bluuebunny/crossref_metadata_2025_split huggingface dataset:
Airline Responses to the COVID-19 Collapse: Applying Learning to an Unprecedented Crisis
Authors: Greve Henrich R. 
Published: July 2024

Organizational learning is a result of knowledge creation, retention, and transfer. An unanswered question in learning theory is whether learning occurs when firms face an unprecedented and urgent crisis as such events leave little time for knowledge creation, and they complicate knowledge transfer and retention. The COVID-19 pandemic is an example because it saddled firms with consequences ranging from liquidity crises to worsened strategic position, and it required urgent responses. Operational and strategic responses had to be made without recent experience from similar situations and with high uncertainty about the duration and severity of the crisis. This paper extends learning theory by developing an argument that such extreme events allow knowledge transfer and retention that current learning theory would not predict. The new predictions are tested on the airline industry, which was severely affected by the mobility restrictions imposed by states. The findings show organizational learning even when facing an unprecedented crisis, but different learning rules were used for reversible and irreversible actions, suggesting that decision makers search for adaptive choices and are mindful of their strategic consequences. Funding: This research received funding from the Hoffman Global Institute for Business and Society. Supplemental Material: The online appendix is available at https://doi.org/10.1287/stsc.2023.0083 .
A Paradox of Telecommuting and Staggered Work Hours in the Bottleneck Model
Authors: Sakai Takara , Akamatsu Takashi , Satsukawa Koki 
Published: July 2024

We study the long- and short-term effects of telecommuting (TLC), staggered work hours (SWH), and their combined scheme on peak-period congestion and location patterns. In order to enable a unified comparison of the schemes’ long- and short-term effects, we develop a novel equilibrium analysis approach that consistently synthesizes the long-term equilibrium (location and percentage of telecommuting choice) and short-term equilibrium (preferred arrival time and departure time choice). By exploiting their special mathematical structures similar to optimal transport problems, we derive the closed-form solution to the long- and short-term equilibrium while explicitly considering their interaction. These closed-form solutions elucidate the discrepancies between the effects of each scheme and uncover a paradoxical finding: the introduction of SWH, in conjunction with TLC, may increase the total commuting costs compared with the scenario with only TLC, without yielding any improvement in worker utility. History: This paper has been accepted for the Transportation Science Special Issue on ISTTT25 Conference. Funding: This work was supported by Council for Science, Technology and Innovation (CSTI), Cross-ministerial Strategic Innovation Promotion Program (SIP), the 3rd period of SIP “Smart Infrastructure Management System” [Grant JPJ012187] (Funding agency: PublicWorks Research Institute, Japan). This work was also supported by Japan Society for the Promotion of Science (JSPS) KAKENHI [Grants JP20J21744, JP21H01448, JP24K00999, JP20K14843, and JP23K13418] and the Support Program for Urban Studies of the Obayashi Foundation. Supplemental Material: The online appendix is available at https://doi.org/10.1287/trsc.2024.0520 .
Nemateriální faktory působící na sjednané ceny rodinných domů v Brně
Authors: Doležalová Monika , Pospíšil Karel 
Published: July 2024

Článek se zabývá problematikou související s cenami nemovitostí, konkrétně vlivem vytipovaných nemateriálních faktorů na cenu rodinných domů. Pro účely tohoto článku nemateriálními faktory rozumíme takové faktory, které nemají původ v nemovitosti samotné, nýbrž jsou odvozeny od jejího umístění, popřípadě od jejího okolí. Materiální faktory jsou pak ty, které souvisejí s velikostí domu i pozemku, s jeho provedením a stavem apod.
Pro vytipování relevantních faktorů byly využity rešerše publikací, včetně zahraničních, a také informace z již dříve provedených výzkumů a sociologických studií zabývajících se bydlením v Brně. Inspirativním zdrojem informací byl i archiv znaleckých posudků Ústavu soudního inženýrství. Provedena byla analýza veřejně dostupných inzerátů rodinných domů s cílem zjistit, jaké vlastnosti inzerenti považují za podstatné při popisu nabízených nemovitostí.
Zájmovou oblastí prezentovaného článku je město Brno. Důvodem pro volbu této lokality je znalecká praxe autorů článku v oboru oceňování nemovitostí zejména v tomto území. Konečná databáze obsahuje 147 prodejů rodinných domů. V databázi je posuzováno celkem dvanáct nemateriálních faktorů. V analýze jsou zahrnuty rovněž materiální faktory, které byly zvoleny tak, aby výstižně charakterizovaly rodinný dům.
Těžištěm článku je mnohorozměrný lineární regresní model s metodou odhadu OLS (metodou nejmenších čtverců) popisující závislost ceny na vysvětlujících proměnných (v této práci označovaných jako faktory). Po konfrontaci získaných dat s regresním modelem byla potvrzena hypotéza, že alespoň jeden nemateriální faktor je pro cenu rodinných domů na zvolené hladině významnosti statisticky významný. Rovněž se potvrdil předpoklad hypotézy, že nemateriální faktory jsou v součtu intenzity svého působení s to vysvětlit alespoň 10 % ceny rodinného domu.
Přepočet obvyklé ceny stavebních prací k jinému datu
Authors: Háva Karla 
Published: July 2024

Článek souvisí s oceněním stavebních materiálů a prací obvyklou cenou. Výše těchto nákladů je v praxi často dovozována kalkulací nákladů pomocí směrných cen.
Článek se zabývá způsoby přepočtu obvyklé ceny stavebních prací z jednoho data k datu jinému, tedy přepočtem do jiné cenové úrovně s ohledem na změny cen stavebních prací v čase. Zaměřuje se na cenové indexy a na příkladu přecenění rozpočtu stavebního objektu ukazuje jejich použití v praxi.
Přepočet ceny je proveden opětovným přeceněním položkového rozpočtu směrnými cenami v nové cenové úrovni a čtyřmi způsoby indexace. Protože jsou směrné ceny ve znaleckých posudcích znalci uvažovány za ceny obvyklé ve stavebnictví v ČR, je rozpočet ve směrných cenách ve výši obvyklé ceny uvažován jako verifikační hodnota pro indexované ceny rozpočtu.
Pro zjištění současného stavu poznání o dané tématice byla provedena literární rešerše. Literární rešerše odhalila několik souvisejících výzkumů, avšak žádný z nich se nezabýval výzkumnými otázkami tohoto článku.
Z výsledků výzkumu zabývajícího se analýzou změny obvyklé ceny stavebních prací v čase vyplývá, že indexace cen stavebních prací funguje za optimálních podmínek na trhu. Pokud se výrazně mění tržní podmínky, potom indexaci cen pro přecenění není vhodné použít a je při přepočtu ceny do nové cenové úrovně zapotřebí opětovně vypočítat náklady na stavební práce. Vypočítaný průměrný rozdíl indexovaných cen oproti ceně položkového rozpočtu v nové cenové úrovni byl vypočítán 15 % z ceny položkového rozpočtu.
Praktické uplatnění článku autorka spatřuje v prohloubení poznání o možnosti využití indexace cen. Znalci tato zjištění mohou uplatnit například při stanovení obvyklé ceny stavebních prací při zjištění nákladů na opravu či stanovení víceprací či méněprací.
Elaboración de papel con fibra virgen y reciclada reforzada con celulosa nanofibrilada de Guadua angustifolia
Authors: Atúncar Vilela Winnifer Brunella , Gonzales Mora Hector Enrique , Arango Sergio , Cárdenas-Oscanoa Aldo Joao 
Published: July 2024

La nanocelulosa ha demostrado prometedoras mejoras en las propiedades tecnológicas de diversos productos dentro de la industria papelera. El objetivo de esta investigación fue evaluar la influencia de la celulosa nanofribrilar (CNF) de bambú (Guadua angustifolia Kunth.) en las propiedades físico-mecánicas de papel elaborado con fibra virgen de bambú, fibras recicladas de Double Kraft Liner (DKL) y una mezcla de ambas. La CNF fue obtenida mediante TEMPO a una desfibrilación de 25 000 RPM. Luego, fue adicionada en concentraciones de 0, 2, 4 y 6 % para cada tipo de papel. Los resultados, analizados estadísticamente, demostraron que el espesor, la permeabilidad y la resistencia al rasgado disminuyeron, mientras que la densidad y la resistencia a la tensión y al plegado presentaron un aumento conforme se incrementaba la concentración de CNF. Debido a las características de la CNF, el potencial uso del papel elaborado con este aditivo es el de envoltura para alimentos.
Time Preferences and Lunar New Year: An Experiment
Authors: Nguyen Tam L. , Weber Bryan S. , Huynh Luu Duc Toan 
Published: July 2024

Abstract
We conduct an experiment to examine how the attitude toward time preference changed when there was a time-related occasion, specifically the Lunar New Year. We anticipated that individuals would be more patient as measured by a battery of questions after the New Year. However, we find that individuals only appear more patient when those questions pose the amount of time they have to wait in year increments rather than other units of time. More experimentation is necessary to identify the peculiarities of framing questions around this “New Years Effect.”
Reduced resonance schemes and Chen ranks
Authors: Aprodu Marian , Farkas Gavril , Raicu Claudiu , Suciu Alexander I. 
Published: July 2024

Abstract
The resonance varieties are cohomological invariants that are studied in a variety of topological, combinatorial, and geometric contexts.
We discuss their scheme structure in a general algebraic setting and introduce various properties that ensure the reducedness of the associated projective resonance scheme.
We prove an asymptotic formula for the Hilbert series of the associated Koszul module, then discuss applications to vector bundles on algebraic curves and to Chen ranks formulas for finitely generated groups, with special emphasis on Kähler and right-angled Artin groups.
Geological genesis and identification of high-porosity and low-permeability sandstones in the Cretaceous Bashkirchik Formation, northern Tarim Basin
Authors: Xie Runcheng , Fu Shuangjun , Liang Honggang , Deng Kun , Yin Shuai , Ma Tingting , Li Siyuan , Cai Wenli 
Published: July 2024

Abstract
The genesis and prediction of high-porosity and low-permeability sandstone reservoirs are hot spots in oil and gas geology research worldwide. High-porosity and low-permeability sandstone reservoirs are developed in the Cretaceous Bashkirchik Formation of the Luntai Uplift in the northern Tarim Basin, China. In this article, we conducted a systematic study on the geological origin and logging identification of high-porosity and low-permeability tight sandstone based on core observation, thin section, logging index response, and mathematical discrimination methods. The results show that the K1bs sandstone segment in the study area generally contains calcium carbonate, which mainly comes from carbonate rock debris and calcite cement. Calcite cement mainly fills the pores between primary particles, and it is the main factor leading to the densification of the reservoir. The geological origin of the formation of low-permeability layer is mainly due to the early cementation of carbonate, and the development mode of the low-permeability layer is “high content of calcium debris → severe calcium cementation → poor petrophysical properties → formation of low-permeability layer.” The low-permeability layer has the characteristics of high gamma and high resistivity, and the multi-parameter discriminant method established based on the Fisher criterion has a good identification effect for the low-permeability layer. The low-permeability layer has a small thickness, poor stability and continuity, and strong longitudinal heterogeneity, thus it can form a low-permeability baffle inside the reservoir, which greatly reduces the oil and gas migration capacity.
Quantitative determination of the antibacterial activity of licorice (Glycyrrhiza glabra) and tetracycline gel against Aggregatibacter actinomycetemcomitans (Aa), Porphyromonas gingivalis (Pg) and Prevotella intermedia (Pi) – a microbiological in vitro study
Authors: Ramesh Konathala S. V. , Gokul Mopati Nishanth Reddy , Penmetsa Gautami S. , Sruthima Gottumukkala N. V. S. , Mohan Kumar Pasupuleti , Swetha Pasupuleti , Vivek Bypalli 
Published: July 2024

Abstract

Objectives
The aim of this study was to evaluate and compare the antibacterial efficacy of licorice gel and tetracycline gel against Aggregatibacter actinomycetemcomitans, Porphyromonas gingivalis and Prevotella intermedia.

Methods
An indigenously prepared 50 μL licorice and tetracycline gel was subjected to antibacterial sensitivity test (thrice) against Aa, Pg, Pi by agar well diffusion method using Brain Heart Infusion media. Colonies of Aa, Pg, Pi was transferred into broth and incubated at 37 °C for 24 h and diameter of inhibition zone was measured.

Results
The drug release profile of licorice gel at six regular intervals was higher when compared to tetracycline. MIC of licorice gel (50 μg/mL) against Aa (14 mg), Pg (7 mg), Pi (7 mg) respectively. The diameter of inhibition zone of licorice gel was significant against Aa when compared to tetracycline gel. However, tetracycline gel exhibited significant diameter of inhibition zone against Pg and Pi when compared to licorice gel. There was a statistical significance difference between licorice and tetracycline gel against Aa (p=0.043*), Pg (p=0.037*), Pi (p=0.046*) while assessing antibacterial sensitivity test.

Conclusions
Licorice gel has anti-inflammatory and anti-microbial properties which can act against periodontal pathogens and can be considered in treating periodontal disease at low concentrations. Therefore, it can be used as an adjunctive local drug delivery agent to non-surgical periodontal therapy (NSPT) in treating periodontal disease.
The crystal structure of 2,2′-(2,2-diphenylethene-1,1-diyl)bis(1,4-dimethoxybenzene), C30H28O4
Authors: Li Ya-Xuan , Li Jian-Qiao , Zeng Fei 
Published: July 2024

Abstract
C30H28O4, triclinic,

P

1
‾

$P\overline{1}$

(no. 2), a = 9.473(14) Å, b = 9.775(14) Å, c = 14.43(2) Å, α = 100.354(17)°, β = 91.053(17)°, γ = 94.062(17)°, V = 1310(1) Å3, Z = 2, R
gt(F) = 0.0517, wR
ref(F
2) = 0.1803, T = 296(2) K.
Measurement of gross alpha radioactivity levels and estimation of annual effective dose in hazelnut kernels
Authors: Tektaş Gözde , Canbaz Öztürk Buket 
Published: July 2024

Abstract
The present study investigates gross alpha (GA) radioactivity levels in hazelnut kernels purchased from markets in Türkiye. 10 different hazelnut samples were crushed and made ready for counting. The alpha counts were obtained via ELSEC 7286 low level alpha counter with ZnS scintillator and EMI 6097B photomultiplier tube. The samples were placed in front of the detector to acquire the counts. All samples were counted isochronously. In addition to the GA activity measurement, total annual effective dose (AED) value for different age groups owing to ingestion was calculated for each sample. It was observed that the GA radioactivity levels in the samples were quite low, and total AED values were considerably lower than the WHO worldwide average AED value (290 μSv/year).
Evaluating the strength loss and the effectiveness of glass and eggshell powder for cement mortar under acidic conditions
Authors: Liu Hao , Khan Suleman Ayub , Amin Muhammad Nasir , Althoey Fadi , Qadir Muhammad Tahir 
Published: July 2024

Abstract
The cementitious composite’s resistance to the introduction of harmful ions is the primary criterion that is used to evaluate its durability. The efficacy of glass and eggshell powder in cement mortar exposed to 5% sulfuric acid solutions was investigated in this study using artificial intelligence (AI)-aided approaches. Prediction models based on AI were built using experimental datasets with multi-expression programming (MEP) and gene expression programming (GEP) to forecast the percentage decrease in compressive strength (CS) after acid exposure. Furthermore, SHapley Additive exPlanations (SHAP) analysis was used to examine the significance of prospective constituents. The results of the experiments substantiated these models. High coefficient of determination (R
2) values (MEP: 0.950 and GEP: 0.913) indicated statistical significance, meaning that test results and anticipated outcomes were consistent with each other and with the MEP and GEP models, respectively. According to SHAP analysis, the amount of eggshell and glass powder (GP) had the most significant link with CS loss after acid deterioration, showing a positive and negative correlation, respectively. In order to optimize efficiency and cost-effectiveness, the created models possess the capability to theoretically assess the decline in CS of GP-modified mortar across various input parameter values.
A szem a technológia elfogadás tükre: az önvezető járművek iránti bizalom szegmentált megragadása szemmozgás-követéssel
Authors: Nagy Barbara , Prónay Szabolcs , Lukovics Miklós 
Published: July 2024

A TANULMÁNY CÉLJA
A mainstream technológia elfogadási modellek (TAM, UTAUT) alapján magállapítható, hogy a technológia elfogadást befolyásoló tényezők közül markánsan kiemelkedik a bizalom. Annak ellenére, hogy a nemzetközi szakirodalom azonosította a bizalmat, mint az önvezető járművek technológia elfogadásának egyik kiemelt tényezőjét, kevés ehhez kapcsolódó empirikus felmérés készült. A rendelkezésre álló tanulmányok leginkább hagyományos megkérdezéses módszerrel vizsgálják a társadalmat, mint egy nagy homogén csoportot, azonban arról kevés információval rendelkezünk, hogy a bizalom miként mutatkozik meg a fiziológiai reakciókban, illetve arról is, hogy eltérő jellegzetességekkel rendelkező csoportok esetében kimutatható-e valamilyen különbözőség. Mindebből adódóan kutatásunk fő célkitűzése az önvezető járművekhez kapcsolódóan a bizalom, mint a technológia elfogadás egyik kulcsfontosságú tényezőjének neurotudományi módszerrel történő vizsgálata az egyes fogyasztói csoportok esetében külön-külön.
ALKALMAZOTT MÓDSZERTAN
A kutatásban valós idejű szemmozgáskövetéses méréseket alkalmaztunk a módszertanhoz képest kimagaslóan nagy, 102 elemű mintán, melyet önbevalláson alapuló felméréssel és fókuszcsoportos interjúkkal egészítettünk ki. Laboratóriumi körülmények között végeztünk olyan méréseket, amelyek során alanyaink önvezető járművek belső kameráival készült videókat néztek. Az egyének szemmozgásait követve vizsgáltuk a fixációk számát és összetett hosszát, valamint a pupilla mozgását.
LEGFONTOSABB EREDMÉNYEK
A fixációk száma, összetett hossza, valamint a pupilla tágulás alapján empirikusan verifikáltuk, hogy a „hagyománykedvelő elutasító” szegmentum bizalmi szintje a legalacsonyabb, valamint a tekintetek iránya és a fixációk száma alapján azt, hogy mind az öt szegmentum bizalmi szintje relatíve alacsony. A bizalmi szint növekedése kimutatható akkor, ha az alanyok többlet információhoz jutnak az utazásról (tablet, megismételt jelenetsor). Fontos megállapításunk továbbá, hogy az önbevalláson alapuló bizalmi szint nem minden esetben tükröződik a szemmozgásos eredményekben.
GYAKORLATI JAVASLATOK
A bemutatott szegmensek mentén illetve az alkalmazott módszertan által jobban megérthetjük a potenciális fogyasztók attitűdjeit, így az önvezető járművek iránti bizalom erősítéséhez kapcsolódó erőfeszítések (például edukációs kampányok) hatékonysága növelhető, ami e technológia elterjedését támogathatja. Az általános bizalomépítés mellett javasolt célzott kampányok által csökkenteni az egyes szegmensekre jellemző bizalmatlanságot.
Köszönetnyilvánítás: Készült a K 137571 azonosító számú K_21 „OTKA” Kutatási témapályázat támogatásával.
Impact of Calcined Natural Clinoptilolite Zeolite on Hydration Kinetics and Shrinkage of Cementitious Materials
Authors: Islam M. Shariful , Mohr Benjamin J. 
Published: July 2024

Abstract
Previous literature has provided contradictory results, so we present the current investigation to provide additional information to assess the suitability of using soak calcination as a pretreatment method to increase the performance of calcined zeolite when used as the supplementary cementitious material. In this study, natural clinoptilolite zeolite was calcined for three hours at 200°C, 400°C, 600°C, 800°C, and 1,000°C, and the effects of calcination on different physical and chemical properties were observed using a range of experimental tests. The impacts of calcined zeolite were investigated in the hydrated system with the replacement of portland cement up to 20 % by mass on hydration kinetics (i.e., heat of hydration, setting time, chemical shrinkage, degree of hydration), drying shrinkage, and compressive strength. Results revealed that calcination minorly decreased the crystallinity, particle size, and peak pore size of the zeolite, leading to a slightly increased external specific surface area, whereas it increased the rate of moisture absorption and pH of zeolite particles. In the hydrated cementitious system, calcined zeolite reduced the workability and heat of hydration and retarded the initial setting time. The calcined zeolite particles absorbed a part of the water from the fresh mixture and expanded volumetrically, which led to a negative volume of chemical shrinkage up to the final setting time and increased the drying shrinkage. As the dosages of calcined zeolite increased, the compressive strength substantially decreased because of the lower degree of hydration. Overall, soak calcination pretreatment decreased the reactivity of clinoptilolite zeolite particles and impacted the performance of calcined zeolite in the blended system.
Enhancing Sustainability in Construction: An Evaluation of Lightweight Concrete with Sintered Fly Ash and Waste Marble Sand
Authors: Dhemla Pankaj , Somani Prakash , Swami Bajrang Lal 
Published: July 2024

Abstract
Marble waste and fly ash are industrial waste, and disposal of these wastes is a big challenge for environmental sustainability. In this study, we explore an innovative approach to sustainable construction by utilizing industrial by-products: sintered fly ash aggregate (SFA) and waste marble sand in lightweight aggregate concrete (LWAC). This study used SFA as a coarse aggregate, whereas river sand was partially replaced by waste marble sand (10–50 %). The waste marble sand modified LWAC has been investigated for mechanical and durability properties. The test related to permeability like water absorption, sorptivity, permeability, and drying shrinkage has been performed. Mercury intrusion porosimetry test was performed to validate durability results. The results indicate that 30 % of river sand can be replaced with waste marble sand as it improves the overall performance of LWAC. Our research contributes to global sustainability efforts by providing a method to reduce industrial waste through its incorporation in building materials. This study not only addresses the urgent need for environmental preservation but also offers potential enhancements in the mechanical properties of LWAC, making it a viable and eco-friendly option in the construction industry worldwide.