bluuebunny/crossref_metadata_2025 huggingface dataset:
Neural network model for video-based face recognition with frames quality assessment
Authors:   M.V. Lomonosov Moscow State University, Nikitin M. , Konushin V. ,   Video Analysis Technologies LLC, Konushin A. ,   M.V. Lomonosov Moscow State University,   National Research University Higher School of Economics
Published: November 2017

This paper addresses a problem of video-based face recognition. We propose a new neural network model that uses an input set of facial images of a person to produce a compact, fixed-dimension descriptor. Our model is composed of two modules. The feature embedding module maps each image onto a feature vector, while the face quality assessment module estimates the utility of each facial image. These feature vectors are weighted based on their utility estimations, resulting in the image set feature representation. During visual analysis we found that our model learns to use more information from high-quality face images and less information from blurred or occluded images. The experiments on YouTube Faces and Janus Benchmark A (IJB-A) datasets show that the proposed feature aggregation method based on face quality assessment consistently outperforms naïve aggregation methods.
Review of the current methods for robust image hashing
Authors:   Academy of the Federal Guard Service, Kozachok A. , Kopylov S. ,   Academy of the Federal Guard Service, Meshcheryakov R. ,   Tomsk State University of Control Systems and Radioelectronics, Evsutin O. ,   Tomsk State University of Control Systems and Radioelectronics
Published: November 2017

The development of an Internet of things concept has led to an essential increase in the amount of data processed via the Internet. Multimedia data constitute a significant proportion of this information. This type of data often contains user’s personal information or copyright protected data. The issue of copyright protection of digital imagery has remained topical for the last decades. Traditional information protection tools cannot provide the required level of image protection from possible threats due to specific features of format representation. This article contains a comparative analysis of published research papers concerned with the robust image hashing as one of possible methods of copyright protection of digital imagery. It also includes a classification of robust image hashing methods, discussing their advantages and drawbacks, and their major characteristics. At the end of the article some directions of further research are outlined.
A method of searching for similar code sequences in executable binary files using a featureless approach
Authors:   Samara National Research University, Yumaganov A. , Myasnikov V. ,   Samara National Research University
Published: November 2017

The work is devoted to solving a problem of searching for similar code sequences in executable binary files. The proposed method involves partitioning the processor instructions into functional groups, forming a given function’s primary description by commands position in its body, followed by generating the function’s intermediate description through its comparison with the functions from a "base" library. With the dimensionality of the resulting vector reduced in this way, the resulting final description is then used to perform the search. Results of the experimental study demonstrate the operability of the proposed method. The efficiency of the proposed method is compared against existing methods of searching for similar code sequences. We also provide recommendations on the choice of parameters of the developed method.
BEHAVIORAL AND CULTURAL ACCOUNTS OF CORRUPTION IN THE INTERFACE BETWEEN PUBLIC OFFICER AND CLIENT
Authors: Agbota Tete Kobla , Sandaker Ingunn , De Carvalho Lucas Couto , Couto Kalliu
Published: November 2017

This paper applies a behavior analytic framework to examine corrupt behavior. With this article, we heed to the call made some decades ago to behavior analysts to extend the interests and strategies of their discipline into domains traditionally assigned to the social sciences. This article has three objectives: First, to examine corruption as behavioral and cultural phenomena; Second is to draw the attention of the social sciences community to the potentials of behavior analytic tools to investigate corrupt behavior; Third, to appeal to behavior analysts to direct some research attention to corruption, which is one of the most critical issues of the twenty-first century.Keywords: corruption, Contingencies, Metacontingencies, Cultural practices, Culture.
DILEMA DO PRISIONEIRO NA ANÁLISE EXPERIMENTAL DO COMPORTAMENTO: UMA REVISÃO SISTEMÁTICA DA LITERATURA
Authors: Fidelis Dafne Pavanelli , Faleiros Pedro Bordini
Published: November 2017

O Dilema do Prisioneiro é um jogo desenvolvido pela Teoria dos Jogos e estabelece um conflito entre “interesses” comuns e individuais. O objetivo do estudo foi realizar uma revisão sistemática de experimentos que utilizaram como procedimento o Dilema do Prisioneiro pautado na Análise Experimental do Comportamento, publicados em periódicos científicos. O procedimento foi composto de cinco etapas: (1) Definição das palavras-chave e seleção dos portais e indexadores de artigos científicos; (2) Busca e seleção dos artigos nos portais e indexadores; (3) Busca e seleção dos artigos em periódicos voltados à publicação em Análise do Comportamento; (4) Seleção das referências encontradas nos artigos lidos; (5) Definição e classificação dos temas. Foram identificados e selecionados 23 artigos. Dois roteiros de estudos foram utilizados para sistematizar as informações. Os estudos que utilizaram o jogo à luz do modelo de seleção do comportamento pelas consequências manipularam variáveis relacionadas às relações sociais, autocontrole e metacontingências. A relação entre o Dilema do Prisioneiro e a análise experimental do comportamento tem sido acentuada nas últimas décadas, o que sugere um aumento e continuidade de estudos nessa área.Palavras-chave: dilema do prisioneiro, análise experimental do comportamento, autocontrole, metacontingências, comportamento social.
La forma del invernadero contemporáneo y la incidencia de la luz solar
Authors: Sanz Sánchez María
Published: November 2017

La incidencia de la luz es uno de los aspectos más importantes en el diseño de un invernadero, debido a su función de recrear en su interior un clima diferente al de la latitud en la que se encuentra. Sin embargo, aunque pueda parecer que éste es el factor determinante en la configuración formal de un invernadero, como en todo edificio, existen otros muchos parámetros a considerar. En este artículo se analizan tres invernaderos de referencia posteriores a la Segunda Guerra Mundial, y se observan los aspectos que, en cada caso, han predominado sobre la que sería la forma ideal en lo que respecta a la incidencia de la luz solar. En el primer invernadero, la cuestión se centrará en la imposición de una forma y sistema estructural concretos, en el segundo, en la composición dinámica del conjunto, y en el tercero, en la integración del invernadero en su emplazamiento. Los tres casos tienen en común el compromiso que presenta su solución entre unos y otros parámetros.
La recuperación instrumental de la Historia en el Pre-Columbian Pavilion de Dumbarton Oaks
Authors: Pico Valimaña Ramón
Published: November 2017

En el contexto de la revisión crítica de la modernidad arquitectónica que se produjo en los cincuenta Philip Johnson destacó como activo defensor de la recuperación instrumental de la Historia. El pabellón para la ampliación del Museo de Dumbarton Oaks constituye en este sentido una pieza clave, olvidada o temida por la crítica, y en la que su contacto con Mildred Bliss resultaría decisiva. En este trabajo se analiza esta obra y las vicisitudes de su creación.
A Simple Method to Measure Renal Function in Swine by the Plasma Clearance of Iohexol
Authors: Luis-Lima Sergio , Garcia-Contreras Consolación , Vazquez-Gomez Marta , Astiz Susana , Carrara Fabiola , Gaspari Flavio , Negrin-Mena Natalia , Jiménez-Sosa Alejandro , Jiménez-Hernández Hugo , Gonzalez-Bulnes Antonio , Porrini Esteban
Published: November 2017

There is no simple method to measure glomerular filtration rate (GFR) in swine, an established model to study renal disease. We developed a protocol to measure GFR in conscious swine with the plasma clearance of iohexol. We used two groups: testing and validation, of 8 animals each. Ten milliliters of iohexol (6.47 g) were injected by the marginal auricular vein and blood samples (3 ml) were collected from the orbital sinus at different points after injection. GFR was determined considering two models: two-compartments (CL2: all samples) and one-compartment (CL1: the last six samples). In the testing group, CL1 overestimated CL2 by ~30%: CL2=245±93 and CL1=308±123 ml/mn. This error was corrected by a first order polynomial quadratic equation to CL1, which was considered the simplified method: SM=-47.909+(1.176xCL1)–(0.00063968xCL12). SM showed narrow limits of agreement with CL2, and a concordance correlation of 0.97 and a total deviation index of 14.73%. Similar results were obtained for the validation group. This protocol is reliable, reproducible, can be performed in conscious animals, uses a single dose of the marker, and requires a reduced number of samples avoiding urine collection. Finally, it portends a significant improvement in animal-welfare conditions and handling necessities in experimental trials.
Active Prior Tactile Knowledge Transfer for Learning Tactual Properties of New Objects
Authors: Feng Di , Kaboli Mohsen , Cheng Gordon
Published: November 2017

Reusing the tactile knowledge of some previously explored objects helps us to easily recognize the tactual properties of new objects. In this paper, we enable a robotic arm equipped with multi-modal artificial skin, like humans, to actively transfer the prior tactile exploratory action experiences when it learns the detailed physical properties of new objects. These experiences, or prior tactile knowledge, are built by the feature observations that the robot perceives from multiple sensory modalities, when it applies the pressing, sliding, and static contact movements on objects with different action parameters. We call our method Active Prior Tactile Knowledge Transfer (APTKT), and systematically evaluated its performance by several experiments. Results show that the robot improved the discrimination accuracy by around 10% when it used only one training sample plus the feature observations of prior objects. By incorporating the auxiliary features, the transfer learning improved the discrimination accuracy by over 20%. The results also show that the proposed method is robust against transferring irrelevant prior tactile knowledge (negative knowledge transfer).
Plants of the Genus Zingiber as Source of Antimicrobial Agents: from Tradition to Pharmacy
Authors: Sharifi-Rad Mehdi , Varoni Elena Maria , Salehi Bahare , Sharifi-Rad Javad , Matthews Karl R. , Ayatollahi Seyed Abdulmajid , Kobarfard Farzad , Ibrahim Salam A. , Mnayer Dima , Zakaria Zainul Amiruddin , Sharifi-Rad Majid , Yousaf Zubaida , Iriti Marcello , Basile Adriana , Rigano Daniela
Published: November 2017

Plants of the genus Zingiber (Family Zingiberaceae) are widely used throughout the world as food and medicinal plants. They represent very popular herbal remedies in various traditional healing systems; in particular, rhizome of Zingiber spp. plants has a long history of ethnobotanical uses because of a plethora of curative properties. Antimicrobial activity of rhizome essential oil has been extensively confirmed in vitro and attributed to its chemical components, mainly consisting in monoterpene and sesquiterpene hydrocarbons such as α-zingiberene, ar-curcumene, β-bisabolene and β-sesquiphellandrene. In addition, gingerols have been identified as the major active components in the fresh rhizome, whereas shogaols, dehydrated gingerol derivatives, are the predominant pungent constituents in dried rhizome. Zingiber spp. may thus represent a promising and innovative source of natural alternatives to chemical food preservatives. This approach would meet the increasing concern of consumers aware of the potential health risks associated with the conventional antimicrobial agents in food. This narrative review aims providing a literature overview on Zingiber spp. plants, their cultivation, traditional uses, phytochemical constituents and biological activities.
Effect of the Chemical Composition of Mesoporous Cerium-Zirconium Oxides on the Modification with Sulfur and Gold Species and Their Application in Glycerol Oxidation
Authors: Kaminski Piotr
Published: November 2017

Ceria, zirconia and mixed cerium-zirconium mesoporous oxides were synthesized and used as supports for sulfur and gold species. The materials were characterised using selected advanced techniques (ICP-OES, elemental analysis, XPS, XRD, N2 adsorption and desorption isotherms, UV-vis, ATR-FTIR, TPR-H2, TG-DTA) which allowed monitoring of the oxidation state of metals (cerium and gold) and the surface properties of the catalysts, in particular the concentration of the components on the surface and in the bulk of materials. The interactions between gold, sulfur and metals from oxides were considered. The goal of this work was studied the changes in the chemical composition of materials and the oxidation states of cerium species after the modification of oxides with sulfur and gold species and the estimation of the influence of these changes on the surface properties. The chemical composition of surface affects the mobility of surface oxygen and the oxidation state of cerium, which can play the role of redox sites (e.g. Ce3+/Ce4+ species), and therefore it strongly influences on the adsorption of hydrogen sulfide and then gold loading. Additionally, gold catalysts modified with sulfur species were tested in the reaction of glycerol oxidation in the liquid phase at basic conditions as the test reaction of the catalytic oxidation of organic pollutants from water.
The Sales Behavior Analysis and Precise Marketing Recommendations of FMCG Retails Based on Geography Methods
Authors: Wang Luyao , Fan Hong , Gong Tianren
Published: November 2017

With the rapidly increasing of people’s purchasing power, the fast moving consumer goods (FMCG) industry is supposed to grow dramatically. In order to gain more market access and profile, it is important for the FMCG manufacturers and retailers to find the preferences and provincial characteristics of consumers, to develop more suitable goods distribution strategy. Based on retails marketing data with geographic characteristics, this paper proposes a new combination of geography methods to solve the problems in distribution of FMCG. Via multiple K-means clustering and cross validation of KNN half off, the mesoscopic sales features are extracted through the classification of retails, which can indirectly grasp the consumer behavior characteristics. Based on space division and Moran’ I spatial autocorrelation arithmetic, two strategies are developed to satisfy consumer’s needs and promote sales, including conservative and positive strategies. According to our analysis, the total sales volume of the regions will increase by 5.1% and 10.3%. This study can be applied to the provide purchase strategies for FMCG retails according to their locations. The research can explore the consumption potential of different areas, thus improving the profile of retails and the development of economy in more mesoscopic scale.
Time-Series Data Analysis Using Sliding Window Based SVD for Motion Evaluation
Authors: Jiang Yinlai , Hayashi Isao , Wang Shuoyu , Ishida Kenji ,   The University of Electro-Communications Chofu, Tokyo 182-8585, Japan,   Kansai University Takatsuki, Osaka 569-1095, Japan,   Kochi University of Technology Kami, Kochi 782-8502, Japan,   Kurihara Central Hospital Kurihara, Miyagi 987-2205, Japan
Published: November 2017

A method based on singular value decomposition (SVD) is proposed for extracting features from motion time-series data observed with various sensing systems. Matrices consisting of the sliding window (SW) subsets of time-series data are decomposed, yielding singular vectors as the patterns of the motion, and the singular values as a scalar, by which the corresponding singular vectors describe the matrices.

The sliding window based singular value decomposition was applied to analyze acceleration during walking. Three levels of walking difficulty were simulated by restricting the right knee joint in the measurement. The accelerations of the middles of the shanks and the back of the waist were measured and normalized before the SW-SVD was performed.The results showed that the first singular values inferred from the acceleration data of the restricted side (the right shank) significantly related to the increase of the restriction among all the subjects while there were no common trends in the singular values of the left shank and the waist. The SW-SVD was suggested to be a reliable method to evaluate walking disability. Furthermore, a 2D visualization tool is proposed to provide intuitive information about walking difficulty which can be used in walking rehabilitation to monitor recovery.
Evaluation and Determination of Tensile Force of Saffron Flower for Mechanical Harvesting
Authors: Mazloumzadeh Meisam
Published: November 2017

According to the production of more than 90% of saffron in Iran, any study in order to progress in the field of mechanical harvesting and increase the quality of this product, seems to be logical and economical. Mechanical harvesting of saffron is needed to determine the required force for picking. Therefore, picking force of flowers was carried out in three different fields. In each field, the measurement was performed for 10 flowers by appropriateequipment. The results showed that the average force required for picking the flowers which was around 0.8N. Picking force for saffron leaves were performed in three replications in the fields for 2 and 6 years. The results showed that the force depended on several factors: the type of irrigation water, soil type and saffron farm life. Average tensile force in the second year and in the sixth year was about of 3N and 8N.
Implementasi Algoritma Penjadwalan untuk pengelolaan Big Data dengan Hadoop
Authors: Prabowo Sidik
Published: November 2017

Paper ini mengusulkan skema scheduler hadoop pada penyelesaikan tipe job yang sesuai untuk peningkatan kinerja Hadoop. Kesesuaian jenis scheduler dan tipe job yang dikerjakan dapat meningkatkan throughput dan menurunkan waktu rata-rata penyelesaian job. Masalah utama pada eksekusi job adalah ketidaksesuaian antara scheduler dengan tipe job yang dikerjakan. Pada paper ini telah dilakukan pengujian terhadap beberapa algoritma scheduler Hadoop yaitu FIFO, Fair, SARS dan COSHH scheduler dengan beberapa jenis job yang ditangani dalam lingkungan hadoop. Jenis-jenis job yang diujikan adalah word count, random text writer dan grep. Pengujian dilakukan dua skenario, yaitu job homogen (satu jenis) dan heterogen (beberapa jenis job) dikerjakan bersama. Hasil pengujian menunjukan bahwa algoritma SARS cocok digunakan pada penyelesaian job yang sifatnya homogen. Sementara itu algoritma COSHH cocok digunakan pada penyelesaian job gabungan yang heterogen. 
A Semianalytical Methodology for Pressure-Transient Analysis of Multiwell-Pad-Production Scheme in Shale Gas Reservoirs, Part 1: New Insights Into Flow Regimes and Multiwell Interference
Authors: Xiao Cong , Dai Yu , Tian Leng , Lin Haixiang , Zhang Yayun , Yang Yaokun , Hou Tengfei , Deng Ya
Published: November 2017

Recently, a multiwell-pad-production (MWPP) scheme has been the center of attention as a promising technology to improve shale-gas (SG) recovery. However, the increasing possibility of multiwell pressure interference (MWPI) in the MWPP scheme severely distorts flow regimes, which strongly challenges the traditional pressure-transient analysis methods that focus on single multifractured horizontal wells (SMFHWs) without MWPI. Therefore, a methodology to identify pressure-transient response of the MWPP scheme with and without MWPI is urgent. To fill this gap, a new semianalytical pressure-transient model of the MWPP scheme is established by use of superposition theory, Gauss elimination, and the Stehfest numerical algorithm. Type curves are generated, and flow regimes are identified by considering MWPI. Finally, a sensitivity analysis is conducted.

Our results show that there are good agreements between our proposed model and numerical simulation; moreover, our semianalytical approach also demonstrates a promising calculation speed compared with numerical simulation. Some expected flow regimes are significantly distorted by MWPI. In addition, well rate determines the distortion of pressure curves, whereas fracture length, well spacing, and fracture spacing determine when the MWPI occurs. The smaller the gas rate, the more severely flow regimes are distorted. As the well spacing increases, fracture length decreases, fracture spacing decreases, and the occurrence of MWPI occurs later. The stress-sensitivity coefficient has little to no influence on the occurrence of MWPI. Similar to the concept of the dual-porosity model, three new flow regimes—the single-well flow regime, MWPI flow regime, and MWPP flow regime—are artificially defined to systematically characterize the flow regimes of the MWPP scheme.

This work offers some additional insights on pressure-transient response for the MWPP scheme in the SG reservoir, which can provide considerable guidance for fracture-properties estimation and well-pattern optimization for the MWPP scheme.
Posicionamiento del patrimonio en cooperativas de intermediación financiera frente a las NIIF sobre instrumentos financieros
Authors: Martínez Batista Francisco
Published: November 2017

Esta investigación tiene un diseño no experimental y transeccional, se enfoca en analizar el posicionamiento patrimonial de las cooperativas de intermediación financiera (I.F.) frente a las aportaciones de sus asociados. Inicia con planteamientos teóricos de normativa contable internacional y local, la relación del Activo total invertido versus el Pasivo, Patrimonio y Aportaciones. El Estudio de Caso analizó cifras del Balance de Situación, las diferencias reales, bajo la incertidumbre de la norma plena. Los resultados arrojan desmejoramiento patrimonial de 14.8% y endeudamiento general por el mismo orden.  En el Estudio de Caso la situación real, versus la norma plena, y considerando el Capital mínimo irreducible de Aportaciones, igual disminuye el Patrimonio en 10.2% y aumenta los Pasivos Financieros en 10.2%. En conclusión, se considera usar alguna estrategia que solvente la situación de la normativa contable internacional con las nacionales que converjan en beneficio de las cooperativas.
La demanda de huevos de codorniz en empresas hoteleras guayaquileñas
Authors: Soto-Galarza Ingrid Angelina , Estévez-Torres Zoe Elisabeth
Published: November 2017

Para identificar una demanda potencial de huevos de codorniz en los hoteles de Guayaquil, se realizó un estudio cuantitativo utilizando la metodología de la encuesta. La muestra obtenida fue de 40 personas, de una base de datos de 250 hoteles. Se realizaron pruebas de hipótesis de proporciones sobre diversas variables de interés como el precio y la cantidad demandada, entre otras, con el fin de comprobar la sospecha de que debía existir una alta demanda de huevos de codorniz prelaborados si el producto se ofertara en los hoteles. Se obtuvieron gráficas y tablas de frecuencias, una matriz de correlación, un modelo de regresión para obtener la cantidad diaria de consumo y, por último, se realizó una evaluación del modelo que permitió determinar una demanda diaria insatisfecha en los hoteles de 3 584, equivalente a 107 520 huevos de codorniz cocidos y pelados mensuales, cifra que se vuelve atractiva para el sector coturnicultor.
Two Elution Mechanisms of MEP Chromatography
Authors: Arakawa Tsutomu , Tokunaga Masao , Maruyama Takuya , Shiraki Kentaro
Published: November 2017

MEP (mercapto-ethyl-pyridine) HyperCel is one of the hydrophobic charge induction chromatography
(HCIC) resins. Under normal operation, proteins are bound to the MEP resin at neutral pH,
at which MEP is not charged, mostly via hydrophobic interaction. MEP has a pyridine group, whose pK
is 4.8, and hence is positively charged at acidic pH range. Based on the binding mechanism (i.e., hydrophobic
interaction) and the induced positive charge at acidic pH, there may be two ways to elute the
bound proteins. One way is to bring the pH down to protonate both MEP resin and the bound protein,
leading to charge repulsion and thereby elution. Another way is to use hydrophobic interaction modifiers,
which are often used in hydrophobic interaction chromatography, to reduce hydrophobic interaction.
Here, we summarize such two possible elution approaches.
Stroke and Hypertension: An Appraisal from Pathophysiology to Clinical Practice
Authors: Buonacera Agata , Stancanelli Benedetta , Malatino Lorenzo
Published: November 2017

Stroke as a cause of long-term disability is a growing public health burden. Therefore, focusing on prevention is important. The most prominent aim of this strategy is to treat modifiable risk factors, such as arterial hypertension, the leading modifiable contributor to stroke. Thus, efforts to adequately reduce Blood Pressure (BP) among hypertensives are mandatory. In this respect, although safety and benefits of BP control related to long-term outcome have been largely demonstrated, there are open questions that remain to be addressed, such as optimal timing to initiate BP reduction and BP goals to be targeted. Moreover, evidence on antihypertensive treatment during the acute phase of stroke or BP management in specific categories (i.e. patients with carotid stenosis and post-acute stroke) remain controversial.  This review provides a critical update on the current knowledge concerning BP management and stroke pathophysiology in patients who are either at risk for stroke or who experienced stroke.
Renal Dysfunction Following Elective Endovascular Aortic Aneurysm Repair
Authors: Radak Djodje , Neskovic Mihailo , Otasevic Petar , Isenovic Esma R.
Published: November 2017

Abdominal aortic aneurysm (AAA) is a degenerative disease of the
aortic wall with potentially fatal complications. Open repair (OR) was
considered the gold standard, until the emergence of endovascular aneurysm
repair (EVAR), which is less invasive and equally (if not more) effective.
As the popularity of endovascular procedures grows, related complications
become more evident, with kidney damage being one of them. Although acute
kidney injury (AKI) following EVAR is relatively common, its true incidence
is still uncertain. Also, there is insufficient data concerning long-term
renal outcomes after EVAR, especially with repeated contrast agent exposure.
Despite the lack of firm evidence on the effectiveness of individual
strategies, it is evident that prevention of AKI following EVAR requires a
multifactorial approach. This review focuses on recent findings based on
human studies regarding the current evidence of renal impairment after EVAR,
its quantification and strategies for its prevention.
Architectures and Mechanical Properties of Drugs and Complexes of Surface-Active Compounds at Air-Water and Oil-Water Interfaces
Authors: Sarker Dipak K.
Published: November 2017

Background:

Drugs can represent a multitude of compounds from proteins and peptides,
such as growth hormones and insulin and on to simple organic molecules such as flurbiprofen,
ibuprofen and lidocaine. Given the chemical nature of these compounds two features are always
present. A portion or portions of the molecule that has little affinity for apolar surfaces and media
and on the contrary a series of part or one large part that has considerable affinity for hydrophilic,
polar or charged media and surfaces. A series of techniques are routinely used to probe the
molecular interactions that can arise between components, such as the drug, a range of surface–
active excipients and flavor compounds, for example terpenoids and the solvent or dispersion
medium.

Results:

Fifty-eight papers were included in the review, a large number (16) being of theoretical nature
and an equally large number (14) directly pertaining to medicine and pharmacy; alongside experimental
data and phenomenological modelling. The review therefore simultaneously represents an amalgam of
review article and research paper with routinely used or established (10) and well-reported
methodologies (also included in the citations within the review). Experimental data included from
various sources as diverse as foam micro-conductivity, interferometric measurements of surface
adsorbates and laser fluorescence spectroscopy (FRAP) are used to indicate the complexity and utility
of foams and surface soft matter structures for a range of purposes but specifically, here for
encapsulation and incorporation of therapeutics actives (pharmaceutical molecules, vaccines and
excipients used in medicaments). Techniques such as interfacial tensiometry, interfacial rheology
(viscosity, elasticity and visco-elasticity) and nanoparticle particle size (hydrodynamic diameter) and
charge measurements (zeta potential), in addition to atomic force and scanning electron microscopy
have proven to be very useful in understanding how such elemental components combine, link or
replace one another (competitive displacement). They have also proven to be both beneficial and
worthwhile in the sense of quantifying the unseen actions and interplay of adsorbed molecules and the
macroscopic effects, such as froth formation, creaming or sedimentation that can occur as a result of
these interactions.

Conclusion:

The disclosures and evaluations presented in this review confirm the importance of a
theoretical understanding of a complex model of the molecular interactions, network and present a
framework for the understanding of really very complex physical forms. Future therapeutic
developers rely on an understanding of such complexity to garner a route to a more successful
administration and formulation of a new generation of therapeutic delivery systems for use in
medicine.
Forced Degradation Study for Tenofovir DF, Lamivudine and Efavirenz in Triple Combination Anti-Retroviral Tablets and Development of Validated Stability Indicating Assay Method by UPLC
Authors: Murali Krishna Mantripragada V.V.N. , Rao Sumathi Vinay , Venugopal Nutulapati V.S.
Published: November 2017

Introduction:

Tenofovir Disoproxil Fumarate/Lamivudine/Efavirenz Tablets are a pharmaceutical
dosage form indicated for the treatment of Human Immunodeficiency Virus (HIV) infection.

Methods:

A simple, time efficient and stability indicating Reverse Phase Ultra Performance Liquid
Chromatography (RP – UPLC) method was developed for the simultaneous determination of the three
drugs present in the tablets. Mobile phase-A is 0.1% Trifluoro Acetic acid in water and mobile phase-B
is acetonitrile in gradient elution mode. Flow rate at 0.4 mL/min was fixed in the method. Acquity BEH
Phenyl (100 mm × 2.1 mm), 1.7 µ column was used for the separation of analytes at 260 nm wavelength.
The developed method has been validated as specified in International Conference on Harmonization
(ICH) guideline. Forced degradation study was conducted for Tenofovir Disoproxil fumarate
(TDF), Lamivudine (LAM) and Efavirenz (EFA) pharmaceutical tablets to identify the degradation
behaviour of individual drugs under stress study.

Results:

The method was observed to be linear from 6-90 µg/mL concentration for TDF & LAM and
12-180 µg/mL for EFA with correlation coefficient values of more than 0.999. The method was found
to be precise with RSD (Relative standard deviation) values of below 2% for replicate measurements.
Recovery results were found to be between 99.0 and 100.8%. LOQ values for TDF, LAM & EFA were
0.041 µg/mL, 0.034 µg/mL & 0.053 µg/mL, respectively. Specificity of the analytical method was
checked by injecting the stressed samples and evaluating the homogeneity of peaks using Photo Diode
Array (PDA) detector. Peak purity results indicated that no interference was observed from degradation
impurities for the quantification of TDF, LAM and EFA in the dosage form. The method was found to
be robust under the deliberately modified chromatographic parameters.

Conclusion:

The developed UPLC method is stability indicating, successfully validated and suitable for
quantification purpose.
Olive Oil-related Anti-inflammatory Effects on Atherosclerosis: Potential Clinical Implications
Authors: Wongwarawipat Tanakal , Papageorgiou Nikolaos , Bertsias Dimitrios , Siasos Gerasimos , Tousoulis Dimitris
Published: November 2017

Background and Objective:

Atherosclerosis is characterized by a chronic low-grade inflammatory
process which can result in atherothrombosis and a number of cardiovascular diseases
(CVD). It is believed to be caused by multiple processes that involve inflammation and immunity.
Mediterranean Diet (MedD) has been discovered to possess anti-inflammatory properties and associated
with a reduction in the CVD risk and mortality. Its main component, extra-virgin olive oil
(EVOO), is believed to be largely responsible for these effects and therefore, has been investigated in
various studies. The present review article aims to summarize the available literature on the antiinflammatory
and cardio-protective effects of EVOO.

Methods:

A search based on the key concepts “olive oil”, “atherosclerosis”, “inflammation” and “cardiovascular
disease” was performed to retrieve relevant studies and articles on the association between
the consumption of EVOO and the levels of inflammatory biomarkers as well as CVD incidence and
mortality from online databases; Pubmed, Embase and Cochrane Library.

Results:

Consumption of EVOO is associated with a reduction in inflammatory biomarkers and molecules
implicated in atherosclerosis as well as CVD incidence and mortality as well as other complications
such as heart failure and atrial fibrillation. Moreover, these anti-inflammatory and
cardioprotective effects of EVOO are mostly attributable to its high content of polyphenol molecules.

Conclusion:

Currently available evidence supports the anti-inflammatory and cardio-protective roles
of EVOO. However, there is limited amount of available randomized controlled trials especially lacking
those investigating the use of EVOO as secondary prevention, heterogeneity of study design, limited
generalization to wide population groups, and inability to determine the minimum intake of EVOO
required to clinically achieve the anti-inflammatory and cardioprotective effects. Therefore, more highquality
randomized controlled trials still need to be carried out to overcome these challenges to further
assess the health benefits of EVOO consumption and potentially translate it into clinical practice as
primary or secondary prevention of atherosclerosis-related conditions.
Experiment Research on the Inverse Presumption Method to Evaluate Peak Temperature for Post-fire Spatial Structure
Authors: Cui Jing , Yin Lingfeng , Guo Xiaoming , Tang Gan
Published: November 2017

Introduction:

The peak temperature is one of the most important factors to evaluate the structural damage. Due to the reduction in the tensile strength of the steel, the structural stress is redistributed and the bearing capacity is decreased at the elevated temperature.

Methods:

This paper presents an inverse method to evaluate the peak temperature for the steel structures subjected to fire. An initial temperature field is assumed based on the post-fire structural residual displacement, and a temperature iteration function is developed to approach the peak temperature of the structure in fire by minimizing the difference between the measured and numerical results. An experimental study was conducted to investigate the structural behavior of a spatial structure subjected to fire. The temperature and displacement data were recorded.

Result and Conclusion:

Results show that the measured results have a good agreement with the predicted results, demonstrating that the proposed method in this paper is available for evaluate the peak temperature with a desirable accuracy. The inverse method of the temperature field can provide a theoretical basis for scientifically evaluating the residual displacements of the post-fire structure and formulating reliable repair and reinforcement schemes.
Зонный спектр в гетероструктурах HgTe/CdHgTe p-типа и его перестройка с изменением температуры
Authors: Иконников А.В. , Бовкун Л.С. , Румянцев В.В. , Криштопенко С.С. , Алешкин В.Я. , Кадыков А.М. , Orlita M. , Potemski M. , Гавриленко В.И. , Морозов С.В. , Дворецкий С.А. , Михайлов Н.Н.
Published: November 2017

Выполнены исследования спектров магнитопоглощения и спектров межзонной фотопроводимости при различных температурах в квантовых ямах HgTe/CdHgTe с дырочным типом проводимости. Показано, что в образце с нормальной зонной структурой наблюдается сдвиг положения красной границы в сторону больших энергий с ростом температуры, что указывает на увеличение ширины запрещенной зоны в квантовой яме. В образце с инвертированной структурой впервые наблюдалось смещение красной границы в сторону меньших энергий, связанное с топологическим фазовым переходом от инвертированной зонной структуры к прямой с увеличением температуры. Результаты экспериментальных исследований находятся в согласии с теоретическими расчетами зонной структуры, выполненными на основе модели Кейна. DOI: 10.21883/FTP.2017.12.45168.30
Эффективная масса и g-фактор электронов в широких квантовых ямах теллурида ртути -=SUP=-*-=/SUP=-
Authors: Гудина С.В. , Неверов В.Н. , Ильченко Е.В. , Боголюбский А.С. , Харус Г.И. , Шелушинина Н.Г. , Подгорных С.М. , Якунин М.В. , Михайлов Н.Н. , Дворецкий С.А.
Published: November 2017

Измерены магнитополевые (0<B<9 Тл) зависимости продольного и холловского сопротивлений при фиксированных температурах (2<T<50 K) для системы HgCdTe/HgTe/HgCdTe с квантовой ямой HgTe шириной 20.3 нм. Активационный анализ кривых магнитосопротивления был использован в качестве инструмента для определения щелей подвижности между соседними уровнями Ландау. Значения энергии активации, полученные из температурных зависимостей продольного сопротивления в областях плато квантового эффекта Холла с факторами заполнения v=1,2,3, позволили сделать оценки эффективной массы и g-фактора электронов в исследуемой системе. Получены указания на возможность больших значений g-фактора (=~80). DOI: 10.21883/FTP.2017.12.45176.39
Single electron transistor: energy-level broadening effect and thermionic contribution
Authors: Nasri A. , Boubaker A. , Khaldi W. , Hafsi B. , Kalboussi A.
Published: November 2017

In this paper, a theoretical study of single electron transistor (SET) based on silicon quantum dot (Si-QD) has been studied. We have used a novel approach based on the orthodox theory. We studied the energy-level broadening effect on the performance of the SET, where the tunnel resistance depends on the discrete energy. We have investigated the I-V curves, taking into account the effects of the energy-level broadening, temperature and bias voltage. The presence of Coulomb blockade phenomena and its role to obtain the negative differential resistance (NDR) have been also outlined. DOI: 10.21883/FTP.2017.12.45191.8239
Лазерно-индуцированная генерация поверхностных периодических структур в средах с нелинейной диффузией
Authors: Журавлев В.М. , Золотовский И.О. , Коробко Д.А. , Морозов В.М. , Светухин В.В. , Явтушенко И.О. , Явтушенко М.С.
Published: November 2017

Предложена модель быстрого формирования высококонтрастной периодической структуры, возникающей на поверхности полупроводника под действием лазерного излучения. В рамках модели среды с нелинейной диффузией неравновесных носителей (дефектов) рассмотрен процесс вырастания поверхностной структуры за счет взаимодействия поверхностных плазмон-поляритонов, возбуждаемых на неравновесных электронах, с падающим лазерным излучением. Предсказан резонансный эффект сверхбыстрого пико- и субпикосекундного усиления генерируемой на поверхности плазмон-поляритонной структуры, при реализации которого может быть получена высококонтрастная решетка дефектов. Работа выполнена при поддержке Министерства образования и науки Российской Федерации (проект N 14.Z50.31.0015) и Российского фонда фундаментальных исследований (проект N 16-42-730398). DOI: 10.21883/FTT.2017.12.45222.026
Высокотемпературная теплоемкость титанатов самария и эрбия со структурой пирохлора
Authors: Денисова Л.Т. , Чумилина Л.Г. , Денисов В.М. , Рябов В.В.
Published: November 2017

Методом твердофазного синтеза на воздухе из стехиометрических смесей Sm2O3(Er2O3)-TiO2 последовательно при температурах 1673 и 1773 K получены титанаты Sm2Ti2O7 и Er2Ti2O7 со структурой пирохлора. Методом дифференциальной сканирующей калориметрии измерена высокотемпературная теплоемкость оксидных соединений. По экспериментальным зависимостям Cp=f(T) рассчитаны их термодинамические свойства. Работа выполнена при финансовой поддержке работ, выполняемых в рамках Государственного задания Министерства образования и науки Российской Федерации Сибирскому федеральному университету на 2017-2019 (проект 4.8083.2017/БЧ Формирование банка данных термодинамических характеристик сложнооксидных полифункциональных материалов, содержащих редкие и рассеянные элементы"). DOI: 10.21883/FTT.2017.12.45223.122
Температурная эволюция функции диэлектрического отклика релаксорной керамики Pb(Fe-=SUB=-0.95-=/SUB=-Sc-=SUB=-0.05-=/SUB=-)-=SUB=-2/3-=/SUB=-W-=SUB=-1/3-=/SUB=-O-=SUB=-3-=/SUB=- в широком частотном диапазоне
Authors: Командин Г.А. , Породинков О.Е. , Буш А.А. , Королева А.Ф. , Спектор И.Е. , Чучупал С.В. , Серегин Д.С. , Исхакова Л.Д.
Published: November 2017

Исследованы электродинамические характеристики твердого раствора Pb(Fe0.95Sc0.05)2/3W1/3O3, представителя структурного семейства перовскитов A(B'B'')O3, методом широкополосной диэлектрической спектроскопии в диапазоне волновых чисел (4·10-9-4·103) cm-1 в интервале температур 100-600 K. В рамках четырехпараметрической факторизованной модели дисперсии определено влияние низкочастотных релаксаций на колебательный спектр. Обнаружены аномалии в поведении функции диэлектрического отклика в области размытого по температуре максимума диэлектрической проницаемости. Грант РФФИ 16-02-00223, проект N 3.1099.2017/ПЧ по госзаданию Министерства образования и науки РФ. DOI: 10.21883/FTT.2017.12.45229.151
Оптические свойства объемных монокристаллов нитрида галлия, выращенных методом хлорид-гидридной газофазной эпитаксии
Authors: Агекян В.Ф. , Борисов Е.В. , Серов A.Ю. , Философов Н.Г.
Published: November 2017

Кристалл нитрида галлия толщиной 5 mm был выращен методом хлорид-гидридной газофазной эпитаксии на сапфировой подложке, от которой кристалл отделился в процессе остывания. На ранней стадии был реализован трехмерный режим роста с последующей сменой на двумерный режим. В нескольких характерных областях образца исследованы спектры экситонного отражения, экситонной люминесценции и рамановского рассеяния. Анализ этих спектров и сравнение с ранее полученными данными для тонких эпитаксиальных слоев GaN с широким диапазоном легирования кремнием позволили сделать выводы о качестве кристаллической решетки в этих характерных областях образца. Работа выполнена в рамках инициативной темы СПбГУ N 11.52.454.2016, для исследования спектров рамановского рассеяния использовалось оборудование Ресурсного центра СПбГУ "Оптические и лазерные методы исследования вещества". DOI: 10.21883/FTT.2017.12.45237.120
ИК-спектры углерод-вакансионных кластеров при топохимическом превращении кремния в карбид кремния
Authors: Грудинкин C.А. , Кукушкин С.А. , Осипов А.В. , Феоктистов Н.А.
Published: November 2017

Методами инфракрасной спектроскопии (ИК) и спектральной эллипсометрии экспериментально подтвержден предсказанный ранее теоретически механохимический эффект нарушения стехиометрии состава, ведущий к образованию углерод-вакансионных структур в пленках карбида кремния (SiC) на подложках кремния (Si), выращенных методом замещения атомов. Обнаружено, что полоса в области 960 cm-1 в ИК-спектрах пленок SiC на Si, отвечающая "углерод-вакансионным кластерам", всегда присутствует в пленках SiC, выращенных в атмосфере чистого монооксида углерода (CO) или в смеси CO с силаном (SiH4) на подложках Si различной ориентации, уровня и типа легирования. Установлено отсутствие полосы поглощения в области 960 cm-1 в ИК-спектрах пленок SiC, синтезированных при оптимальном соотношении давлений газов CO и трихлорсилана (SiHCl3). Экспериментально подтвержден предсказанный ранее теоретически механизм протекания химической реакции замещения атомов Si на углерод (С) при взаимодействии газов CO и SiHCl3 на поверхности подложки Si, приводящий к формированию эпитаксиальных слоев монокристаллического SiC. Исследование выполнено при финансовой поддержке РФФИ (гранты N 15-0306155, 16-29-03149-офи) и в рамках проектной части гос. задания (проект: N 16.2811.2017/ПЧ). Работа выполнена при использовании оборудования Уникальной научной установки (УНУ) "Физика, химия и механика кристаллов и тонких пленок" ФГУН ИПМаш РАН (Санкт-Петербург). DOI: 10.21883/FTT.2017.12.45239.173
Высокотемпературная теплоемкость оксидов системы CdO-V-=SUB=-2-=/SUB=-O-=SUB=-5-=/SUB=-
Authors: Денисова Л.Т. , Чумилина Л.Г. , Белоусова Н.В. , Денисов В.М. , Галиахметова Н.А.
Published: November 2017

Твердофазным синтезом из CdO и V2O5 при последовательном обжиге получены Cd2V2O7 (823-1073 K) и CdV2O6 (823-853 K). Методом дифференциальной сканирующей калориметрии измерена молярная теплоемкость оксидных соединений. С использованием экспериментальных зависимостей Cp=f(T) рассчитаны изменения энтальпии, энтропии и приведенной энергии Гиббса. Показано, что между удельной теплоемкостью и составом оксидов системы CdO-V2O5 имеется корреляция. Работа выполнена при финансовой поддержке Министерства образования и науки Российской Федерации в рамках Госзадания на 2017-2019 гг. (проект 4.8083.2017/БЧ Формирование банка данных термодинамических характеристик сложнооксидных полифункциональных материалов, содержащих редкие и рассеянные элементы"). DOI: 10.21883/FTT.2017.12.45253.145
Обострение оптических импульсов в вертикально-излучающих лазерах с активной областью на основе субмонослойных квантовых точек InGaAs
Authors: Дюделев В.В. , Малеев Н.А. , Кузьменков А.Г. , Блохин С.А. , Мыльников В.Ю. , Кучинский В.И. , Устинов В.М. , Рафаилов Э.У. , Соколовский Г.С.
Published: November 2017

-1 Представлены результаты исследований вертикально-излучающих лазеров на основе субмонослойных квантовых точек InGaAs с оксидной апертурой диаметром ~ 1 mum. Продемонстрирована возможность обострения выходных оптических импульсов до 50-100 ps при накачке электрическими импульсами длительностью 10-100 ns с частотой повторения 10-100 kHz. DOI: 10.21883/PJTF.2017.24.45336.16992
Фотодетектор видимого и ближнего инфракрасного диапазона длин волн на основе осажденного из газовой фазы алмаза
Authors: Кукушкин В.А. , Радищев Д.Б. , Лобаев М.А. , Богданов С.А. , Здоровейщев А.В. , Чунин И.И.
Published: November 2017

Создан фотодетектор видимого и ближнего инфракрасного диапазона длин волн на основе осажденного из газовой фазы модулированно-легированного бором алмаза. Поглощение электромагнитного излучения происходит в тонком биметаллическом слое Cr (толщина 7 nm) и Au (толщина 5.5 nm), находящемся на поверхности осажденной алмазной пленки, состоящей из высоколегированного (до концентрации 5· 1019 cm-3) дельта-слоя с толщиной 3 nm, низколегированного (~ 1017 cm-3) слоя с толщиной 800 nm и высоколегированного (1020 cm-3) слоя с толщиной ~ 10 mum, на котором сформирован омический контакт Ti(50 nm)/Pt(15 nm)/ Au(30 nm). Рождающиеся в биметаллическом слое дырки диффундируют в алмаз, ускоряются электрическим полем, создаваемым пространственным зарядом в низколегированном слое, и создают фототок. Измеренная ампер-ваттная чувствительность достигает 1 muA/W при длине волны излучения 445 nm и 0.18 muA/W при 1.06 mum. DOI: 10.21883/PJTF.2017.24.45343.16860