์ฐฝ์ฑ์ด๋ผ๋ ์ด์๋ ํฐํค์์ ๋ฌด์๋์ด
์๋ค. ๋ฌธํ์ ์์ฐ์ด ์์คํ ๊ฐ์น๋ผ๋ ์๊ฐ์ด ์๊ธด ๊ฒ์ ์ง๋ ์ธ๊ธฐ ๋ง๋ถํฐ์๋ค. 21์ธ๊ธฐ์
๋ค์ํ ๊ตญ๋ด์ธ ํ๋ก์ ํธ๊ฐ ๋ฌธํ์ ์ฐ์ ๋ถํ์ด๋ผ๋ ์ด๋ฆ์ผ๋ก ์์๋์๋ค. ๊ทธ๋ฌ๋ ๋ณต์
ํํ์ ์์ฐ์ ๋ฌธํ์ ์์์ฑ์ ์ป์ ์ ์๋ค. ์๋ณธ์ ์ด์๋จ์ง๋ง ์ด๋ฏธํ
์ด์
๊ณผ ๋ณต์ ๋
์ฒ์๋ถํฐ ์คํจ์์ด๋ค. ๋ง์ฝ ์ ํต๊ณผ ๋ฌธํ๊ฐ ์ญ์ฌ์ฑ ์ด์ธ์ ํฅ์์ ์ด๋งํ๋ค๋ฉด, ์ญ์ฌ์ ์ธ
๋ผ๋ฏน์ ๋ถํ ํ๋ก์ ํธ๋, ์ข์ ํ๋ฆฌํฐ๋ ์ ์งํ๋ ๋ค๋ฅธ ํ๋ฆฌํฐ๋ ๋ฐ์ , ํฅ์์์ผ์ผ๋ง ๋ฌธ
ํ์ ์์์ฑ์ ์ป์ ์ ์์ ๊ฒ์ด๋ค.
ํฐํค๋ ์์์, ์ ๋ฝ, ์ค๋์ ์์ฐ์ ๊ต๋์ด๋ผ๋ ์ง๋ฆฌ์ ์์น ๋๋ถ์ ํ๋ถํ๊ณ ๋ค์ํ ์ธ
๋ผ๋ฏน ๋ฌธํ์ ์ฐ์ ๊ฐ์ง๊ณ ์๋ค. ์ต๊ทผ ํฐํค์ ์ธ๋ผ๋ฏน ์ผํฐ์์ ์งํ๋ ์ฐ๊ตฌ๋ ๋์์ธ๊ณผ ๊ธฐ
์ ์ ํ๋ฆฌํฐ๊ฐ ๋์ ์ ํ์ด ๋๋ฌผ๋ค๋ ๊ฒ์ ๋ณด์ฌ์ค๋ค. ์ด ๋
ผ๋ฌธ์ด ์ ์ํ๊ณ ์ ํ๋ ๊ฒ์,
๋ง์ฝ ํฐํค๊ฐ ์ค์ํ ๋ฌธํ์ ์ฐ์ธ ์ญ์ฌ์ ์ธ๋ผ๋ฏน์ ํ๋์ -์ค๋ฆฌ์ง๋ ์์ด๋ดํฐํฐ๋ฅผ ๊ฐ์ง๊ณ
๋ถํ์์ผ ๋ด๋์์ธ์ ์๊ฐ์ ๋ถ์ด๋ฃ๊ณ ์ํ๋ค๋ฉด ๋ค์๊ณผ ๊ฐ์ ๊ฒ์ด ํ์ํ๋ค๋ ๊ฒ์ด๋ค.
โข ์ ์๊ธฐ์๋๋ถํฐ ํ์ฌ๊น์ง ํฐํค์์ ์์ฐ๋ ๋ชจ๋ ์ธ๋ผ๋ฏน ์ํ๋ค์ ์ง์ญ์ , ์ ๊ธฐ์ ๋
ํผํ ๋ฆฌ ์ฐฝ์กฐ์ ๊ทธ์ ๊ด๋ จ๋ ์ ํ, ์ ์ ๊ธฐ์ , ์ฌํ๋ฌธํ์ ํน์ง๊ณผ ์ ๊ธฐ์ ์ธ ๋ณํ์ ๋
ํ ์ฐ๊ตฌ
โข ๊ณผํ์ ์ง์ ์ฐฝ์ถ์ ์ํ ์ด๋ค ์ ํ์ ์ด๋ฏธํ
์ด์
โข ์ ํต์ ์ ํ๋ค์ ๋ฆฌ๋ฉ์ดํน
โข ์๋ก์ด ์ธ๋ผ๋ฏน ๊ฐ๋ฐ์ ์ํ ํ์ ์ ์ธ ์ ์
์ด๋ค์ ๋ฌธํ์ ์ ์ฒด์ฑ์ ๊ฐ์ง ์ธ๋ผ๋ฏน์ ๋์์ธํ๋ ๋ฐฉ๋ฒ์ ๋จ๊ณ๋ค๋ก ์ธ์๋์๋ค. ๋ง๋ค์ด
์ง ์ ํ์ด ๋์์ธ ์ ํ์ด๋ผ ํ๋๋ผ๋ ์ ์ ๊ณผ์ ์ ๋์์ธ ๋
ธํ์ฐ์ ์์ ์ , ๊ณผํ์ ๊ฐ์
์ฑ์ ํฌํจํ๋ค. R&D ํ๋์ ๋์์ธ ํ๋ฆฌํฐ, ๋์์ธ ๊ณผ์ ์ ์ง์ ์ ์ํฅ์ ๋ฏธ์น๋ฉฐ R&D
ํ๋์ ๊ฐ์ด๋ํ๋ค
- โฆ