Neighborhoods and partial sums of certain subclass of starlike functions
The main purpose of the present paper is to derive the neighborhoods and partial sums of a certain subclass of starlike functions. MSC: 30C45.
Materials Literature
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Theoretical study of the stability of Bep@Rbq core-shell clusters
Core-shell structures Ap@Bq can be energetically favored in bimetallic clusters when B has a lower surface energy than A, and p and q are chosen such that a single and complete outer shell of q atoms of B can form around the Ap core. If the difference in the electronegativities of A and B is large, one expects signifi…
SUPERCONDUCTIVITY NEAR POMERANCHUK INSTABILITIES IN THE SPIN CHANNEL
We study the competition between a Pomeranchuk instability in the spin channel with angular momentum ℓ = 1 and an attractive interaction, favoring Cooper-pair formation. We found that the superconducting gap strongly suppresses the phase space for the Pomeranchuk instability. We computed a mean-field phase diagram dis…
Nanoscale Phenomena Occurring during Pyrolysis of Salix viminalis Wood
Selective utilisation of unique properties of Salix viminalis wood enables preparation of materials of nanotechnologic properties. Thermal decomposition of lignin-cellulose organic matter results in the formation of a nanostructured porous carbon matrix (charcoal). Narrowed pore size distribution (PSD) in the subnanom…
Defining Occupational and Consumer Exposure Limits for Nanomaterials – First Experiences from REACH Registrations
By 1 December 2010 substances manufactured or imported in the EU ≥ 1000 t (as well as certain other substances) had to be registered under the REACH Regulation 1907/2006. The Joint Research Centre (JRC) in close cooperation with the European Chemicals Agency (ECHA) carried out an analysis and assessment of what type o…
Interplay of charge and heat transport in a nano-junction in the out-of-equilibrium cotunneling regime
We study the charge transport and heat transfer through a nano-junction composed of a small metallic grain weakly coupled to two metallic leads. We focus on the cotunneling regime out-of-equilibrium, where the bias voltage and the temperature gradient between the leads strongly drive electron and phonon degrees of fre…
Effect of Gezawa Clay on the Properties of Silica Stone for Refractory Brick
The investigations centered on how addition of Gezawa clay (GC) affects the refractory properties of the Gezawa stone (GS) (Silica Stone) with a view to finding the optimum percentage of the blend that will give good refractory properties. The samples were crushed, ground, sieved and the chemical compositions were det…
SURFACE PLASMON EXCITATION AND MANIPULATION IN DISORDERED TWO-DIMENSIONAL NANOPARTICLE ARRAYS
We present experimental and numerical results of simultaneous surface plasmon polariton (SPP) excitation and in-plane manipulation with random arrays of gold nanoparticles. The recorded images were obtained by using leakage radiation microscopy (LRM) for the excitation wavelength of 633 nm and for different densities…
A TEM Investigation of Crack Formation Mechanism on Chrome–Molybdenum Steel Tested under Real Driving Conditions
Many automotive components of gears, power transmissions, and engines are made of chrome molybdenum steel, which has high wear resistance. The life of automobiles depends on the life of such components. In order to extend the life of components, it is important to know the mechanism of wear of metallic parts. Many stu…
Acid Pretreatment of WC-Co for Surface Roughening and Cobalt Removal Prior to CVD Diamond Coating
Chemical vapor deposition (CVD) diamond coatings are being developed to be applied on carbide cutting tools to enhance wear resistance and increase tool life. As a prerequisite, for ensuring adhesion of CVD diamond on tungsten carbide substrate, it is necessary to prepare high surface roughness and to remove the cobal…
ÖSTENİTİK PASLANMAZ ÇELİKLERİN İŞLENMESİNDE KESİCİ TAKIM KAPLAMASININ VE KESME HIZININ KESME KUVVETLERİ VE YÜZEY PÜRÜZLÜLÜĞÜNE ETKİSİ
Bu çalışmada, iki farklı kalitede östenitik paslanmaz çeliğin (AISI 304 ve AISI 316) işlenmesinde, kesici takım kaplamasının, kesme hızının ve iş parçası malzemesinin, kesme kuvvetleri ve yüzey pürüzlülüğü üzerindeki etkilerini incelemek amacıyla soğutma sıvısı kullanılmadan tornalama metoduyla işlenebilirlik deneyler…
Hydrogen- and corrosion-induced defect characterization of ZnO single crystal: A slow positron beam study
Hydrogen- and corrosion-induced microstructure and defects of ZnO single crystal under acidic conditions have been studied by using slow positron beam spectroscopy and microscopy techniques. Slow positron beam measurements revealed that a near-surface damaged region with a high concentration of defects was formed afte…
Charge transport mechanism and low temperature phase transitions in KIO3
Our report deals with the measurement of some electrical properties, namely the ac conductivity σ(ω,T) and the complex dielectric permittivity * (ω, T) in the temperature interval 95K < T < 280K and at some selected frequencies (0.7kHz – 20kHz) for polycrystalline samples of potassium iodate KIO 3 using a computerized…
Micron-Sized Single-Crystal-like CoAPO-5/Carbon Composites Leading to Hierarchical CoAPO-5 with Both Inter- and Intracrystalline Mesoporosity
Commercial mesopores-containing carbon (carbon black BP2000) has been used as crystallization host as well as hard template of intracrystalline mesopores in CoAPO-5 materials prepared with N -methyldicyclohexylamine as specific structure-directing agent. As a result, micrometer-sized AFI-structured terminated-tip (pen…
Fluorescence enhancement by a SiO2-based monolithic waveguide structure for biomolecular detection
We have developed a fluorescence enhancement system for biomolecular detection using a monolithic waveguide sensing plate. The plate consists of a thermally grown amorphous SiO2 layer, a Si single-crystal layer, and bulk amorphous SiO2. Waveguide-mode excitation in this plate produces an enhanced electric field on the…
Organic - Inorganic Hybrid Luminescent Composite for Solid-state Lighting
White light emitting diodes (WLEDs) made by coating organic and inorganic hybrid composites on blue LED chips. Y3Al5O12:Ce (YAG:Ce) nano inorganic powder prepared by low-temperature Sol-Gel method exhibited broad green emission with the peak at 521 nm. Poly[2-methoxy-5-(2'-ethyl-hexyloxy)-1,4-phenylene vinylene] (MEH-…
The social context of nanotechnology and regulating its uncertainty: A nanotechnologist approach
With an increasing number of consumer's products containing nanomaterials (NMs), Nanotechnology is already a reality on the market despite it may only be the emerging part of an iceberg. The potential exponential increase of nanotechnology uses is starting to alert major public bodies due to the uncertainty inherent o…
Formation and Third-Order Optical Nonlinearities of Fractal Ge Nanocrystals Embedded in Au Matrix
Nonequilibrium growth processes of low-dimensional materials have attracted considerable attention, which controlled micro/nanostructures, properties, and various performances of materials. Semiconductor Ge in contact with some metals, e.g., Au, Pd, and Al, etc., is a class of distinctive materials with noninteger dim…
ERGİMİŞ METAL KARIŞTIRMA VE BASINÇLI DÖKÜM YÖNTEMİ İLE ALÜMİNYUM ESASLI TANECİK TAKVİYELİ KOMPOZİTLERİN ÜRETİMİ
Bu çalışmada, metal matriksli kompozit (MMK) malzemelerin, ergimiş metal karıştırma yöntemi ile üretimlerinde karşılaşılan problemlerin azaltılması amaçlanmıştır. Bu amaçla MMK malzemelerin üretimi için argon gazı koruyucu atmosferli ergitme fırını ve karıştırma ünitesi tasarlanarak imalatı yapılmıştır. Tasarlanan üni…
Development of a Surrogate Mixture for Algal-Based Hydrotreated Renewable Diesel
In this study, the chemical composition and physical\nproperties\nof an algal-based hydrotreated renewable diesel (HRD) fuel were used\nto develop a surrogate mixture containing commercially available hydrocarbons.\nAnalysis of the chemical composition of the algal HRD showed a small\nquantity of low-molecular-weight…