Strong Convergence of A Hybrid Method for Infinite Family of Nonexpansive Mapping and Variational Inequality

The motivation behind this paper is to use hybrid method for searching a typical component of the set of fixed point of an infinite family of non expansive mapping and the set of monotone, Lipschtiz continuous variational inequality problem. The contemplated method is combination of two method one is extragradient method and the other one is DQ method. Also, we demonstrate the strong convergence of the designed iterative technique, under some warm conditions.

Conditions for the physical realizability of a typical component z(y)-matrix of a matching quadrupole of a general form in a concentrated elemental basis

When solving problems of broadband matching, very often there is a need for a certain form of the amplitude-frequency characteristic. In connection with this, the problem comes up of synthesizing broadband matching devices that simultaneously have correcting properties, i.e. having a given frequency dependence of the power conversion coefficient in the operating frequency band. The use of broadband reactive matching - correcting circuits in most practical cases is difficult because of the reflected power. This leads to the problem of the synthesis of broadband matching-correcting circuits with arbitrary immittances of the signal source and load in an elemental basis of a general form, containing along with reactive and active elements, which has not been adequately solved. Therefore, it becomes necessary to find the conditions for the physical realizability of a typical component of the immitance matrix of a two-port network of general form containing poles in the left half-plane of complex frequencies. In this paper the necessary and sufficient conditions are defined for the physical realizability of the immitance matrix of a typical component of a subclass of two-terminal networks of general form in a lumped elemental electric basis, when the poles of the Eigen functions in the Foster representation can be in the left half-plane of complex frequencies, excluding the imaginary and real axes. This allows to synthesis of broadband dissipative matching, matching-correcting circuits and matched attenuators in an elemental basis of a general form with arbitrary immitances of the signal source and load from a single point of view.

Enhanced Infrared Sparse Pattern Extraction and Usage for Impact Evaluation of Basalt-Carbon Hybrid Composites by Pulsed Thermography

Nowadays, infrared thermography, as a widely used non-destructive testing method, is increasingly studied for impact evaluation of composite structures. Sparse pattern extraction is attracting increasing attention as an advanced post-processing method. In this paper, an enhanced sparse pattern extraction framework is presented for thermographic sequence processing and defect detection. This framework adapts cropping operator and typical component extraction as a preprocessing step to reduce the dimensions of raw data and applies sparse pattern extraction algorithms to enhance the contrast on the defect area. Different cases are studied involving several defects in four basalt-carbon hybrid fiber-reinforced polymer composite laminates. Finally, comparative analysis with intensity distribution is carried out to verify the effectiveness of contrast enhancement using this framework.

An experiment on biological objects: composite facial graft cross-transplantation

Facial graft transplantation remains the operation of choice for patients with extensive tissue defects in the maxillofacial region. This study aimed to set up an experiment on biological objects, develop and test a combined facial graft cross-transplantation technique, select the anesthetic aid allowing to reduce the risks of perioperative complications, improve survivability of the subjects by reducing the duration of surgical intervention, develop a postoperative therapy and rehabilitation protocol, assess detection of an acute rejection reaction and develop the immunosuppressive therapy protocol. We conducted three series of facial graft transplantation surgeries on 26 minipigs and tested the typical component combinations and flap designs. At all stages of the experiment, we managed to have the subjects surviving for over 30 days without disrupting their vital functions. The immunosuppression procedure was developed and tested. The chosen technique allows transplanting two grafts within a single surgery on one pair.

Peculiarities of the molecular composition of heterochromatin associated with pronucleoli in mouse embryos

The nucleus of pre-implantation mammalian embryos is characterized by peculiar structural organization. At the initial stages of cleavage, the nucleus of the embryo contains the so-called nucleolus precursor bodies (NPBs) or pronucleoli rather than functionally active nucleoli. The NPBs are fibrillar electron-dense structures inactive in RNA synthesis. The vast majority of NPBs are surrounded by a ring-shaped zone of transcriptionally inactive heterochromatin. Intriguingly, these zones contain not only tri-methylated histone Н3K9me3 as an epigenetic mark of repressed chromatin but also acetylated histone H4K5ac, a well-known marker of active chromatin. Immunocytochemical data suggest that the molecular composition of this ‘ring heterochromatin’ in mouse embryos changes during the realization of embryonic genome activation events, as well as during artificial suppression of transcription. In zygotes, some factors of mRNA biogenesis including splicing factor SC35 (SRSF2) and basal transcription factor TFIID are detectable in the ring chromatin. At later stages of development, other nuclear proteins such as Y14, a core component of the exon-exon junction complex (EJC), as well as the proteins involved in chromatin remodeling (ATRX, Daxx) are also detectable in this area. A typical component of the ‘ring heterochromatin’ is actin. Anti-actin immunocytochemical labeling is most expressed at the two-cell cleavage stage after activation of the embryonic genome. Indicatively, the molecular composition of the ‘ring heterochromatin’ associated with different NPBs may differ significantly even in the same nucleus. This seems to reflect the functional heterogeneity of morphologically similar NPBs according to their competence to the process of nucleologenesis. Here, we discuss briefly some peculiarities of the molecular composition and possible functions of the NPB-associated heterochromatin in mouse early embryos.

From Intention to Action: Nurses as Policy Advocates for Asthma Care in Schools

Nurses are familiar with policy at the federal, state, local, and institutional levels, but drafting a policy memo might be new to some. School nurses may have an interest in writing a health policy memo on their own, with colleagues, as part of a nursing organization, or with students who are interested in learning about policy development, school health, and safety. The intention of writing a policy memo is to offer a concisely written analysis of an issue, including background, landscape, and available options, along with recommendations for action to persons in authority, such as congressmen, senators, local officials, or school boards. The first section of this article serves as an exemplar of a policy memo, using the public health topic of asthma. Next, the article focuses on barriers to policy development for this condition in schools and offers selected strategies to address those barriers. While a discourse concerning barriers is not a typical component of a policy memo, this section shows how school nurses can draw on evidence to consider the best way to make positive change. To construct a sturdy argument for change, school nurses need to appreciate potential counterarguments, which is why this exemplar is included.

Consolidation-Driven Defect Generation in Thick Composite Parts

Fiber waviness is one of the most significant defects that occurs in composites due to the severe knockdown in mechanical properties that it causes. This paper investigates the mechanisms for the generation of fiber path defects during processing of composites prepreg materials and proposes new predictive numerical models. A key focus of the work was on thick sections, where consolidation of the ply stack leads to out of plane ply movement. This deformation can either directly lead to fiber waviness or can cause excess fiber length in a ply that in turn leads to the formation of wrinkles. The novel predictive model, built on extensive characterization of prepregs in small-scale compaction tests, was implemented in the finite element software abaqus as a bespoke user-defined material. A number of industrially relevant case studies were investigated to demonstrate the formation of defects in typical component features. The validated numerical model was used to extend the understanding gained from manufacturing trials to isolate the influence of various material, geometric, and process parameters on defect formation.

Permafrost-affected former agricultural soils of the Salekhard city (Central part of Yamal region)

Soil cover transformation in Russian Arctic is considered as underinvestigated. In 1920s it was started systematical studying and exploitation of natural resources of Far North of Russia. Due to development of industry and growth in area population necessity in agricultural products was growing intensively and arable soils became typical component of the soil cover in polar cities surroundings. Nowadays, however, almost all the former cultivation fields are abandoned or in poor use. Abandoned agricultural soil in sub urban territories of the Salekhard city were studied with aim to evaluate alteration of soil morphology and chemistry under agricultural impact and clarify the specificity of this process in case of permafrost-affected soils. The predominance of sandy textured parent materials within Salekhard city area was one of the main reason of favorable agricultural using of land in the north of Western Siberia in previous years. Data obtained revealed that studied soils are characterized by properties caused both by former (or existing) anthropogenic influence and natural processes (e.g. cryogenic mass transfer). Soil organic carbon content depends mainly on the character of current land use and varies significantly in studied soils. Most of the soil samples showed the highest levels of soil nutrients in the topsoil. Former arable horizon is stable in time in terms of morphological features and agrochemical state. In spite of high level of soil acidity, content of nutrients in antropogenically affected topsoils is still high after 20 years of abandoned state of soils. This indicates that agrosoils with relatively high fertility of arable topsoils could exist during long time in case of sandy-textured parent materials.