bluuebunny/crossref_metadata_2025 huggingface dataset:
Biofiltro su naudotų padangų gumos granulių įkrova eksperimentiniai tyrimai šalinant acetoną iš oro
Authors: Vasiliauskas Vilius , Vaiškūnaitė Rasa
Published: July 2022

Efektyvumui nustatyti, šalinant acetoną iš oro, naudojamas biofiltras, užpildytas dirbtinės kilmės įkrova, sudaryta iš didelį paviršiaus plotą ir didelį poringumą turinčių naudotų padangų gumos granulių. Biofiltrą, kurio aukštis – 1,0 m, skersmuo – 0,14 m, sudaro penki įkrovos sluoksniai, cirkuliacinis siurblys, teršalų tiekimo kamera, mėginių ėmimo angos. Naudojant įkrovą, nustatytas biofiltro efektyvumas. Eksperimentinių tyrimų metu biofiltro efektyvumas buvo nustatomas, esant trims skirtingoms acetono koncentracijoms: 400±5 mg/m3, 250±5 mg/m3 ir 180±5 mg/m3. Didžiausias išvalomo oro efektyvumas biofiltre pasiektas esant mažiausiai – 180±5 mg/m3 – kiekvieno į biofiltrą tiekiamo teršalo koncentracijai. Valant orą, užterštą acetonu, pasiektas 87,3 % efektyvumas. Tiriant biofiltro efektyvumą, oro srauto greitis, tiekiamas į biofiltrą, buvo keičiamas nuo 0,08 m/s iki 0,04 m/s. Greičiams svyravus nuo 0,08 m/s iki 0,04 m/s, filtracijos laikas atitinkamai svyravo 13–25 s. Didžiausias biofiltro su panaudotų padangų gumos granulių įkrova efektyvumas gautas užterštą orą per įkrovą tiekiant 0,04 m/s greičiu, t. y. filtracijos laikui esant 25 s.
Chloridų kiekiai dirvožemyje prie intensyvaus eismo kelio Gražutės regioninio parko teritorijoje
Authors: Vaitavičiūtė-Maciulevičienė Vaida , Bradulienė Jolita
Published: July 2022

Remiantis įvairiose užsienio šalyse ir Lietuvoje atliktais tyrimais, kelių priežiūrai naudojamos sniego ir ledo tirpinimo medžiagos neigiamai tiesiogiai ir netiesiogiai veikia žmones, augalus, gyvūnus, vandenis ir dirvožemį. Ypač daug tyrimų atlikta, nustatant kelių priežiūros tirpinimo medžiagų poveikį paviršiniams ir požeminiams vandenims, augmenijai, tačiau dirvožemio taršos sniego ir ledo tirpinimo medžiagomis NaCl ir CaCl2 pagrindu chloridų kiekio tyrimų dirvožemyje beveik neatliekama, o saugomose teritorijose tokių tyrimų nėra atlikta. 2021 ir 2022 m. atlikti sniego ir ledo tirpinimo medžiagų NaCl bei CaCl2 pagrindu chloridų kiekio nustatymo dirvožemyje natūriniai tyrimai Gražutės regioninio parko teritorijoje, prie intensyvaus eismo kelių, esančių ekologiniu požiūriu jautriausiose vietovėse (draustiniuose), siekiant nustatyti dirvožemyje esančius chloridų kiekius. Tyrimai atlikti parko teritoriją kertančiame trečio lygio priežiūros krašto kelyje Nr. 179 (Dusetos–Degučiai–Dūkštas). Pagal tyrimų rezultatus gauta, kad kelių barstymo druska sezono metu chloridų koncentracijos prie kelio imtuose taškuose vienoje pusėje siekė 300 mg/kg, kitoje – 217 mg/kg. Po sezono pastebimas aiškus chloridų koncentracijų sumažėjimas – vienoje kelio pusėje nustatyta 21 mg/kg, kitoje – 17 mg/kg. Tolstant nuo kelio chloridų kiekis dirvožemyje mažėjo tiek sezono metu, tiek po barstymo sezono.
Dezinfekavimo medžiagų poveikis aplinkai
Authors: Andriulaitytė Ieva , Valentukevičienė Marina
Published: July 2022

Dezinfekavimo medžiagos priklauso biocidinių produktų grupei, jos naudojamos siekiant pašalinti pavojingų mikroorganizmų (pvz., virusų) kenksmingumą. Mokslinių tyrimų rezultatai rodo, kad pastaruoju metu tarša dezinfekcinėmis medžiagomis didėja. Paviršiams dezinfekuoti naudojamos trijų kategorijų medžiagos: stiprūs oksidatoriai (chloro junginiai ir kt.), ketvirtiniai amonio junginiai ir alkoholiai (izopropilo arba etilo alkoholis). Naujausi tyrimai rodo, kad dezinfekcinės medžiagos padeda apsisaugoti nuo infekcijų, tačiau pasižymi neigiamu poveikiu aplinkai. Šios medžiagos su lietaus nuotekomis patenka į paviršinius vandens telkinius ir, reaguodamos su vandenyje esančiomis organinėmis medžiagomis, sudaro kancerogeninius ir kitus aplinkai kenksmingus junginius (trichlormetanas, dibromchlormetanas, bromodichlormetanas, dichloracetonitrilas, halogeninės acto rūgštys, chloraminai ir pan.). Atsižvelgiant į tai, yra poreikis nustatyti dezinfekavimo medžiagų poveikį aplinkai ir pateikti šių cheminių medžiagų šalinimo iš paviršinių nuotekų rekomendacijas. Šiame straipsnyje apžvelgiamas dezinfekavimo medžiagų naudojimas paviršiams valyti, jų poveikis aplinkai, pateikiami šių cheminių medžiagų pašalinimo iš paviršinių nuotekų, naudojant ekologiškas medžiagas, būdai.
Evaluation of sewage sludge biochar use in wastewater treatment from phosphate
Authors: Paulionytė Judita , Vaiškūnaitė Rasa , Mažeikienė Aušra
Published: July 2022

Phosphorus is important in the environment and its recovery and recycling is necessary. Sewage wastewater is one of the substances in which a high amount of phosphorus and its compounds are found. Phosphorus in water is one of the causes of environmental problems such as eutrophication. The utilization of sewage sludge is a main prob- lem in both large and smaller towns. This research investigates how much and how to use sewage sludge biochar as an adsorbent to remove phosphorus compounds from wastewater. This article highlights the sorption capacity of the filler to absorb phosphorus compounds.
Geležies oksidų pagrindu sudaryto priedo poveikio dumblo pūdymo procesui tyrimas
Authors: Petrylaitė Brigita , Dauknys Regimantas
Published: July 2022

Plečiantis miesto nuotekų tinklams didėja valomų nuotekų kiekis, dėl šios priežasties didėja ir nuotekų valyklų apkrovos, susidaro didesni nuotekų dumblo kiekiai. Vienas iš sprendimo būdų intensyvinti dumblo pūdymo procesą gali būti reagentų taikymas, kurio metu taip pat susidaro biodujos – atsinaujinančios energetikos šaltinis. Siekiant sumažinti pūdymo metu susidarantį dumblo kiekį, padidinti susidarančių biodujų kiekį ir pagerinti jų kokybę, šiame tyrime buvo naudotas geležies oksido pagrindu sudarytas reagentas. Šio priedo naudojimas dumblui pūdyti 20 parų mezofilinėmis sąlygomis pagerino bepelenių sausųjų medžiagų suskaidymo efektyvumą 30 %, dvigubai paspartino pūdymo proceso piką, be to, buvo pastebėtas biodujų kokybės pagerėjimas – vidutinė metano koncentracija padidėjo 8 %. Iš gautų rezultatų galima teigti, kad geležies pagrindu sudarytas reagentas turi teigiamą įtaką dumblo pūdymo procesui.
Konstrukcijų iš perdirbto plastiko naudojimas garso izoliacijai ir sugerčiai gerinti
Authors: Naimušin Andrej , Januševičius Tomas
Published: July 2022

Darbe nagrinėjamos susidariusių plastiko atliekų naudojimo galimybės pastatų vidaus akustinėms savybėms gerinti. Darbo tikslas – apžvelgti esamą plastiko atliekų susidarymo ir perdirbimo problematiką, išanalizuoti kitų mokslininkų tyrimus žiedinės ekonomikos ir antrinių žaliavų naudojimo akustikoje tematika. Atliekant literatūros analizę buvo išnagrinėtos mokslininkų pastebėtos antrinių žaliavų naudojimo akustikoje bendros tendencijos. Išnagrinėtos pagrindinės garso izoliacijos ir medžiagų garso sugerties savybės, jų parametrai ir įtaka pastatų akustikai. Pateiktas garso izoliacijos ir sugerties savybių pritaikomumas konstrukcijoms iš perdirbto plastiko.
Lietuvos upių potvynių kaitos tyrimai ir prognozės
Authors: Šlepikaitė Lina , Bagdžiūnaitė-Litvinaitienė Lina
Published: July 2022

Darbe nagrinėjama potvynių kaita ir jų prognozės. Darbo tikslas – įvertinti skirtingų Lietuvos hidrologinių rajonų upių potvynių kaitą ir ateities prognozes. Atliekant tyrimą buvo vertinti 1988–2018 metų vidutiniai metiniai ir vasario–gegužės hidromoduliai bei didžiausi potvynio piko debitai hidrologinėse stotyse (Minija–Kartena, Merkys–Puvočiai, Lėvuo–Kupiškis). Taip pat pagal analizuojamas upes pasirinktos joms artimiausios meteorologijos stotys Mini- ja–Laukuva, Lėvuo–Utena, Merkys–Varėna. Pagal meteorologines stotis vertinama kritulių metiniai ir vasario–gegužės kiekiai. Išanalizavus hidromodulius skirtingose hidrologinėse stotyse gaunama, kad vakarų ir vidurio hidrologinio ra- jonų upėse nuotėkis tendencingai mažėja, o pietryčių Lietuvos upėje nuotėkis didėja. Kritulių 1988–2018 metų analizė parodė, kad Laukuvos ir Utenos stotyse tendencingai mažėja, o Varėnos meteorologinėje stotyje tendencingai iškrinta vis daugiau kritulių. Pagal Manno ir Kendallio ir Spearmano Rho testų rezultatus Merkio upė neparodė jokių reikšmingų tendencijų, nes duomenys yra labai skirtingi ir labai varijuoja. Minijos upėje iš trijų analizuojamų dešimtmečių nustatytos dvi reikšmingos tendencijos. Pirmame dešimtmetyje 1988–1997 m. gauta neigiama tendencija, pagal kurią potvynių debitai ateityje mažės, o antrame dešimtmetyje 1998–2007 m. maksimalus nuotėkio pikas augs. Lėvens upėje 2008–2018 m. gauta reikšminga teigiama nuotėkio tendencija. Pasaulinė klimato modelių prognozė parodė, kad pagal skirtingus modelius gaunami skirtingi rezultatai. HadGEM2-ES klimato modelis beveik visada prognozuoja neigiamus metinius nuotėkio pokyčius pagal skirtingus šiltnamio dujų emisijų RCP scenarijus. Rezultatai rodo, kad klimato kaita daro neigiamą poveikį upių hidrologiniams režimams, upių nuotėkis tampa sunkiai prognozuojamas.
Poplūdžių įtakos upių hidrologiniam režimui ištyrimas
Authors: Kucevičius Lukas , Bagdžiūnaitė-Litvinaitienė Lina
Published: July 2022

Poplūdžiai daro įtaką ekosistemų procesams, veikia upės vagoje vykstančius skendinčių, organinių medžiagų sulaikymo, irimo, maistinių medžiagų transformacijos ir mikrobiologinius procesus. Klimato kaita turi įtakos hidrologinio režimo bei vandens išteklių svyravimams, tai gali paveikti metinį nuotėkio pasiskirstymą upėse ir sukelti vis daugiau poplūdžių. Pastaruoju metu dėl klimato kaitos pasaulyje poplūdžiai tampa vis dažnesni. Skirtinguose Lietuvos regionuose vandens lygiai kinta bei poplūdžiai formuojasi skirtingai, dėl to, remiantis geomorfologiniais duomenimis, svarbu nustatyti kritulių poveikį upių nuotėkiui. Darbo tikslas – nustatyti, kokią įtaką meteorologinės bei geomorfologinės sąlygos turi Šešuvio ir Ūlos upių baseinų poplūdžio formavimuisi. Atliekama tiriamųjų Šešuvio ir Ūlos hidrologinių ir Laukuvos bei Varėnos meteorologinių stočių meteorologinių duomenų statistinė analizė. Nustatoma meteoro- loginių ir geomorfologinų sąlygų įtaka upių nuotėkio režimui. Norint įvertinti klimato sąlygų ir upių nuotėkio rodiklių ryšį, apskaičiuoti koreliacijos koeficientai. Naudojant GFDL-CM3 klimato kaitos modelį ir kompiuterines programas atliekama Šešuvio ir Ūlos upių nuotėkių ir poplūdžių 2081–2100 metų prognozė.
Sausrų išplitimo ir intensyvumo vertinimas naudojant palydovinius duomenis
Authors: Klimavičius Laurynas
Published: July 2022

Sausra – vienas iš daugiausiai nuostolių sukeliančių gamtinių reiškinių tiek Europoje, tiek visame pasaulyje. Dėl besikeičiančio klimato tikslesnis sausrų identifikavimas, jų išplitimo vertinimas pastaruoju metu tampa vis aktualesne tema ir Lietuvoje. Pastaraisiais dešimtmečiais sausroms stebėti ir identifikuoti sukurta daugybė indeksų. Vienas iš jų – temperatūros ir augmenijos sausumo indeksas TVDI (angl. Temperature Vegetation Dryness Index), apskaičiuojamas naudojant palydovinius duomenis. Pagrindinis šio darbo tikslas – įvertinti TVDI pritaikomumą stichinių sausrų išplitimo ir intensyvumo vertinimui skirtinguose žemėnaudos tipuose Lietuvoje 2002–2019 metais. Siekiant išskirti sausras, apskaičiuotas TPI rodiklis (angl. Temperature–Precipitation Index) – oficialus sausrų identi- fikavimo kriterijus Lietuvoje. Nustatytų sausrų metu visai Lietuvos teritorijai buvo apskaičiuotos TVDI vertės. Šiam tikslui pasiekti panaudoti NASA Aqua palydove įmontuoto MODIS jutiklio teikiami 8 dienų kompozicijos duomenys apie paviršiaus temperatūrą (LST) bei 16 dienų kompozicijos duomenys apie augmenijos žalumą (NDVI). Sausros at- skirai vertintos šešiuose skirtinguose žemėnaudos tipuose, išskirtuose naudojant CORINE Land Cover (CLC) 2018 metų duomenis apie Žemės paviršiaus biofizines charakteristikas. Remiantis TPI vertėmis 2002–2019 metais Lietuvoje išskirtos keturios sausros: 2002 metų liepos–rugsėjo mėnesiais, 2006 metų birželio–liepos mėnesiais, 2008 metų gegužę ir 2019 metų balandžio–gegužės mėnesiais. Nustatyta, kad didžiausią teritorijos dalį apėmė 2002 metų sausra. Ji labiausiai išplito derlingose centrinėje ir pietvakarinėje Lietuvos dalyse bei Pajūrio regione. Vertinant sausrų išplitimą skirtinguose žemėnaudos tipuose nustatyta, kad visais keturiais atvejais sausra labiausiai išplito dirbamoje žemėje arba ganyklose, o mažiausiai – spygliuočių miškuose.
Susidarančių teršalų emisijų tyrimai, panaudojant biokuro ir medienos atliekų mišinius
Authors: Chlebnikovas Aleksandras
Published: July 2022

Energijos (taip pat ir šiluminės energijos) poreikiai sparčiai auga visame pasaulyje, o tai skatina didinti energijos gavybą. Atsižvelgiant į griežtėjančius reikalavimus neatsinaujinančių energijos šaltinių naudojimui biokuro panaudojimas energetikos objektuose yra vienas iš geriausių pasirinkimų, turintis didelį augimo potencialą ir Baltijos šalių regione, ir visoje Europos Sąjungoje, jis ilgainiui tik didės. Publikacijoje ištirtos įvairių biokuro mišinių su ligninu panaudojimo šilumos gamybai galimybės ir jų degimo procesų metu susidarančios emisijos į orą. Įvertinta skirtingo lignino santykio kuro mišinyje, kietą biokurą deginančių įrenginių (katilų) galios bei kuro padavimo į degimo kamerą įtaka dujinių teršalų (CO, NOx, SO2) ir kietųjų dalelių emisijoms. Lignino panaudojimas gali efektyviai sumažinti įprasto biokuro poreikį – nuo 30 % iki 100 %, pavyzdžiui, medienos skiedrų panaudojimą degimui, taip pat padidinti išmetamųjų dujų degimo temperatūrą. Nustatyta, kad mažiausios emisijos gali būti pasiektos panaudojant 30 % lignino ir biokuro SM3 mišinį katiluose, kurių galia yra žemiausiame diapazone (2,5–4 MW). Esant optimaliam deguonies/ temperatūriniam režimui anglies monoksido koncentracijos siekia apie 20 mg/Nm3, azoto oksidų – apie 500 mg/Nm3. Kietųjų dalelių koncentracija emisijose siekia apie 150 mg/Nm3, todėl būtina taikyti oro valymo įrenginius.
Tretinio nuotekų valymo filtruojant per sluoksniuotą užpildą tyrimas
Authors: Šarko Julita , Mažeikienė Aušra
Published: July 2022

Nuotekų valyklos dažnai nepasiekia aukšto azoto ir fosforo šalinimo iš nuotekų lygio. Išvalytose nuotekose esantys azoto ir fosforo junginiai patenka į paviršinio vandens telkinius ir sukelia jų eutrofikaciją. Siekiant aukštesnio azoto ir fosforo junginių išvalymo lygio, rekomenduojamas papildomas – tretinis valymas. Eksperimentiniai tyrimai atlikti su nuotekomis iš nuotekų valyklos po biologinio nuotekų valymo. Nuotekų valyklos patalpoje buvo įrengtas filtravimo kolonų stendas. Filtravimo kolonos buvo užpildytos skirtingų filtrų užpildų (kvarcinio smėlio su geležies bei mangano oksidų plėvele, natūralaus ceolito ir Purolite (jonų mainų derva)) sluoksniais. Nustatytos nuotekų teršalų (BDS7, ChDS, NO3–N, NH4–N, PO4–P) koncentracijos į filtravimo kolonas tiekiamose nuotekose ir po jų išleidžiamose nuotekose. Taip pat nustatyti nuotekų pH, filtravimo greitis, slėgio nuostoliai. Tyrimo rezultatai yra naudingi kuriant ir tobulinant tretinio nuotekų valymo įrenginius.
New Photometric Calibration of the Wide Field Camera 3 Detectors
Authors: Calamida Annalisa , Bajaj Varun , Mack Jennifer , Marinelli Mariarosa , Medina Jennifer , Pidgeon Aidan , Kozhurina-Platais Vera , Shanahan Clare , Som Debopam
Published: July 2022

We present a new photometric calibration of the WFC3-UVIS and WFC3-IR detectors based on observations collected from 2009 to 2020 for four white dwarfs—namely, GRW +70 5824, GD 153 , GD 71 , G191B2B—and a G-type star, P330E. These calibrations include recent updates to the Hubble Space Telescope primary standard white dwarf models and a new reference flux for Vega. Time-dependent inverse sensitivities for the two WFC3-UVIS chips, UVIS1 and UVIS2, were calculated for all 42 full-frame filters after accounting for temporal changes in the observed count rates with respect to a reference epoch in 2009. We also derived new encircled energy values for a few filters and improved sensitivity ratios for the two WFC3-UVIS chips by correcting for sensitivity changes with time. Updated inverse sensitivity values for the 20 WFC3-UVIS quad filters and 15 WFC3-IR filters were derived by using the new models for the primary standards, the new Vega reference flux, and, in the case of the IR detector, new flat fields. However, these values do not account for any sensitivity changes with time. The new calibration provides a photometric internal precision better than 0.5% for the wide-, medium-, and narrowband WFC3-UVIS filters; 5% for the quad filters; and 1% for the WFC3-IR filters. As of 2020 October 15, an updated set of photometric keywords were populated in the WFC3 image headers.
Evaluating the Evidence for Water World Populations Using Mixture Models
Authors: Neil Andrew R. , Liston Jessica , Rogers Leslie A.
Published: July 2022

Water worlds have been hypothesized as an alternative to photoevaporation in order to explain the gap in the radius distribution of Kepler exoplanets. We explore water worlds within the framework of a joint mass–radius–period distribution of planets fit to a sample of transiting Kepler exoplanets, a subset of which have radial velocity mass measurements. We employ hierarchical Bayesian modeling to create a range of ten mixture models that include multiple compositional subpopulations of exoplanets. We model these subpopulations—including planets with gaseous envelopes, evaporated rocky cores, evaporated icy cores, intrinsically rocky planets, and intrinsically icy planets—in different combinations in order to assess which combinations are most favored by the data. Using cross-validation, we evaluate the support for models that include planets with icy compositions compared to the support for models that do not, finding broad support for both. We find significant population-level degeneracies between subpopulations of water worlds and planets with primordial envelopes. Among models that include one or more icy-core subpopulations, we find a wide range for the fraction of planets with icy compositions, with a rough upper limit of 50%. Improved data sets or alternative modeling approaches may be able to better distinguish between these subpopulations of planets.
Climate Outcomes of Earth-similar Worlds as a Function of Obliquity and Rotation Rate
Authors: He Feng , Merrelli Aronne , L’Ecuyer Tristan S. , Turnbull Margaret C.
Published: July 2022

A set of simulations with a 3D global climate model are performed to investigate the roles of obliquity and rotation period in the habitability of Earthlike exoplanets. The simulations cover the obliquity–rotation parameter space, from 0° to 90° in obliquity and 1–128 days in rotation period. The simulated global mean temperatures are warmest at 45° obliquity with fast rotations, due to the modification of the greenhouse effect from the spatial redistribution of clouds and water vapor. The slow-moving insolation–cloud mechanism, previously found in simulations with slow rotations and zero obliquity, also produces a cooling trend from intermediate obliquity to high obliquity, with the coldest climate occurring at 90° obliquity for all rotation periods. At low obliquities and fast rotation, persistent snow and sea ice can form, producing cooler temperatures. A Climate Habitability metric is defined, based on temperature and precipitation, which compares well with observations when applied to a simulation using Earth’s obliquity and rotation. Over a wider range of obliquity and rotation period, the Climate Habitability ranges from 10% to 70% of the terrestrial area. Overall, the simulated global mean surface temperature shows a much larger spread across the range of simulated rotation periods at 45° obliquity compared to 0° obliquity. Therefore, we conclude that 3D exoplanet simulations using intermediate obliquities (e.g., 45°) instead of 0° will reveal a wider range of possible climate conditions for specific orbital configurations. In addition, Earth’s climate habitability can increase by 25% if the obliquity increases from 23.°5 to 45°.
Inferring the Thermal History of the Intergalactic Medium from the Properties of the Hydrogen and Helium Lyα Forest
Authors: Villasenor Bruno , Robertson Brant , Madau Piero , Schneider Evan
Published: July 2022

The filamentary network of intergalactic medium (IGM) gas that gives origin to the Lyα forest in the spectra of distant quasars encodes information on the physics of structure formation and the early thermodynamics of diffuse baryonic material. Here we use a massive suite of more than 400 high-resolution cosmological hydrodynamical simulations run with the Graphics Processing Unit–accelerated code Cholla to study the IGM at high spatial resolution maintained over the entire computational volume. The simulations capture a wide range of possible IGM thermal histories by varying the photoheating and photoionizing background produced by star-forming galaxies and active galactic nuclei. A statistical comparison of synthetic spectra with the observed 1D flux power spectra of hydrogen at redshifts 2.2 ≤ z ≤ 5.0 and with the helium Lyα opacity at redshifts 2.4 < z < 2.9 tightly constrains the photoionization and photoheating history of the IGM. By leveraging the constraining power of the available Lyα forest data to break model degeneracies, we find that the IGM experienced two main reheating events over 1.2 Gyr of cosmic time. For our best-fit model, hydrogen reionization completes by z

R
≈ 6.0 with a first IGM temperature peak of T
0 ≃ 1.3 × 104 K and is followed by the reionization of He ii that completes by z
R ≈ 3.0 and yields a second temperature peak of T
0 ≃ 1.4 × 104 K. We discuss how our results can be used to obtain information on the timing and the sources of hydrogen and helium reionization.
MHD Turbulent Power Anisotropy in the Inner Heliosphere
Authors: Adhikari L. , Zank G. P. , Zhao L.-L. , Telloni D.
Published: July 2022

We study anisotropic magnetohydrodynamic (MHD) turbulence in the slow solar wind measured by Parker Solar Probe (PSP) and Solar Orbiter (SolO) during its first orbit from the perspective of variance anisotropy and correlation anisotropy. We use the Belcher & Davis approach (M1) and a new method (M2) that decomposes a fluctuating vector into parallel and perpendicular fluctuating vectors. M1 and M2 calculate the transverse and parallel turbulence components relative to the mean magnetic field direction. The parallel turbulence component is regarded as compressible turbulence, and the transverse turbulence component as incompressible turbulence, which can be either Alfvénic or 2D. The transverse turbulence energy is calculated from M1 and M2, and the transverse correlation length from M2. We obtain the 2D and slab turbulence energy and the corresponding correlation lengths from those transverse turbulence components that satisfy an angle between the mean solar wind flow speed and mean magnetic field θ
UB of either (i) 65° < θ
UB < 115° or (ii) 0° < θ
UB < 25° (155° < θ
UB < 180°), respectively. We find that the 2D turbulence component is not typically observed by PSP near perihelion, but the 2D component dominates turbulence in the inner heliosphere. We compare the detailed theoretical results of a nearly incompressible MHD turbulence transport model with the observed results of PSP and SolO measurements, finding good agreement between them.
Formation of Episodic Jets and Associated Flares from Black Hole Accretion Systems
Authors: Čemeljić Miljenko , Yang Hai , Yuan Feng , Shang Hsien
Published: July 2022

Episodic ejections of blobs (episodic jets) are widely observed in black hole sources and usually associated with flares. In this paper, by performing and analyzing three-dimensional general relativity magnetohydrodynamical numerical simulations of accretion flows, we investigate their physical mechanisms. We find that magnetic reconnection occurs in the accretion flow, likely due to the turbulent motion and differential rotation of the accretion flow, resulting in flares and formation of flux ropes. Flux ropes formed inside of 10–15 gravitational radii are found to mainly stay within the accretion flow, while flux ropes formed beyond this radius are ejected outward by magnetic forces and form the episodic jets. These results confirm the basic scenario proposed in Yuan et al. Moreover, our simulations find that the predicted velocity of the ejected blobs is in good consistency with observations of Sgr A*, M81, and M87. All of the processes were found to occur quasiperiodically, with the period being the orbital time at the radius where the flux rope is formed. The predicted period of the flares and ejections is consistent with those found from the light curves or image of Sgr A*, M87, and PKS 1510–089. The possible applications to protostellar accretion systems are discussed.
Utilization of “Perineal Wound Image Application” In Perineal Wound Digital Image Screening
Authors: Girsang Bina Melvia , Elfira Eqlima
Published: July 2022

BACKGROUND: A variety of serious conditions can affect the perineum, from infections that clear up on their own to conditions that are dangerous or add to the patient’s discomfort. Data at the level of each zone are an important factor for determining the area of wound healing. Injury investigations should include the identification of the injury, the calculation of the area of the injury which is generally important in determining treatment. AIM: This study aims to present the findings of determining the characteristics of the perineal wound category and determining the area of the wound using MATLAB programming. MATERIALS AND METHODS: The trial data in this study used 10 digital images with the development of 1000 trials and resulted in an accuracy rate of 86%. Digital image application is designed with 11 categories of perineal wounds that include assessment of wound color and characteristics. RESULTS: The use of the application was carried out by 21 midwife health workers with the results of 81% of applications making it easier for officers to classify wounds, and 85.7% stated that the application could be a guide in making decisions about perineal wound care. Determination of wound categories and perineal wound area in this program proves the ease for health workers in planning appropriate care and treatment. This makes it very easy for users to do programming so that users are not too bothered by programming logic and focus more on the logic of solving problems on a hand. CONCLUSION: The development of innovative perineal wound screening applications will provide convenience in practicality and efficiency of use in the future.
Drug Procurement Analysis of the Ten Biggest Diseases at the Barru District Public Health Center Using the ABC Method
Authors: Handayany Gemy Nastity , Basri Syahrul
Published: July 2022

Management of pharmaceutical preparations at the public health center aims to ensure theavailability of drugs whenever needed, in sufficient quantities and guaranteed quality, to support qualityservices at the public health center so that pharmaceutical services can take place effectively andefficiently. In this study, an analysis of pharmaceutical preparations from the 10 biggest diseases at theBarru District public health center was conducted using the ABC method. This study aims to determinethe ABC value of medicines at the Barru District public health center based on use value, investmentvalue and critical index value in 2020 and to determine which medicines are a priority in the procurementof pharmaceutical preparations at the Barru District public health center.This research is a quantitative research with a descriptive observational study design to obtainan overview of drug procurement at the Barru District public health center in 2020. Data collection wascarried out by reviewing documents with purposive sampling technique on quantitative retrospectivedata in the form of the number of medicines, budgets and medicines use data at Barru District publichealth center that listed on 2020 Health Center LPLPO.The results showed that the analysis of the critical index value of pharmaceutical preparationsat the Barru District public health center resulted in an average percentage of preparations that wereincluded in the ACIV group as much as 16.42%, the BCIV group as much as 16.23% and the CCIV groupas much as 67.35%. There are 5 pharmaceutical preparations that are a priority for the procurement ofpharmaceutical preparations at the Barru District public health center with a total investment value ofRp. 322,838,650.00.
Factors Affecting Early Feeding Using Complementary Foods Breast Milk on Infants Under 6 Months of Age in Nagan Raya Regency Indonesia
Authors: Fitriani Fitriani , Farisni Teungku Nih , Yarmaliza Yarmaliza , Zakiyuddin Zakiyuddin , Reynaldi Fitrah , Safrizal Safrizal , Junaidi Hasrah , Syahputri Veni Nella , Indriasari Rahayu
Published: July 2022

Background: The exclusive breastfeeding of infants aged 0–6 months in the working area of the Jeuram Community Health Center is 27.1%, which is below the target of 80%. The failure of exclusive breastfeeding is directly caused by the early feeding of complementary foods or MP-ASI before babies reach six months of age. Before the baby’s digestive system is fully developed, giving solid food leads to indigestion and constipation. The provision of early complementary feeding to children is influenced by maternal parenting in fulfilling family nutrition. The success of exclusive breastfeeding is related to the mother's ability and belief in breastfeeding her baby. This study analyzes the factors that influence the early MP-ASI for infants <6 months of age.
Methods: This research is a quantitative study with a cross-sectional design. The sample included 54 mothers with a baby <6 months of age. The data analysis was carried out using bivariate, multivariate, and multiple logistic regression analysis.
Results: The results showed that the level of knowledge (p < 0.001), family support (p < 0.001), and socio-cultural factors (p = 0.001) significantly affected the provision of early MP-ASI for infants aged <6 months, while the support of health care workers (p > 0.001) showed no relationship with early MP-ASI. The results of the F-test (p = 0.000, α = 5%) showed that this model is suitable for reducing early MP-ASI. The logistic regression test correlated knowledge, family support, and socio-cultural support with the provision of early MP-ASI. The final model generated is as follows: Y = −1.628 + 1.046 X1 + 0.993 X2 + 2.198 X3.
Conclusion: This study concludes that knowledge, attitude, family support, health care worker support, and socio-cultural support influence early MP-ASI for infants aged <6 months.
Nutritional Intake Education by Peers, Nutritionists, and Combinations to Changes in Nutritional Status in Adolescent Girl in School
Authors: Christiany Irine , Mu’afiro Adin , Waluyo Kiaonarni Ongko , Suparji Suparji
Published: July 2022

Background:  Adolescents pay such close attention to their physical shape and frequently construct their own body image. Low knowledge of nutrients will have an impact on attitudes and behavior related to nutritional status in adolescents. Nutrition education can also help youth gain adolescents' knowledge. Peers are believed to be very influential as educators, so, peer nutritional education in adolescents will be felt positively and have a very significant impact on nutritional status. Aims: This study aims to determine the effect of nutrition education conducted by peers, nutrition, and a combination on the nutritional status of adolescents. Methods and Material: This research used is a quasi-experimental design using a pretest-posttest control group design.The sample consisted of 120 students with an age range of 15–18 years, selected by random sampling. Nutrition education is provided by means of lectures and discussions by peers, nutritionists, or a combination of the two for 1 meeting a week. Statistical analysis used: This study will use the paired t test. Results: The findings revealed that nutrition education delivered by peers had a p value of 0.033 and nutrition education delivered by nutritionists had a p value of 0.003, but there was no significant effect on adolescent nutritional status when nutrition education was delivered in combination with a p value of 0.317. Nutrition education provided by peers is very useful for improving the nutritional status of adolescents. Conclusions: Nutritional education provided by peers is proven to be able to have a positive impact on adolescents because peers are the axis of youth association, so that what is shared and learned by peers will be more easily accepted.
Psycho-Religious Therapy improving the Quality of Life of the Elderly in Nursing Homes
Authors: Setiowati Dwi , Maudina Shova , Jamaludin Jamaludin , Rasdiyanah Rasdiyanah
Published: July 2022

Abstract
BACKGROUND As people get older, body functions in the elderly will decrease so that it will affect their quality of life. One way to improve the quality of life of the elderly is to meet the basic needs of the elderly through a spiritual approach (Islamic psychotherapy). 
 
AIM: This study aims to determine the effect of Zikr on the quality of life of the elderly in nursing homes. 
 
METHODS: This study used a quasi-experimental nonequivalent control group design. The sampling technique used purposive sampling , a total of 10 respondents from the intervention group and 10 respondents from the control group. Quality of life score using the World Health Organization Quality of Life-BREF questionnaire (WHOQOL-BREF). The research analysis used paired t-test and Wilcoxon test for differences in quality-of-life scores of each group and for differences in quality of life between the intervention group and control group using unpaired t-test and Mann-Whitney test. 
 
RESULTS: The effect of psycho-religious therapy (Zikr) on the quality of life of the elderly in the intervention group before and after doing Zikr (p = 0.000), there were differences in 3 domains of quality of life, namely the psychological domain ( p = 0.000), the domain of social relations (p = 0.027), and the environmental domain.  p = 0.010). 
 
CONCLUSION: Psycho-religious therapy (Zikr) affects the quality of life of the elderly in the nursing home and suggests Nursing homes to provide guidance with a religious approach, especially Zikr to improve the quality of life of the elderly.
Impact of Clinical Pharmacist Diabetes Clinic on the Improvement of Health Outcomes in Type 2 Diabetes Subjects
Authors: AlSubaie Nawal , Alsallal Mohannad , AlTwaijri Sulaiman , AlOtaibi Ahmed , AlHarbi Bandar , AlEissa Mohammad , Alrashedi Rana
Published: July 2022

AIM: This study aimed to evaluate the improvement of HbA1c, lipid profile, blood pressure readings, and weight in type 2 diabetes at the clinical pharmacist diabetes clinic (CPDC) in ambulatory care clinic.

METHODS: A retrospective study was conducted at a CPDC; the clinical pharmacist role was to follow-up the referred uncontrolled type 2 diabetes patients and providing comprehensive management.

RESULTS: A total of 419 patients were included the study. The mean ± standard error of the mean (SEM) age was 58.9 ± 0.59 years old. Sixty-two percent of the patients were female. At baseline, mean HbA1C ± SEM was 10.69% ± 0.06%, mean low-density lipoprotein (LDL) ± SEM was 2.66 ± 0.04 mmol/l. After 3 months of follow-up, HgbA1C had a statistically significant improvement by a reduction of 1.69% to be 9% ± 0.09% (95% confidence interval [CI] [1.50–1.87], p < 0.001). Moreover, mean HbA1C had a statistically significant improvement after 6 months of follow-up compared to baseline by 1.78% to be 8.9% ± 0.21% (95% CI [1.33–2.22], p < 0.001). LDL had a statistically significant improvement after 3 months by 0.24 mmol/l to be 2.42 ± 0.04 mmol/l (95% CI [0.15–0.35], p < 0.001) and after 6 months of follow-up by 0.28 mmol/l to be 2.38 ± 0.04 mmol/l (95% CI [0.20–0.36], p < 0.001).

CONCLUSION: The results stated that the clinical pharmacist anticipated care is achievable and had significant effect in the reduction of HbA1C and LDL levels in patients with uncontrolled type 2 diabetes.
Morphological and phylogenetic analyses reveal two new species and a new record of Phyllosticta (Botryosphaeriales, Phyllostictaceae) from Hainan, China
Authors: Zhang Zhaoxue , Liu Xiaoyong , Zhang Xiuguo , Meng Zhe
Published: July 2022

The fungal genus Phyllosticta has been reported from all around the world and accommodates numerous pathogenic and endophytic species isolated from a wide range of plant hosts. Based on multilocus phylogenies from a combined dataset of genes encoding internal transcribed spacer (ITS), large subunit of ribosomal RNA (LSU rDNA), translation elongation factor 1 alpha (TEF1α), actin (ACT) and glycerol-3-phosphate dehydrogenase (GPDH), in conjunction with morphological characteristics, we describe two new species P. oblongifoliaesp. nov. and P. pterospermisp. nov., as well as a new Chinese record P. capitalensis. Their similarity and dissimilarity to morphologically-allied and phylogenetically-related species are also annotated and discussed.
Apprendre à faire genre
Authors: Beaubatie Emmanuel
Published: July 2022

Dans les services publics, les consignes se multiplient pour assurer un accueil adapté aux usagers·ères trans. Mais qu’en est-il concrètement pour les personnes concernées ? Cet article présente une analyse statistique de leurs déclarations de discriminations administratives, ainsi qu’une étude qualitative de leurs vécus et de leurs stratégies face à de tels épisodes. Les jeunes sont particulièrement touché·e·s – quantitativement mais aussi et surtout subjectivement – par les discriminations. Après en avoir fait leurs premières expériences, ils et elles tendent à s’engager dans un apprentissage tactique visant à composer avec les catégories et normes de genre des services publics. Au fil de la vie, les individus sont ainsi amené·e·s, ne serait-ce que par stratégie, à apprendre à se montrer conformes et respectables.
On the optimal decay rate of the weakly damped wave equation
Authors: Conti Monica , Liverani Lorenzo , Pata Vittorino
Published: July 2022

We provide a proof via direct energy estimates of the optimal exponential decay rate of the semigroup generated by the weakly damped wave equation.
An optimization problem in heat conduction with volume constraint and double obstacles
Authors: Li Xiaoliang , Wang Cong
Published: July 2022

We consider the optimization problem of minimizing \begin{document}$ \int_{\mathbb{R}^n}|\nabla u|^2\,{\mathrm{d}}x $\end{document} with double obstacles \begin{document}$ \phi\leq u\leq\psi $\end{document} a.e. in \begin{document}$ D $\end{document} and a constraint on the volume of \begin{document}$ \{u>0\}\setminus\overline{D} $\end{document}, where \begin{document}$ D\subset\mathbb{R}^n $\end{document} is a bounded domain. By studying a penalization problem that achieves the constrained volume for small values of penalization parameter, we prove that every minimizer is \begin{document}$ C^{1,1} $\end{document} locally in \begin{document}$ D $\end{document} and Lipschitz continuous in \begin{document}$ \mathbb{R}^n $\end{document} and that the free boundary \begin{document}$ \partial\{u>0\}\setminus\overline{D} $\end{document} is smooth. Moreover, when the boundary of \begin{document}$ D $\end{document} has a plane portion, we show that the minimizer is \begin{document}$ C^{1,\frac{1}{2}} $\end{document} up to the plane portion.
Thermo-bioconvection flow of Walter's B nanofluid over a Riga plate involving swimming motile microorganisms
Authors: Alqarni M. S.
Published: July 2022

The novelty of the current paper is to study the bioconvection effects in Walter's B nanofluid flow due to stretchable surface, which leads to important properties, i.e., thermal radiation, activation energy, motile microorganisms and convective boundary constraints. The considered analysis is explained via partial differential equations (PDEs), which are first embedded into the dimensionless system of nonlinear ODEs through suitable transformations. The governing equations are solved in MATLAB using the bvp4c solver. The impact of interesting parameters on the velocity field, thermal field, concentration of species and concentration of microorganisms is exhibited in graphical and tabular forms. The velocity field increases for higher estimations of the modified Hartmann and mixed convection parameters. The thermal field decays for a higher magnitude of the Prandtl number, while it is enhanced for a larger deviation of the thermal conductivity parameter. The volumetric concentration of nanoparticles enhances the larger activation energy and thermophoresis parameters. The microorganism concentration diminishes for higher Peclet number. The current model is more useful in various fields such as tissue engineering, recombinant proteins, synthetic biology, and biofuel cell and drug delivery devices.
Traveling wave solutions to a cubic predator-prey diffusion model with stage structure for the prey
Authors: Jiao Yujuan , Yang Jinmiao , Zhang Hang
Published: July 2022

In this paper, we investigate the traveling wave solutions to a cubic predator-prey diffusion model with stage structure for the prey. Firstly, using the upper and lower solutions method we prove the existence and non-existence of weak traveling wave solutions. Furthermore, we prove that the weak traveling wave solutions are actually traveling wave solutions under additional conditions by using Lyapunov function method and LaSalle's invariance principle.
Pharmacological Treatment of Nonalcoholic Fatty Liver Disease: Antidiabetic Agents
Authors: Kim Kyung-Soo
Published: July 2022

Nonalcoholic fatty liver disease (NAFLD) is the most common liver disorders and is associated with various metabolic diseases, including type 2 diabetes mellitus (T2DM). There are no approved drugs for NAFLD, and the only approved treatment option is weight reduction. However, it is not easy to maintain weight loss by lifestyle modification alone; pharmacological treatments are helpful in this regard. As insulin resistance plays an important role in the development of NAFLD, many antidiabetic drugs have been evaluated for treatment of NAFLD. Pioglitazone could be a first-line option to improve nonalcoholic steatohepatitis (NASH) in patients with T2DM to produce some improvement in fibrosis. Glucagon-like peptide-1 receptor agonists show evidence of improving NAFLD/NASH with fibrosis. Metformin and dipeptidyl peptidase-4 inhibitors are not recommended for treating NAFLD in patients with T2DM. Evidence that sodium-glucose cotransporter 2 inhibitors improve NAFLD/NASH with fibrosis in patients with T2DM is emerging.
Solar Cell Effects on Electrical Power Networks
Authors:   Ministry of Electricity and Energy, Middle Egypt Electricity Distribution Company, Minya, Egypt., Eysa Mohamed H. , Diab Ahmed A. Zaki , Nassar Ibrahim A.
Published: July 2022

Recently, interest in solar energy has increased for many reasons, however, connecting solar power stations in distribution networks may cause many problems, so it was necessary to study the impact of connecting photovoltaic systems to distribution networks to provide solutions feasible in practice. This study includes analyzing the performance of a solar power plant with a capacity of 17.2 kWh connected to the low voltage network of the distribution networks according to Egyptian PV-LV code-2014, simulation using MATLAB/Simulink, and cost analysis for connecting SSPV 17.2 kW to LV distribution networks. The system model was built on MATLAB/Simulink and simulated under daily weather conditions to test the system's operational performance. Power quality parameters are measured using C.A. 8336 power quality analyzer at the inverter output side for the PV system at the Minya Electricity Distribution Sector in Minya Governorate, Egypt. The system produces a 29.314 MWh and reaches its initial cost in 7.2 years. The electrical energy produced by the system is directly injected into the low voltage network for loads of the Minya Electricity Distribution Sector building without batteries or storage devices (on-grid).
Low-Cost Portable Device Design for Preventive Maintenance of Rotating Systems
Authors:   Technological Institute of Sonora, Cd. Obregón Sonora, México, García Miguel García , Díaz Rafael A. Figueroa , Alcantar Pedro Cruz , Leyva Pablo A. Limón , Vargas María A. Núñez
Published: July 2022

In the present work, the technological development of a low-cost acquisition device is proposed that allows the simultaneous measurement of vibration amplitude in acceleration and the temperature variable, and that through Bluetooth communication, the parameters are acquired by a cellphone. The data stored in the mobile device will be used for the development and/or improvement of predictive maintenance plans in medium and small companies, whose internal budget does not allow the acquisition of specialized vibration equipment. Finally, the developed App makes it easier for maintenance personnel with minimal knowledge of vibration analysis and thermography to acquire and analyze data insitu and/or offline, using 2D graphing
Critical Success Factors in Information Technology Projects
Authors:   Bina Nusantara University, Information System Management Department, BINUS Graduate Program, Master of Information Systems Management, Jakarta, Indonesia, Yohannes Andreati , Mauritsius Tuga
Published: July 2022

This study focuses on discovering the Critical Success Factors (CSFs) of the implementation of Information Technology (IT) or Information System (IS) related projects as the enablers to many organizational transformations. The core method for developing the CSFs is through Systematic Literature Review (SLR) for compiling past research related to CSFs to come up with a set of CSFs (as independent variables) to achieve IT/IS project success. As a result, five independent variables, namely, Leadership/Project Management; Effective Organization Communication; Project Team Capability/Competence; Methodology, Tools, and Techniques; and Project Documentation emerged and were processed further through the Likert survey method from 132 respondents of IT system implementers in Southeast Asian settings, particularly Indonesia, to study the possible relationship the variables might have toward IT Project Success as the dependent variable. The study's findings revealed that Effective Organization Communication, Project Team Capability/Competence, and Methodology, Tools, and Techniques have a significant relationship with IT Project Success, whereas Leadership/Project Management and Project Documentation are insignificant.
Analysis of Students’ Borrowing Behavior in Local University Library Using Data Mining Technique
Authors:   College of Information and Computing, University of Southeastern Philippines, Davao City, Philippines, Wei Yang , Machica Ivy Kim D. , Arroyo Jan Carlo T. , Sabayle Ma. Luche P. , Delima Allemar Jhone P.
Published: July 2022

This paper analyzes the reader's borrowing behavior data using data mining technique specifically KMeans algorithm and finds the hidden user borrowing characteristics and demand preference information. The dataset used in the study is based on the borrowing behavior data of readers in the library automatic management system of the university. Moreover, this paper discusses the use of Kmeans cluster analysis method in data mining technology to analyze and mine them and finds the readers' reading tendency and personal interest information, in order to provide reference for the development of personalized active service and the optimal allocation of collection resources.