A Uniform Search for Nearby Planetary Companions to Hot Jupiters in TESS Data Reveals Hot Jupiters Are Still Lonely

We present the results of a uniform search for additional planets around all stars with confirmed hot Jupiters observed by the Transiting Exoplanet Survey Satellite (TESS) in its Cycle 1 survey of the southern ecliptic hemisphere. Our search comprises 184 total planetary systems with confirmed hot Jupiters with R p > 8 R ⊕ and orbital period <10 days. The Transit Least Squares algorithm was utilized to search for periodic signals that may have been missed by other planet search pipelines. While we recovered 169 of these confirmed hot Jupiters, our search yielded no new statistically validated planetary candidates in the parameter space searched (P < 14 days). A lack of planet candidates nearby hot Jupiters in the TESS data supports results from previous transit searches of each individual system, now down to the photometric precision of TESS. This is consistent with expectations from a high-eccentricity migration formation scenario, but additional formation indicators are needed for definitive confirmation. We injected transit signals into the light curves of the hot Jupiter sample to probe the pipeline’s sensitivity to the target parameter space, finding a dependence proportional to R p 2.32 P − 0.88 for planets within 0.3 ≤ R p ≤ 4 R ⊕ and 1 ≤ P ≤ 14 days. A statistical analysis accounting for this sensitivity provides a median and 90% confidence interval of 7.3 − 7.3 + 15.2 % for the rate of hot Jupiters with nearby companions in this target parameter space. This study demonstrates how TESS uniquely enables comprehensive searches for nearby planetary companions to nearly all the known hot Jupiters.

Thyroid incidentaloma: next to be neglected or investigated?

In modern clinical practice, thyroid incidentaloma is an unpalpated node in the thyroid gland, which is detected accidentally by technical means of imaging when examining a patient for other, non-thyroid diseases. Its dimensions are limited to 10 mm, the limit above which it can already be palpated by a qualified professional. In the author’s view, such a definition narrows the concept of incidentaloma, primarily from a nosological point of view. Under the definition of the node can be micro- or macrofollicular nodular goiter, tumor, benign (adenoma) or malignant (carcinoma), the focus of thyroiditis, cyst, inflammatory focus (infiltrate, abscess), calcifications. When enumerating the me­thods of detection by incidental, the palpation method is excluded and the nodes in the thyroid gland detected with its help are not only up to 10 mm in size but also larger, which should also be called incidental. The same can be said about the nodes that are accidentally found on the neck during operations for diseases of the trachea, cervical esophagus, salivary glands. Speaking of incidentalomas, which are detected at autopsy, it should be noted that some of them are larger than 10 mm. All these positions do not fit into the definition of thyroid incidentaloma only as an unpalpated node in the thyroid gland up to 10 mm, which is determined by instrumental imaging methods. Therefore, the concept of thyroid incidentaloma is broader and more capacious than formulated by its modern definition. Incidental thyroid disease should be considered any additional formation in it, regardless of its size, detected by any non-target method of research. Unpalpated and, as a rule, clinically “dumb” nodes up to 10 mm, determined by instrumental methods, can be considered as one of the subspecies of the incidentaloma. The frequency of their detection has increased sharply in recent years, some are malignant neoplasms with an unpredictable course, tactical approaches to them have not been finalized.

Morphological and structural features of the CdxPb1−xS films obtained by CBD from ethylenediamine-citrate bath

The calculating of ionic equilibria in the system «Pb(CH3COO)2 - CdCl2 - Na3C6H5O7 - ‎(NH3)2(CH2)2 - N2H4CS» allowed us to find conditions and concentration regions of PbS and CdS co-deposition. The determined conditions provided the CBD obtaining of CdxPb1−xS (0 ≤ x ≤ 0.033) substitutional solid solutions films with a cubic structure B1 (space group Fm ) with the grains preferred orientation (200). We established the evolution of the surface morphology of the synthesized films from cubic crystallites to hierarchical structure of globular aggregates by scanning electron microscopy. A quantitative analysis of diffraction patterns showed a decrease of microstrains in CdxPb1−xS films by a about factor of 3 with an increase of the cadmium chloride concentration in the reaction mixture from 0.005 to 0.14 mol/l. The excess of the cadmium content, established by EDX analysis, in the studied films as compared to its content in the solid solution is associated with the additional formation of the amorphous CdS phase up to 72 mol %.

Designing a Transparent and Fluorine Containing Hydrogel

Physical hydrogels are supramolecular materials obtained by self-assembly of small molecules called gelators. Aromatic amino acids and small peptides containing aromatic rings are good candidates as gelators due to their ability to form weak bonds as π-π interactions and hydrogen bonds between NH and CO of the peptide chain. In this paper we show our results in the preparation of a transparent hydrogel that was obtained by self-assembly of a fluorine-containing dipeptide that relies on the additional formation of halogen bonds due to the fluorine atoms contained in the dipeptide. We used Boc-D-F2Phe-L-Oxd-OH (F2Phe = 3,4-difluorophenylalainine; Oxd = 4-methyl-5-carboxy-oxazolidin-2-one) that formed a strong and transparent hydrogel in 0.5% w/w concentration at pH = 4.2. The formation of a hydrogel made of unnatural fluorinated amino acids may be of great interest in the evaluation of patients with parkinsonian syndromes and may be used for controlled release.

Biomorphic triangulations: constructing an additional formation pathway to achieve hierarchical self-evolution in biomorphs

Materials self-evolve to possess complex hierarchical micro-architectures.

Virtual reality as a main basis for forming modern educational technologies

In the work from the position of modern pedagogical science, a number of difficulties (risks) associated with the use of virtual reality for educational purposes are considered. The practical significance of the results lies in solving the problem under study, which formulates general provisions on the specifics of VR as a method and means of education, notes the growth of digital educational technologies and the wide potential for their application in the future. Virtual reality in education is used as the information space, in which the student can not only obtain the necessary information, but also enter into the contact with the fictitious objects. Sinking (immersion) into the educational medium helps students to acquire the habits of interaction with the virtual objects, to develop methods of collective collaboration and to find confidence in the course presentation of its own projects. The process of creating the resources with the elements of interactivity, and also the selection of the necessary instrument means is a technological and a systematic problem for the teachers, who are mastering new information technologies. The purpose of the article is construction and substantiation of the effectiveness of the model of the use of technologies of virtual reality in the course of the instruction of schoolchildren in the system of additional formation.

Interstitial Atom Engineering in Magnetic Materials

Interstitial light elements play an important role in magnetic materials by improving the magnetic properties through changes of the unit cell volume or through orbital hybridization between the magnetic and interstitial atoms. In this review focusing on the effects of interstitial atoms in Mn-based compounds, which are not well researched, the studies of interstitial atoms in three kinds of magnetic materials (rare-earth Fe-, Mn-, and rare-earth-based compounds) are surveyed. The prominent features of Mn-based compounds are interstitial-atom-induced changes or additional formation of magnetism—either a change from antiferromagnetism (paramagnetism) to ferromagnetism or an additional formation of ferromagnetism. It is noted that in some cases, ferromagnetic coupling can be abruptly caused by a small number of interstitial atoms, which has been overlooked in previous research on rare-earth Fe-based compounds. We also present candidates of Mn compounds, which enable changes of the magnetic state. The Mn-based compounds are particularly important for the easy fabrication of highly functional magnetic devices, as they allow on-demand control of magnetism without causing a large lattice mismatch, among other advantages.

Mechanoadaptive organization of stress fiber subtypes in epithelial cells under cyclic stretches and stretch release

Cyclic stretch applied to cells induces the reorganization of stress fibers. However, the correlation between the reorganization of stress fiber subtypes and strain-dependent responses of the cytoplasm and nucleus has remained unclear. Here, we investigated the dynamic involvement of stress fiber subtypes in the orientation and elongation of cyclically stretched epithelial cells. We applied uniaxial cyclic stretches at 5%, 10%, and 15% strains to cells followed by the release of the mechanical stretch. Dorsal, transverse arcs, and peripheral stress fibers were mainly involved in the cytoplasm responses whereas perinuclear cap fibers were associated with the reorientation and elongation of the nucleus. Dorsal stress fibers and transverse arcs rapidly responded within 15 min regardless of the strain magnitude to facilitate the subsequent changes in the orientation and elongation of the cytoplasm. The cyclic stretches induced the additional formation of perinuclear cap fibers and their increased number was almost maintained with a slight decline after 2-h-long stretch release. The slow formation and high stability of perinuclear cap fibers were linked to the slow reorientation kinetics and partial morphology recovery of nucleus in the presence or absence of cyclic stretches. The reorganization of stress fiber subtypes occurred in accordance with the reversible distribution of myosin II. These findings allowed us to propose a model for stretch-induced responses of the cytoplasm and nucleus in epithelial cells based on different mechanoadaptive properties of stress fiber subtypes.

FTIR- SPECTROSCOPIC CHARACTERISTICS OF THE DZHAKSY-KLYCH DEPOSIT SALTS

Kazakhstan is a country with an arid climate, where a number of salt lakes are located, where industrial production of edible salt is carried out. Due to the increase in the volume of salt production for export needs and the possibility of expanding the scope of its use for medical and cosmetic purposes, new layers and deposits of salt are being developed. The purpose of this study was to refine the characteristics of Dzhaksy-Klych Deposit salts using FTIR spectroscopy. The objects of the study were samples of salt-containing raw materials selected from different sites of Dzhaksy-Klych Deposit. Based on the conducted research, it can be predicted that when the Aral sea turns into a chloride salt lake, the main sediment will be sodium chloride, with additional formation of salt deposits from sodium sulfate, calcium or magnesium. The results obtained provide useful information about the mineralogical composition of the Aral sea region salts, which complements the knowledge about the composition of minerals. The results of FTIR analyses show that the samples of salts of lake Dzhaksy -Klych are represented by the following compositions: halite, astrakhanite, hexahydrate, gypsum, mirabilite, and the absence of toxic substances in the studied salt samples confirms their suitability for use in food, pharmaceutical and cosmetic purposes.

Features of the stages of training process are in long-term preparation of tennis players

Preparation of sportsman of high class begins from employments after children and teenagers at sport school during a few years. This process is difficult and needs detailed during a calendar year and on the corresponding stages of long-term preparation. Training work in child-youth schools and sport child-youth schools of Olympic reserve must be conducted on the basis of the special program, intended for trainers-teachers, teachers and leaders of establishments of additional formation of athletic-sport orientation and is a basic state document, that regulates educational-training and educator work, implementation of norms from special physical, technical and tactical preparation. An Educational-training process envisages the gradual increase of the training and contention loading, that decide the tasks, related to strengthening of health, development of the special physical qualities, mastering of difficult technical actions, inoculating of love to the sport competitions and increase interest in engaging in tennis. The stages of training process are examined in long-term preparation of players in table tennis, in particular: the sport- health stage, stage of initial preparation, educational-training stage, stage of sport perfection and higher sport mastery. The forms of educational-training process from table tennis show up in group and individual employments, theoretical preparation, medical control, educational-training collections and competitions, instructor and judge practice, medical and rehabilitation events.