bluuebunny/crossref_metadata_2025 huggingface dataset:
PROBLEMS OF APPLICATION AND DESIGN OF SHELL FOUNDATIONS/KEVALINIŲ PAMATŲ NAUDOJIMO IR PROJEKTAVIMO KLAUSIMAI
Authors: Amšiejus Jonas , Gruodis R. , Janulevičius Pavelas
Published: March 2019

Iš žinomų pamatų tipų pamato konstrukcijos stiprumas efektyviausiai naudojamas parenkant tuščiavidurius, vadinamuosius kevalinius pamatus, dažniausiai žiedinio skerspjūvio, cilindro arba kūgio formos. Tačiau šį privalumą, kaip taisyklė, menkina neracionali tokių pamatų gamybos bei įrengimo technologija.

Darbe apsistota ties melioracijoje plačiai naudotais gelžbetoniniais beslėgiais vamzdžiais, kurių poreikis pastaruoju metu gerokai sumažėjęs. Jų cilindro forma leidžia šiai vamzdinei konstrukcijai taikyti pagrindinį gręžininių pamatų technologijos pranašumą, kurio dėka pamato pado projektinė altitudė pasiekiama ne tradiciniu kasimu, bet gręžimu. Šiuo atveju gelžbetoniniai vamzdžiai būtų įstatomi į šiek tiek didesnio skersmens gręžinius. Susidariusį tarpą, tarp pamato ir gręžinio sienučių būtina užpildyti tuo pačiu, tačiau sutankintu gruntu. Autorių įsitikinimu, viršutinėje pamato dalyje įrengus gelžbetoninę pagalvę, visą kitą vidinę pamato dalį pakanka užpildyti paprasčiausiu gerai sutankintu smęliu, vietoj seniau naudoto prekinio betono. Patentinė paieška parodė, kad toks būdas statybos praktikoje dar netaikytas. Lyginant su gręžininiais pamatais, šiuo metodu betono sutaupoma 3 ir daugiau kartų, o gamybos bei įrengimo išlaidų—iki 2 kartų. Tokio tipo kevaliniai pamatai, galbūt net vadintini vamzdiniais, taptų dar efektyvesniais, jeigu iki projektinės padėties būtų gramzdinami kalamuoju arba vibraciniu būdu.

Straipsnyje paliesti naujos pamatų konstrukcijos taikymo, projektavimo bei tyrimo klausimai. Parodoma, kad pamato apkrovimo momento reikšmė labai priklauso nuo pasirinktos skaičiuojamosios schemos, pagal kurią pamato sujungimas su antžeminėmis konstrukcijomis gali būti laisvasis arba standusis. Kaip rodo skaičiavimo rezultatai, standžiojo sujungimo atveju pamato viršutinės dalies poslinkis bei posūkis sumažėja iki 2, o maksimalus lenkimo momentas—net iki 4 kartų. Aptariami ir kiti šių pamatų projektavimo ypatumai bei tolesnių tyrimų kryptys.
THE INTERACTION OF SOUND FIELDS SEPARATED BY THE RESONANT SUSPENDED CEILING/GARSO LAUKŲ, ATSKIRTŲ REZONANSINĖMIS KABAMOSIOMIS LUBOMIS, SĄVEIKA
Authors: Stauskis Vytautas
Published: March 2019

Eksperimentais ir teoriškai nagrinėjama dviejų tūrių, atskirtų rezonansinėmis kabamosiomis lubomis su stačiakampės formos plyšiais tarp plokštumų garso laukų, sąveika. Eksperimentas atliktas su salės modeliu masteliu 1:25. Nustatyta, kad dviejų tūrių, kurie skiriasi net 11 kartų, reverberaeijos laikai yra vienodi visame dažnių diapazone. To neturėtų būti, nes smarkiai skiriantis tūriams turi smarkiai skirtis ir reverberaeijos laikai, nes jų reikšmėms tūris turi lemiamos įtakos. Tai rodo, kad tarp abiejų tūrių yra garso laukų sąveika. Nefiltruoto signalo energijos iki 1500 ms slopsta vienodai, o vėliau viršutinio mažo tūrio enrgijos slopimas yra lėtesnis, negu didelio apatinio tūrio. Kada virš lubų yra garsą absorbuojanti medžiaga, tai slopimo pobūdis stipriai keičiasi. Abiejų tūrių energijos vienodai slopsta tik iki 500 ms, o paskui ilgėjant laikui viršutinio tūrio energija slopsta kur kas lėčiau, negu apatinio tūrio energija. Energijų slopimas nėra eksponentinis.

Apatinis ir viršutinis garso laukai buvo aprašyti formulėmis, pagal kurias apskaičiuotos abiejų tūrių absorbuotosios, išėjimo ir įėjimo energijos. Skaičiavimais rasta, kad energijos, išeinančios iš abiejų tūrių, nepriklauso nuo dažnio, o į abu tūrius grįž tančios energijos mažai priklauso nuo dažnio.

Skaičiavimais nustatyta, kad garso laukų sąveika priklauso nuo plyšio ploto. Skaičiavimams plyšio plotas parinktas lygus visų plyšių tarp plokštumų suminiam plotui. Nenusistovėjus procesui energijos slopimas esant vienam dažniui yra daug staigesnis esant mažesniam plyšio plotui apatiniame dideliame tūryje, ir jis slopsta pagal dvi skirtingas eksponentes. Šiame laiko intervale apatinis tūris atiduoda daug energijos viršutiniam tūriui. Nusistovėjus procesui abu tūriai pasikeičia energijomis, bet slopimas vyksta su skirtingomis reverberaeijomis. Didėjant plyšio plotui mažėja laiko tarpas, iki kurio apatinis tūris stipriai veikia viršutinį tūrį, o eksponentinis garso lauko slopimas prasideda anksčiau.

Didėjant didelio apatinio tūrio absorbeijai jo garso lauko slopimas darosi staigesnis, ir jis labiau veikia viršutinį garso lauką. Viršutinio tūrio energijos slopimas yra gerokai lėtesnis, negu apatinio tūrio, ir apatinio tūrio absorbeijos kitimas jau turi nedidelę įtaką. Kuo didesnė pirmo tūrio absorbeija, tuo vėliau prasideda eksponentinis garso lauko slopimas.

Mažėjant apatiniam tūriui ir didėjant viršutiniam tūriui eksponentinis garso lauko slopimas prasideda vėlesniu laiko momentu, o nenusistovėjus procesui energijų sąveika tarp abiejų tūrių užima platesnį laiko intervalą.
ON THE ANALYSIS OF GEOMETRICALLY NONLINEAR STRUCTURES/APIE GEOMETRIŠKAI NETIESINIŲ STRYPINIŲ SISTEMŲ SKAIČIAVIMĄ
Authors: Karkauskas Romanas
Published: March 2019

Nagrinėjame įtempčių ir deformacijų būsenos (ĮDB) nustatymą plokščiose strypinėse sistemose, kai poslinkiai dideli, o deformacijos mažos. Šiuo atveju pusiausvyros lygtys sudaromos nepaisant strypų deformacijų.

Geometriškai netiesinių tamprių sistemų ĮDB galima skaičiuoti pagal sudarytą (5) matematinį modelį, jungiantį į netiesinių lygčių sistemą visus ieškomuosius dydžius (įrąžas, poslinkius ir deformacijas). Jos supaprastintas variantas yra kubinių lygčių (6) sistema, kurioje pagrindiniai nežinomieji yra vien poslinkiai u. Tačiau ir šios sistemos sprendimas komplikuotas.

Siūlomi du ĮDB nustatymo keliai. Pirmasis—papildomos apkrovos metodas. Taikant šį metodą skaičiuojama etapais. Pasirenkamas apkrovos žingsnis ΔF. Nuosekliai didinant apkrovą. šiuo žingsniu randami poslinkių ir įrąžų prieaugiai Δu ν ir ΔS ν. Čia kiekviename apkrovimo etape pusiausvyros lygčių matrica [A(uΣ)] sudaroma atsižvelgiant į ankstesnių apkrovimo etapų konstrukcijos deformavimo istoriją, o geometrinių lygčių matrica yra transponuota [A(uΣ)]T. Dėl to kubinių lygčių sistema (6) tampa tiesinių lygčių sistema, kurios sprendinys yra poslinkių prieaugių vektorius Δu ν, randamas pagal (8) išraišką. Po to pagal (9) išraišką randamas ΔSν.

Antrasis būdas ĮDB skaičiuoti yra pagrįstas Niutono-Rafsono metodu. Čia naudojant rekurenčiąją. formulą (13), kurioje poslinkių prieaugiai skaičiuojami pagal (18) formulę, randamos kubinės lygties (6) šaknys. Niutono- Rafsono metodas pradinei iteracijai poslinkių vektorių u ν siūlo imti iš geometriškai tiesinio skaičavimo.

Abiejų metodų taikymas iliustruojamas pavyzdžiais. Atlikti skaitiniai eksperimentai atskleidė siūlomų metodų efektyvumą ir jų galimybę taikyti geometriškai netiesinių tamprių-plastinių sistemų analizės ir optimizavimo uždaviniams.
STRAINS AND STRESSES OF THREE—LAYER COMPOSITE BARS AND BEAMS/TRISLUOKSNIŲ KOMPOZITINIŲ STRYPŲ IR SIJŲ DEFORMACIJOS BEI ĮTEMPIMAI
Authors: Bareišis Jonas , Garuckas Danas , Mikulskas Alvydas A. , Striukienė Danguolė
Published: March 2019

New composite anisotropic materials (CM) glass, carbon and boric plastics are more and more frequently used in engineering construction. By tuning strength and stiffness characteristics of CM under tension or bending with their density or price it is possible to get laminated construction of maximum strength and stiffness and minimum mass or price.

The purpose of this work is to analyse regularity of distribution of stiffness or strains and stresses in three-layer bars, subjected to tension or bending by changing geometric characteristics of layer, materials and their position in cross-section of bars. The bar layers were formed of carbon plastic (A), hot (Sk) and cold hardening (Sc) glass plastics and epoxy resin (D).

Equations were obtained describing the alteration of bar and beam stiffness and the alteration of normal stresses, all depending on relative thichness Ψ of bar or beam. The relative thickness Ψ is the ratio of middle layer height to the whole height.

It has been shown that maximum stresses in exterior and middle layers (with elasticity modules E1 and E2accordingly) become equal when Ψ = E1 /E2 . The intensity of stiffness alteration depends on the magnitude of | E2 —E1 |. In the case of positive magnitude, the bar or beam stiffness increases while increasing Ψ. In the opposite case the stiffness decreases with decrease of Ψ.

For the example of structure A-Sk—A and Ψ = 0,5, the price economy for 42% and mass reduction for 4% have been shown and compared with carbon plastic beam.
STOCHASTIC STABILITY PROBLEMS IN STRUCTURAL MECHANICS/STOCHASTINIAI KONSTRUKCIJŲ MECHANIKOS STABILUMO UŽDAVINIAI
Authors: Bucher Christian
Published: March 2019

Straipsnyje nagrinėjamas konstrukcijų su atsitiktinėmis savybėmis stabilumas. Tokios konstrukcijos yra veikiamos statinių bei atsitiktinių dinaminių apkrovų. Tiriama priklausomybė tarp konstrukcijos savybių ir parametrinės apkrovos rodiklių. Stochastinių baigtinių elementų idėja taikoma geometriškai netiesinių sistemų analizei.

Stabilumo uždavinys yra nagrinėjamas tiek statinio, tiek dinaminio stabilumo prasme. Išanalizavus apibendrintos diskrečosios sistemos judėjimo lygtis (1–9), stabilumo uždavinys formuluojamas kaip tikrinių reikšmių uždavinys (10–11) nežinomo apkrovos daugiklio atžvilgiu. Tam tikrais atvejais dinaminio stabilumo uždavinys virsta kritinės virpesių formos stabilumo uždaviniu (12–13).

Stochastinis stabilumo uždavinys yra realizuotas programų paketo pavidalu, o straipsnyje pateikiami išspręsti skaitiniai pavyzdžiai. Pirmajame pavyzdyje nagrinėjamas erdvinės strypinės sistemos statinis stabilumas. Čia strypų tamprumo modulis yra atsitiktinis dydis. Jo atsitiktinės savybės modeliuojamos Monte Karlo metodu. Išnagrinėta kritinės apkrovos rodiklio priklausomybė nuo atsitiktinių veiksnių. Skaičiavimo rezultatai iliustruojami 1–4 paveikslais. Antrame pavyzdyje nagrinėjamas tilto stabilumas veikiant dinaminėms stochastinės prigimties apkrovoms, 5 pav.
New Spectral Characterization of Dimethyl Ether Isotopologues CH3OCH3 and 13CH3OCH3 in the THz Region
Authors: Fernández J. M. , Tejeda G. , Carvajal M. , Senent M. L.
Published: March 2019

The torsional Raman spectra of two astrophysically detected isotopologues of dimethyl ether (DME, 12CH3O12CH3 and 13CH3O12CH3) have been recorded at room temperature and cooled in a supersonic jet and interpreted with the help of highly correlated ab initio calculations. DME displays excited torsional and vibrational levels at low energy that can be populated at the temperatures of the star-forming regions, obliging to extend the analysis of the rotational spectrum over the ground state. Its spectrum in the THz region is rather complex due to the coupling of the torsional overtones 2ν
11 and 2ν
15 with the COC-bending mode and the presence of many hot bands. The torsional overtones are set here at 2ν
11 = 385.2 cm−1 and 2ν
15 = 482.0 cm−1 for 12CH3O12CH3 and 2ν
11 = 385.0 cm−1 and 2ν
15 = 481.1 cm−1 for 13CH3O12CH3. The new assignment of 2ν
11 is downshifted around ∼10 cm−1 with respect to the literature. All the other (hot) bands have been reassigned consistently. In addition, the infrared-forbidden torsional fundamental band ν
11 is observed here at 197.8 cm−1. The new spectral characterization in the THz region reported here provides improved values of the Hamiltonian parameters to be used in the analysis of the rotational spectra of DME isotopologues for further astrophysical detections.
PRIVATE MILITARY COMPANIES IN COUNTERINSURGENCY: Discussion about Erik Prince´s concepts
Authors: Plávka Dominik
Published: March 2019

This text deals with the analysis of private military companies as an counterinsurgency actor in Afghanistan from the point of view of Erik Prince's proposal and application to the theory of David Kilcullen. The first part of the thesis deals with the theoretical and terminological definition of the basic concepts of this issue. A key part of the thesis is the subsequent analysis of the Prince's proposal and application to the theory of counterinsurgency. The conclusion of the work brings a general summary and recommendations based on the analysis.
The efficiency of low-dose Hepatitis B Immunoglobulin plus nucleos(t)ide analogs in preventing post-transplant HBV recurrence
Authors: VATANSEVER SEZGİN , FERECOV RASIM , YILMAZ HÜSEYİN CAHİT , ZEYTUNLU MURAT , KILIÇ MURAT
Published: March 2019

Background/aim: In this study, the efficiency of using low-dose HBIG plus antiviral treatment according to individual needs have been evaluated in post-transplant HBV patients.
Material and methods: We retrospectively evaluated 179 patients who admitted between 2009-2014. Five thousand IU IV HBIG was given in anhepatic phase, and 400 IU/day IM HBIG was given in the post-transplant period. After HBsAg seroconversion 400 IU IM HBIG every two weeks as prophylaxis was continued.
Results: Average follow-up period was 26 (2-65) months. Seventy patients had hepatocellular carcinoma (HCC). The HBV recurrence was 4.5% in the 1st year, and 5.8% in the 3rd year. The HBsAg became negative in 11 (2-63) days, and anti-HBs became positive in 9 (1-31) days. HBsAg positivity occurred in 6 patients during the follow-up period. Five of these patients were those who were transplanted due to HCC. In 5 of the HCC patients whose HBsAg became positive, tumor recurrence was observed after 0.3-9.9 months. HBsAg positivity was more frequently detected in patients with HCC (p=0.009).
Conclusion: The HBV recurrence should be evaluated as a predictor of HCC recurrence in patients who were transplanted due to HCC.
Dermoscopic aspect of verrucous epidermal nevi: New findings
Authors: ELMAS ÖMER FARUK , AKDENİZ NECMETTİN
Published: March 2019

Background and Aim: Verrucous epidermal nevi are cutaneous hamartomas having many clinical variants. Dermoscopic features of verrucous epidermal nevus have rarely been investigated. We aimed to identify dermoscopic findings of the entity which will facilitate the diagnostic process by reducing the use of invasive diagnostic methods.
Material and Methods: The study included the patients with histopathologically approved verrucous epidermal nevus. Clinical, dermoscopic and histopathological features of the patients were retrospectively reviewed and the findings identified were recorded. Dermoscopic examination was performed with a polarized-light handheld dermoscope with 10-fold magnification.
Results: The most common dermoscopic features were thick brown circles, thick brown branched lines and terminal hairs. The most common vessel pattern was dotted vessels. Branched thick brown lines, brown globules, brown dots forming lines, serpiginous brown dots, white and brown exophytic papillary structures, fine scale, thick adherent scale and cerebriform structures were the other findings.
Conclusion: We observed many vascular and non-vascular dermoscopic findings which have not been described previously for the entity. Dermoscopic examination of the verrucous epidermal nevi may lead more reliable clinical interpretation and thus it may reduce the need for histopathological investigation.
Keywords: dermoscopy, large brown circles, verrucous epidermal nevus
Validation and Reliability Study of the Turkish Version of the Neuroquality of Life (Neuro-QoL) - Stigma Scale in Neurological Disorders
Authors: KARŞIDAĞ SİBEL , ÇINAR NİLŞGÜN , ŞAHİN ŞEVKİ , KOTEVOĞLU NURDAN , FLORENTINA ATEŞ MİRUNA
Published: March 2019

Background/aim: Stigma can be defined as a negative perception of chronically ill patients by their relatives or by society, or a similar self-perception by the patients themselves. We aimed to validate the Turkish version of the Neuroquality of Life (Neuro-QoL) - Stigma Scale for neurologic diseases.
Materials and Methods: Forms were filled out total 152 randomized patients under regular follow-up in the outpatient clinic (29 polyneuropathies, 25 epilepsy, 23 strokes, 24 tension-type headache, 28 multiple sclerosis, 27 Parkinson?s disease). The forms consisted of Beck depression inventory (BDI), Beck anxiety inventory (BAI), WHOQOL-BREF quality of life scale, the multidimensional scale of perceived social support (MSPSS), the general self-efficacy (GSE) scale, and Neuro-QoL-stigma scale.
Results: The internal consistency of the Neuro-QoL-Stigma scale showed Cronbach?s ? coefficients of 0.95 for all groups. The mean scores stigma scales were 33.42 ±13.91 (min-max: 24-87). There are strong negative correlations between high stigma score and GSE-T, MSPSS-T, WHOQOL-BREF; and positive correlation with BDI and BAI.
Conclusion: The Turkish version Neuro-QoL-Stigma has satisfactory content validity and high internal consistency. The Neuro-QoL-Stigma is suitable to understand stigmatization in different neurological disorders in the Turkish population. The scale is available for use at http://www.healthmeasures.net/explore-measurement-systems/neuro-qol
Woman with bilateral painful lower limb swelling: Case report of an atypical presentation of toxoplasmosis in immunocompetent adult
Authors: Verni S. , Perera K. J. C. , Paramanantham A. , Munasinghe T. M. J.
Published: March 2019

A 43 year old previously healthy woman presented with painful bilateral lower limb swelling for 3 weeks, and fever and polyarthralgia of 3 days duration. She had a history of close contact with cats. Examination revealed moderate hepatomegaly with severe muscle tenderness. She had eosinophilia and elevated creatinine kinase and lactate dehydrogenase. Results of her toxoplasmosis serology were consistent with acute toxoplasmosis. Immunosuppressive conditions were excluded. Bone marrow biopsy revealed marked eosinophilia. According to these findings she was diagnosed as having acute toxoplasmosis complicated with myositis. This was further strengthened by her response to pyrimethamine and sulfadiazine treatment.
Continuity, positivity and simplicity of the Lyapunov exponents for quasi-periodic cocycles
Authors: Duarte Pedro , Klein Silvius
Published: March 2019

An analytic quasi-periodic cocycle is a linear cocycle over a fixed ergodic torus translation of one or several variables, where the fiber action depends analytically on the base point. Consider the space of all such cocycles of any given dimension and endow it with the uniform norm. Assume that the translation vector satisfies a generic Diophantine condition. We establish large deviation type estimates for the iterates of such cocycles, which, moreover, are stable under small perturbations of the cocycle.

As a consequence of these uniform estimates, we obtain continuity properties of the Lyapunov exponents regarded as functions on this space of cocycles. This result builds upon our previous work on this topic and its proof uses an abstract continuity theorem for the Lyapunov exponents which we derived in a recent monograph.

The new feature of this paper is extending the availability of such results to cocycles that are identically singular (i.e. non-invertible everywhere), in the several variables torus translation setting. This feature is exactly what allows us, through a simple limiting argument, to obtain criteria for the positivity and simplicity of the Lyapunov exponents of such cocycles.

Specializing to the family of cocycles corresponding to a block Jacobi operator, we derive consequences on the continuity, positivity and simplicity of its Lyapunov exponents, and on the continuity of its integrated density of states.
Barycenters of polytope skeleta and counterexamples to the Topological Tverberg Conjecture, via constraints
Authors: Blagojević Pavle V.M. , Frick Florian , Ziegler Günter M.
Published: March 2019

Using the authors’ 2014 “constraint method,” we give a short proof for a 2015 result of Dobbins on representations of a point in a polytope as the barycenter of points in a skeleton, and show that the “

r

-fold Whitney trick” of Mabillard and Wagner (2014/2015) implies that the Topological Tverberg Conjecture for

r

-fold intersections fails dramatically for all

r

that are not prime powers.
Mirai: el pasado que nos define
Authors: Montero Plata Laura
Published: March 2019

Si una cosa está clara, es que Mamoru Hosoda hace sus películas con el corazón. Lo mismo que podía decirse de Miyazaki hace menos de diez años es lo que define el impacto conmovedor que causa en los espectadores la filmografía de este personal autor, cofundador del Studio Chizu en 2011, y que en su momento declinó trabajar para el Studio Ghibli cuando se le propuso dirigir el proyecto de El castillo ambulante (Hauru no Ugoku Shiro, Hayao Miyazaki, 2004). Laura Montero Plata —autora de las monografías El mundo invisible de Hayao Miyazaki (Dolmen, 2012) y La princesa Mononoke (Héroes de Papel, 2017), de la Biblioteca Studio Ghibli— reseña para Con A de animación la más reciente película de Mamoru Hosoda: Mirai, mi hermana pequeña (Mirai no Mirai, 2018), que ha formado parte de la selección oficial de Festival de Annecy (Francia), Cannes (Quincena de los Realizadores), está actualmente nominada a dos premios Annie y ha hecho historia siendo la primera película de animación japonesa nominada a los Globos de Oro.
Sin clímax, sin inflexión, sin sentido. Introducción al Yaoi
Authors: Núñez Sánchez Lidia
Published: March 2019

El yaoi se ha quedado por el momento en Occidente como término para historias que presentan relaciones amorosas entre chicos. Creado por y para mujeres, el yaoi se presenta como una escapatoria de los roles de género que funciona no solo en su país de origen, sino a nivel global. En estas historias la lectora se identificará con uno de los hombres, o con ambos, y podrá vivir en un mundo sin géneros ni identidades, en un mundo completamente libre.
Retrieval of snow freeboard of Antarctic sea ice using waveform fitting of CryoSat-2 returns
Authors: Fons Steven W. , Kurtz Nathan T.
Published: March 2019

Abstract. In this paper we develop a CryoSat-2 algorithm to retrieve
the surface elevation of the air–snow interface over Antarctic sea ice. This algorithm
utilizes a two-layer physical model that accounts for scattering from a snow layer atop
sea ice as well as scattering from below the snow surface. The model produces waveforms
that are fit to CryoSat-2 level 1B data through a bounded trust region least-squares
fitting process. These fit waveforms are then used to track the air–snow interface and
retrieve the surface elevation at each point along the CryoSat-2 ground track, from which
the snow freeboard is computed. To validate this algorithm, we compare retrieved surface
elevation measurements and snow surface radar return power levels with those from
Operation IceBridge, which flew along a contemporaneous CryoSat-2 orbit in October 2011
and November 2012. Average elevation differences (standard deviations) along the flight
lines (IceBridge Airborne Topographic Mapper, ATM – CryoSat-2) are found to be 0.016 cm
(29.24 cm) in 2011 and 2.58 cm (26.65 cm) in 2012. The spatial distribution of monthly
average pan-Antarctic snow freeboard found using this method is similar to what was
observed from NASA's Ice, Cloud, and land Elevation Satellite (ICESat), where the
difference (standard deviation) between October 2011–2017 CryoSat-2 mean snow freeboard
and spring 2003–2007 mean freeboard from ICESat is 1.92 cm (9.23 cm). While our
results suggest that this physical model and waveform fitting method can be used to
retrieve snow freeboard from CryoSat-2, allowing for the potential to join laser and
radar altimetry data records in the Antarctic, larger (∼30 cm) regional
differences from ICESat and along-track differences from ATM do exist, suggesting the
need for future improvements to the method. Snow–ice interface elevation retrieval is
also explored as a potential to obtain snow depth measurements. However, it is found that
this retrieval method often tracks a strong scattering layer within the snow layer
instead of the actual snow–ice interface, leading to an overestimation of ice freeboard
and an underestimation of snow depth in much of the Southern Ocean but with promising
results in areas such as the East Antarctic sector.
Educadora ou tia: os reflexos da feminização do magistério na construção da identidade profissional de professores (as) da educação infantil
Authors: Rodrigues de Souza Andréa , Carlos de Melo José
Published: March 2019

O presente artigo configura-se como um recorte de uma pesquisa de pós-graduação em docência na educação infantil, tendo como objetivo principal analisar os reflexos do processo de feminização da docência na construção da identidade profissional das professoras de educação infantil em uma rede pública municipal, a partir dos conhecimentos adquiridos no curso de especialização em docência na educação infantil (CEDEI). A pesquisa se caracteriza como exploratória e possui uma abordagem qualitativa. Os instrumentos de coleta de dados utilizados foram um questionário semiestruturado e à observação não participante. Concluiu-se que na atualidade o mito da educadora nata ainda é muito presente, mas aos poucos vem sendo desconstruído, dando ênfase a profissionalização docente e a construção/fortalecimento de sua identidade.
Multiplicity results for Kirchhoff type elliptic problems with Hardy potential
Authors: Bagheri M. , Afrouzi Ghasem A.
Published: March 2019

In this paper, we are concerned with the existence of solutions for fourth-order Kirchhoff type elliptic problems with Hardy potential. In fact, employing a consequence of the local minimum theorem due to Bonanno and mountain pass theorem we look into the existence results for the problem under algebraic conditions with the classical Ambrosetti-Rabinowitz (AR) condition on the nonlinear term. Furthermore, by combining two algebraic conditions on the nonlinear term using two consequences of the local minimum theorem due to Bonanno we ensure the existence of two solutions, applying the mountain pass theorem given by Pucci and Serrin we establish the existence of third solution for our problem.
Separated and state-constrained separated linear programming problems on time scales
Authors: Al-Salih Rasheed , Bohner Martin J.
Published: March 2019

Separated linear programming problems can be used to model a wide range of real-world applications such as in communications, manufacturing, transportation, and so on. In this paper, we investigate novel formulations for two classes of these problems using the methodology of time scales. As a special case, we obtain the classical separated continuous-time model and the state-constrained separated continuous-time model. We establish some of the fundamental theorems such as the weak duality theorem and the optimality condition on arbitrary time scales, while the strong duality theorem is presented for isolated time scales. Examples are given to demonstrate our new results
Effect of a medicinal agent, possessing antioxidant and antihypoxant properties, on the state of oxygen homeostasis and lipid peroxidation under experimental pneumoconiosis in albino rats
Authors: Olyinyk A. , Ślifirczyk A , Nikoniuk M. , Celiński M. , Domańska D>
Published: March 2019

Introduction: Pneumoconioses (Pc) are interstitial pulmonary diseases of professional genesis, caused by long-term inhalation of high dust concentrations. Pcafflict 26.6-53% of the workers, exposed to dust contamination. The major feature of Pc course is irrevocability and incurability. Purpose: The research of the effect of ethylmethyl hydroxypyridine succinate, possessing antioxidant and antihypoxant characteristics, on the oxygen metabolism, acid-alkaline state, and lipid peroxidation at the background of experimental pneumoconiosis in albino rats. Material and methods: Pneumoconiosis was simulated on 72 albino rats through endotracheal injection of black coal suspension, on our own modification of O. Yu. Nykolenko methodology. Results: Manifestations of experimental pneumo-coniosis depended on the period of dust inhalation. Development of experimental pneumoconiosis was found to result in the decreased partial oxygen pressure in the arterial blood, compensated hyperventilation-induced respiratory alkalosis, and marked increase in lipid peroxidation activity that could be seen in the blood content of malon-dialdehyde, as well as of conjugated dienes and trienes. Conclusions: Application of ethylmethylhydroxy pyridine succinate in experimental pneumoconiosis has been found to improve oxygen metabolism, acid-alkaline state, and lipid peroxidation that is revealed in normalization of the partial oxygen pressure in the arterial blood, oxygen saturation of haemoglobin, index of bases’ deficiency BE (Ваse-Ехсеss), and in 1.6-2.0 decrease in the content of malondialdehyde, as well as of conjugated dienes and trienes.
Nursing care of a child with acute lymphoblastic leukemia
Authors: Ślifirczyk A , Piszcz P. , Ślifirczyk M. , Michalczuk T. , Urbańczuk M. , Celiński M. , Bytys M. , Domańska D. , Nikoniuk M.
Published: March 2019

Every year a very large number of children in the world suffer from acute lymphoblastic leukemia, and for years there has been a steady increase in the number of new cases. Acute lymphoblastic leukemia accounts for 75% of leukemia cases in the world. Lymphoblastic leukemia is a cancer disease that originates in B or T cell lymphocytes, which expansion takes place in blood and in the bone marrow.

The etiology of the disease is not fully understood because it consists of several factors conditioning its formation. The most important element is the early detection and taking actions resulting in effective disease control through treatment and care of the patient.

The nursing process should allow the patient to be involved in and accept the ongoing cancer process, and medical personnel, family and specialists in such fields as psychology and psychiatry should participate.
İnme Sonrası Erken Mobilizasyon Hakkında Profesyonel Görüşlerin İncelenmesi
Authors: SALCI Yeliz , BALKAN Ayla Fil , CEREN Ali Naim , KARANFİL Ecem , ÇETİN Barış , CENGİZ Melike Sümeyye , UCA Ali Ulvi , ARMUTLU Kadriye
Published: March 2019

Amaç: İnme hastalarında, çok erken ve yoğun fizyoterapinin
faydaları/zararları ile ilgili kanıtlar yetersizdir. Bu alanda çalışan
klinisyenlerin, pratik uygulamalarının kanıtlarla ne kadar örtüştüğü ise
belirsizdir. Amacımız 9 maddeli İnme Sonrası Erken Mobilizasyon Hakkında
Profesyonel Görüşler” isimli anketin öncelikle Türkçe versiyonunun
güvenilirliğinin araştırılması ve inme sonrası erken mobilizasyon hakkında
alanda çalışan sağlık profesyonellerinin görüşlerinin incelenmesidir.

Yöntemler: Çalışmaya inme hastalarıyla çalışan ya da daha
önce çalışmış 33 fizyoterapist, 16 hemşire ve 10 doktor dahil edilmiştir. Anket
demografik verileri, erken mobilizasyonun yararını ve zararını, zararlı olduğu
düşünülüyorsa harekete geçmek için en uygun zamanlamayı, ilk mobilizasyon için
dikkat edilmesi gereken faktörleri, pratik uygulamaların temelini oluşturan
kanıtları sorgulamaktadır. Anketin Türkçe versiyonunun güvenilirliğin bulunması
için 3-7 gün arayla aynı katılımcılara tekrar yaptırılmıştır.

Sonuçlar: 9 maddeli İnme Sonrası Erken Mobilizasyon Hakkında
Profesyonel Görüşler anketinin alt başlıklarının güvenilirliği ve toplam puanın
güvenilirlik derecesi mükemmel bulunmuştur (toplam puan için ICC: 0,994) .
Katılımcıların %72,9’ü (n=43), inme hastalarının iyileşmek için çok fazla yatak
istirahatine ihtiyaç duyduklarını düşünmemektedir. Ancak iskemik inme hastalarında,
katılımcıların %61’i ( n=36) 24 saat içinde erken ve yoğun yatak dışı
aktivitelere başlama konusunda endişeli iken hemorajik inme hastalarında,
katılımcıların %81,4 ’ü (n=48) endişelidir. Katılımcılar hemorajik inme
hastalarının erken mobilizasyonu konusunda iskemik inme hastalarına göre daha
fazla endişelidir (p=0,005). Yoğun yatak dışı aktiviteye başlamak için
kardiyovasküler stabilite en önemli faktör olarak görülmüştür (iskemik inme:
%32,2, hemorajik inme: %42,4). Ayrıca 3 meslek grubu karşılaştırıldığında
kardiyovasküler stabiliteye verilen önemin gruplar arasında farklılık
gösterdiği belirlenmiştir (iskemik inme için p= 0,048, hemorajik inme için
p=0,012). İkili karşılaştırma yapıldığında ise kardiyavasküler stabilitenin
fizyoterapistler açısından hemşirelere göre daha önemli olduğu gösterilmiştir (iskemik
için p=0,024, hemorajik için p=0,003).  

Tartışma: Çalışmamızın sonucunda alanda çalışan sağlık
profesyonellerinin ilk 24 saat içerisinde yoğun ve yatak dışı mobilizasyon
konusunda endişeli olduğu, hemorajik inme hastalarıyla ilgili olarak bu
endişenin daha fazla olduğu görülmüştür.
Modelo de análisis multicriterio en la evaluación de los diferentes cultivos para producción de biodiesel
Authors: Guardiola Juan Fernando Herrera , Lopes Rafaela Ferreira , Mello João Carlos Correa Baptista Soares de , Silva Flávio Castro da
Published: March 2019

Macbeth model is a multicriteria tool for the multicriteria decision making that has been used in different projects and studies of renewable energies. The purpose of this paper was apply the software Macbeth for the evaluation of canola, corn, palm and soy crops taking in to account technician, environmental and economic criterias and their weights. Canola crop was the best option for the biodiesel production, with a global score of 74 points because of their good score in environmental criterias, wich had a higher weight than the other criterias. Corn crop was the second positioned, presenting good results in all criterias, followed by palm crop. The final one was soy crop with 36,67 points in this analysis.
Estudio de la enseñanza de ecosistemas amazónicos a través de la metodología de aprendizaje basada en la resolución de problemas (ABRP)
Authors: Nascimento Carlos Henrique , Miranda Ires Paula de Andrade
Published: March 2019

The purpose was to analyze the Problem-based learning (PBL) as a methodological alternative for primary school that favor learning about Amazonian ecosystems. This research is descriptive with a qualitative-quantitative approach. The study was carried out with students from the 9th year of primary school. The teaching methodology based on the PBL was applied in two phases: In the first phase, a test of previous conceptions was carried out in order to know the perception of the students on topics related to some units of landscapes of the Amazonian ecosystems. The second phase consisted of the implementation of the learning methodology in the school environment. Four different phases were established in the application: i) selection of topics; ii) problem formulation; iii) problem solving; iv) synthesis and evaluation. The data collection instruments used were: preconceptions test and skills chart. The results showed that after the application of the ABRP methodology, the cognitive recognition of the Amazonian ecosystems can be perceived in the students, reaching additional goals that the PCN establish.
Exploratory study of limnological parameters during the cycle of tambaqui fingerlings
Authors: Figueiredo Fabiano Moreira , Bomfim Satia Costa , Lima Renato Abreu , Pontes Wesley Paulo , Pontuschka Rute Bianchini , Hurtado Fernanda Bay
Published: March 2019

As the world population's exponential growth in food security is put at risk, fish farming is one of the economic and effective alternatives in the production of noble and high protein food. For the success the monitoring of the quality of the water during the cycle is fundamental. The present study aimed at the characterization of the limnological parameters in tambaqui nursery (Colosoma macropomum). The study was carried out in the fish farm of Valle del Rio Machado in Presidente Médici - RO, from August/2015 through Junhe/2016, at 08 collection points: water supply and nurseries. The results showed that the parameters such as pH (6.1 to 8.8), ammonia (0.0 to 1.5 mg.L-1), nitrite (0.0 to 0.2 mg.L-1) , turbidity (4.1 to 62.0), were in accordance with what was established by Resolution CONAMA  357/2005; the temperature (28.2 to 38.2 °C), transparency (18 to 70 cm), and alkalinity (10 to 141 mg.L-1) were within the recommended range for fish farming in the specialized literature; dissolved oxygen ranged from 0.8 to 5.2 mg.L-1, but most of the sampled points were below 5 mg.L-1, the electrical conductivity ranging from 51.9 to 178.2 μS.cm-1 above that established by Resolution 357/2005/CONAMA. According to the results, the nurseries with cascade supply, receiving the same management are directly affected and there is thus the need for reformulation of the system in fish farming, so that it remains with individual supply and drainage.
La construcción del edificio de la Cámara de Comercio, Industria y Navegación de Melilla : Enrique Nieto
Authors: Gallego Aranda Salvador
Published: March 2019

-
La protección jurídica de las personas mayores: un reto para el siglo XXI
Authors: García Garnica María Del Carmen
Published: March 2019

El siglo xxi se enfrenta a un fenómeno de envejecimientode la población sin precedentes en la historia de la Humanidad.Se trata de un fenómeno en principio positivo. Sin embargo,desde diversos organismos internacionales se nos advierte de la crecientevulnerabilidad de las personas mayores, en tanto colectivoparticularmente expuesto a situaciones de discriminación, exclusiónsocial, pobreza y abusos tanto en lo personal como en lo patrimonial.Ante esta realidad, constituye un reto para los ordenamientosjurídicos dar una adecuada respuesta jurídica a las necesidades delas personas de edad, desde la óptica de la salvaguarda de su autonomía,su dignidad y sus derechos fundamentales. En atención a ello,el presente trabajo tiene por objeto reflexionar sobre esta realidad,reclamando una necesaria intervención legislativa en la materia.The 21st century is facing a phenomenon of populationaging unprecedented in the history of humanity. This is a positivephenomenon in a first approach. However, various internationalorganizations warn us of the growing vulnerability of elder people,as a collective particularly exposed to situations of discrimination,social exclusion, poverty and abuse both personally and economically.Therefore, it is a challenge for legal systems to provide an adequatelegal response to the needs of the elderly, from the perspectiveof safeguarding their autonomy, their dignity and their fundamentalrights. In view of this, the present work aims to reflect on this reality,claiming a necessary legislative intervention in the matter.
La gestión sanitaria en España: necesidad de un nuevo modelo de financiación y provisión de las prestaciones sanitarias
Authors: Jerez Iglesias José
Published: March 2019

La cuestión de la gestión sanitaria en España planteainterrogantes sobre cómo abordar las causas que inciden en sussíntomas de falta de sostenibilidad y como resolver sus ineficienciasmás significativas, es decir, cómo encontrar modelos más eficientesde gestión de las prestaciones sanitarias para hacer sostenible el derechoa la prestación sanitaria de los ciudadanos.Se propone una reforma del Sistema Nacional de Salud (SNS)con un modelo alternativo de financiación y provisión de las prestacionessanitarias, basado en los principios de competencia, eficacia,eficiencia y libre elección de los asegurados entre centros concertadospúblicos y privados.The issue of health management in Spain raises questionsabout how to address the causes that affect its symptoms oflack of sustainability and how to solve its most significant inefficiencies,that is, how to find more efficient models of health benefitsmanagement to make sustainable the right to health care for citizens.A reform of the National Health System is proposed with an alternativemodel of financing and provision of health benefits, basedon the principles of competence, effectiveness, efficiency and freechoice of insured persons between public and private contractedcenters.
The involvement of human endogenous retroviruses K (HERV-K) in aging processes via induction of inflammation
Authors: Ochirov Chingis
Published: March 2019

This detailed analysis provides an insight into aging processes in the human organism. The developmental program that controls the regulation of gene expression through epigenetic modifications leads to cellular senescence in the latter life. This epigenetic development system uses endogenous retroviruses and other retrotransposons as control elements that regulate gene expression through non-coding RNAs. Interaction with sex hormones causes activation of human endogenous retroviruses K (HERV-K) inducing a prolonged innate immune response and therefore chronic inflammation leading to complex changes in the signaling pathways inside the cell and thus contributes to age-associated phenotype in the form of tissue deterioration and may cause a spontaneous transition of tissues to cancer state.
Beberapa Regulasi yang Menguatkan Eksistensi Arsiparis
Authors: Sudiyanto Sudiyanto
Published: March 2019

Profesi Arsiparis masih sering dipandang sebagai profesi rendahan oleh berbagai kalangan karena hasil kerjanya yang dianggap masih kurang dirasakan untuk kelangsungan hidup organisasi. Pandangan tersebut membawa dampak yang tidak menguntungkan bagi Arsiparis. Arsiparis menjadi kurang percaya diri. Disisi lain sebenarnya tersedia cukup banyak tools berupa regulasi yang memberikan peluang kepada Arsiparis untuk ikut berkiprah dalam pelaksanaan penyelenggaraan negara. Kajian ini berusaha mendeskripsikan pasal-pasal regulasi dimaksud yang relevan dengan pengelolaan kearsipan. Dengan tersedianya berbagai regulasi diharapkan dapat memberikan stimulus bagi Arsiparis sehingga mereka makin percaya diri dan eksis dalam profesi yang ditekuninya
Economic Performance of Clarias gariepinus Juveniles Fed Separately with Factory and Farm-Made Diets
Authors: Ajang Raymond Odey , Ivon Ettah Akpang , Ndome Christopher Bassey , Ayim Elvis Monfung , Joseph Akaninyene Paul
Published: March 2019

Economic performance of using Coppens (commercial fish feed) and locally formulated feeds for Clarias gariepinus culture was studied. Forty juveniles averaging a total length of 9.15 ± 0.17cm and weight of 20.00 ± 2.58g were used and fed twice daily at 3% of their body weight. The weight gain (WG), growth rate (GR) and specific growth rate (SGR) varied significantly (p<0.05), while mean growth rate (MGR) varied insignificantly between treatment groups (p>0.05). Water parameters were at the required level. Cost of experimental feed per kilogram was highest in Coppens (₦733.33 ($2.156853)/kg) but lowest for chicken offal based diet (COBD) (₦267.00 ($0.785294)/kg). Feed consumption was higher for Coppens group (41650.00g ± 315.34) but lowest for COBD group (38276.00g ± 432.97). Cost of feeding (FC) was lower for COBD group (₦ 10219.69 ($30.057912) ±115.60) but higher in shrimp based diet (SBD) group (₦ 30,543.19 ($89.832912) ± 231.25). The ICA was higher in fish fed Coppens (₦ 1933.33 ($5.686265) ± 0.00) but lower for COBD group (₦1467.00 ($4.314706) ± 0.00). The NPV was higher in fish fed Coppens (₦ 440998.26 ($1297.053706) ±11636.93), but lower in COBD group (₦ 132916.16 ($390.929882) ± 3297.24). The PI was highest in Coppens group (₦14.44 ($0.042471) ± 0.35) but lowest in COBD group (₦ 13.01 ($0.038265) ± 0.43). The GP was higher in Coppens group (₦439064.93 ($1291.367441) ± 11636.93) but lower in COBD group (₦131449.16 ($386.615176) ± 3297.24). The IC was higher in Coppens group (₦228.10 ($0.670882) ± 6.02) but lower in COBD group (₦90.61 ($0.266500) ± 2.25). The BCR was higher in fish fed coppens (1.78±0.04) but lowest in COBD group (0.71±0.01). Feed consumed, FC, ICA, NPV, PI, GP and IC varied significantly (p<0.05), while BCR varied insignificantly (p>0.05) between treatment group. The SBD and COBD were as effective as Coppens in terms of growth performance and economic benefits. More researches should be carried out on the use of locally formulated feeds in aquaculture.
Effect of Flake Pigmentation on the Microwave-Assisted Alkaline Solvolysis of Postconsumer Polyethylene Terephthalate in Primary C1 – C3 Aliphatic Alcohols
Authors: Sanda O. , Ehinmitola E. O. , Kolapo A. Y. , Taiwo E. A.
Published: March 2019

This study was carried out to examine the alkaline solvolysis of pigmented postconsumer polyethylene terephthalate (PET) in solutions of C1 – C3 primary alcohols via microwave heating. The effect of various process parameters such as flake pigmentation, time and sodium hydroxide concentration on the degree of PET degradation and product yield were studied for each alcohol. Response surface methodology (RSM) was used for predicting the optimal conditions for alkaline solvolysis of PET scrap, with Central Composite Design (CCD) for the two parameters chosen as the experimental design. The data obtained from measurement of properties were fitted as second-order equations. The findings of this study showed that the yield is independent of the pigmentation and that microwave-assisted alkaline solvolysis of pigmented postconsumer PET resulted in higher conversion within a shorter processing time, compared to conventional heating methods with identical products obtained in each case.
Prevalence of Mutant Alleles Responsible for Chloroquine Resistance among Plasmodium falciparum Isolates in North Central, Nigeria
Authors: Edogun H. A. , Daramola G. O. , Ojerinde A. O. , Esan C. O. , Adegbuyi A. T. , Adewumi F. , Egbebi A. , Akerele E. F. , Oyedeji B. R.
Published: March 2019

Background: Although chloroquine (CQ) has been officially replaced with artemisinin combination therapy (ACT) as first line drug for the treatment of malaria in Nigeria since 2005, a lot of people still believe that chloroquine is more effective chiefly because of the decline in the sensitivity of Plasmodium falciparum to ACT. Thus resulting into unofficial use of CQ for self medication. This study was conducted in order to survey the current status of chloroquine resistant strains of pfcrt and pfmdr1 in view of possible re-introduction of chloroquine for malaria treatment.

Methods: DNA was extracted from one hundred (100) microscopically confirmed Plasmodium falciparum positive blood samples spotted on 3 mm Whatman filter paper. The detection of mutations in Plasmodium falciparum chloroquine resistance transporter (Pfcrt) and Plasmodium falciparum multidrug resistance (Pfmdr1) genes was performed by nested polymerase chain reaction (PCR) followed by restriction fragment length polymorphism (RFLP).

Results: Results showed the presence of mutant alleles of Pfcrt and Pfmdr1 in 60% and 41% of the samples respectively. However, there was no significant correlation in the prevalence of mutant alleles (T76/Y86) in relation to gender (p = 0.59/ 0.08) and age (p=0.59/0.93) of participants respectively.

Conclusion: The observed high prevalence of chloroquine resistance despite thirteen years of withdrawal calls for serious concern.