bluuebunny/crossref_metadata_2025_split huggingface dataset:
Artificial Control of Giant Converse Magnetoelectric Effect in Spintronic Multiferroic Heterostructure
Authors: Usami Takamasa , Sanada Yuya , Fujii Shumpei , Yamada Shinya , Shiratsuchi Yu , Nakatani Ryoichi , Hamaya Kohei 
Published: December 2024

AbstractTo develop voltage‐controlled magnetization switching technologies for spintronics applications, a highly (422)‐oriented Co2FeSi layer on top of the piezoelectric PMN‐PT(011) is experimentally demonstrated by inserting a vanadium (V) ultra‐thin layer. The strength of the growth‐induced magnetic anisotropy of the (422)‐oriented Co2FeSi layers can be artificially controlled by tuning the thicknesses of the inserted V and the grown Co2FeSi layers. As a result, a giant converse magnetoelectric effect (over 10−5 s m−1) and a non‐volatile binary state at zero electric field are simultaneously achieved in the (422)‐oriented Co2FeSi/V/PMN‐PT(011) multiferroic heterostructure. This study leads to a way toward magnetoresistive random‐access‐memory (MRAM) with a low power writing technology.
A Framework for Identifying and Validating Indicators to Assess Agribusiness Sustainability: An Emphasis on Greenhouses in Iran
Authors: Gholami Jalal Sahel , Karimi Saeid , Mohammadi Yaser , Yaghoubi Farani Ahmad 
Published: December 2024

ABSTRACTIndicators serve as essential tools for assessing the sustainability of businesses in economic, social, and environmental dimensions. They play a crucial role in guiding businesses toward improvements in their sustainability practices. The main purpose of this study was to identify, localize, and validate sustainability indicators for agribusinesses, with an emphasis on greenhouses in Iran. The study used a mixed‐methods design, combining qualitative and quantitative approaches. First, the literature on the sustainability of agricultural systems and businesses was comprehensively reviewed to identify sustainability indicators, which were then localized by conducting semi‐structured interviews and analyzing their content qualitatively to extract a list from the perspective of experts. The statistical population of this phase comprised scholars of sustainability in the agricultural sector. In the final step, the extracted indicators were validated using the fuzzy Delphi technique. The statistical population for this step was comprised of experts who had practical experience in agribusinesses in addition to possessing knowledge of sustainability. The samples for both the interviews and the fuzzy Delphi technique were chosen purposively. Eventually, 31 indicators were identified within eight components in three sustainability dimensions. The components included resource quality preservation, input management, resource preservation, profitability, vulnerability, social justice and security, knowledge and empowerment, contribution to local development, and safety and health. With only a few studies conducted on the sustainability of greenhouses and no past studies on sustainability indicators for the study area, this study can contribute significantly to the exiting literature on the subject. Indicators identified will serve as a roadmap for achieving sustainability in agribusinesses, especially in greenhouse operations. By assessing sustainability through these indicators, a more profound understanding of the actual status of sustainability can be gained. National and local policies can be developed based on these to increase the level of sustainability of agribusinesses. If these indicators are integrated into the strategic framework of agribusiness, this will definitely improve their sustainability performance and enhance their reputation, build stakeholder trust, and also increase their competitiveness in the growing eco‐conscious market.
Pd(0)/Pd(II) Elektromerie durch Lewis‐Basen Koordination an einem Redox‐Aktiven Silizium Z‐Typ Ligand
Authors: Ansmann Nils , Kerscher Marion , Greb Lutz 
Published: December 2024

AbstractElektromerie (aka. Valenztautomerie) beschreibt den Wechsel der elektronischen Verteilungen zwischen redoxaktiven Liganden und Zentralelementen. Während dieses Phänomen für mehrere Übergangsmetalle gut bekannt ist, konnte das Pd(0)/Pd(II)‐Paar aufgrund der hohen Energie des Pd(0)‐Zustands bisher noch nicht realisiert werden. In dieser Studie beschreiben wir Pd(0)/Pd(II)‐Elektromerie unter Verwendung eines redoxaktiven Bis(phosphanyl‐amidophenolato)silans. Eine starke Silizium‐zentrierte Z‐Typ Interaktion stabilisiert den Pd(0)‐Zustand mit einem oxidierten, dikationischen offenschaligen Singulett‐Liganden, während das Binden einer Lewis‐Base an das Lewis‐azide Silizium zum Verlust der Z‐Typ Wechselwirkung und damit zur intramolekularen Umlagerung der Elektronendichte zum Pd(II)‐Elektromer mit reduziertem Liganden führt. Damit wird ein neuartiges Konzept für die Schaltung des Spinzustands durch die Kombination von Ligand‐Ambiphilie und Redox‐Aktivität eingeführt.
Pd(0)/Pd(II) Electromerism Triggered by Lewis Base Coordination to a Redox‐Active Silicon Z‐Type Ligand
Authors: Ansmann Nils , Kerscher Marion , Greb Lutz 
Published: December 2024

AbstractElectromerism (aka. valence tautomerism) corresponds to the switching of electronic distributions between redox‐active ligands and central elements. While this phenomenon is well established for several transition metals, the Pd(0)/Pd(II) couple could not yet be involved due to the high energy of the Pd(0) state. In this study, we present Pd(0)/Pd(II) electromerism by using a redox‐active bis(phosphanyl‐amidophenolato)silane. Strong silicon‐based Z‐type interaction stabilizes the Pd(0) state with an oxidized dicationic open‐shell singlet ligand while binding of a Lewis base at the Lewis acidic silicon results in the loss of Z‐type interaction and the intramolecular rearrangement to the Pd(II)/reduced ligand electromer. It introduces a novel concept for spin state switching by combining ligand ambiphilicity and redox activity.
Enhanced Performance of Cow Dung Paper Mulch Films Through Cationic Starch Modification for Sustainable Agriculture
Authors: Wang Mengyang , Deng Shuhang , Huang Jun , Li Wenxin , Li Tao , Yang Xiangjun , Wu Xiaoqiang , Mu Yongsong , Yang Kunshan 
Published: December 2024

ABSTRACTThe extensive utilization of plastic mulch and the lack of adequate recycling treatment have caused severe environmental pollution. Plant fiber agricultural mulch film has received much attention in academic research, and the exploration of cow dung fibers as a potential source for mulch film preparation has been rarely discussed. Herein, cow dung fibers were used to create biodegradable paper mulch films. Cationic starch powder was applied to modify the fibers through two methods: immersion and brushing. The starch was dissolved in warm water at concentrations of 1, 2, and 3 wt%, and then heated to 90°C, before application. This treatment resulted in a uniformly coated, biodegradable cow dung paper mulch film. The cationic starch was observed to fill the gaps between fibers, leading to a uniform coating on their surfaces. The optimal tensile strength of the mulch film, which was 3.576 MPa, was achieved with a 2 wt% cationic starch content, suggesting that the starch enhances the bond between fibers and improves the mulch film's overall performance.
Histological and immunohistochemical analysis of gonadal development in the veiled chameleon (Chamaeleo calyptratus)
Authors: Rams‐Pociecha Izabela , Mizia Paulina C. , Piprek Rafal P. 
Published: December 2024

AbstractChameleons are a family of lizards distinguished by several unique features related to their arboreal lifestyles, such as a ballistic tongue, skin color changes, independent movement of both eyes, a prehensile tail, and cleft hands and feet. The veiled chameleon (Chamaeleo calyptratus) has been proposed as a promising model species for studying squamate biology. Despite its potential, the developmental biology of this species remains poorly understood, particularly in terms of gonadal development. This study aimed to elucidate the development of the gonads in the veiled chameleon, from the initial appearance of the gonadal ridges through the sexual differentiation into ovaries and testes, to the establishment of the gonadal structures in both sexes. The study showed the accelerated appearance of gonadal primordia compared to the soma in the veiled chameleon, which is unique and possibly influenced by a prolonged in ovo development period due to the slowed rate of embryonic development in this species. The undifferentiated gonads are characterized by a voluminous medulla and a thin cortex. The process of gonadal sexual differentiation mirrors that seen in other vertebrates. Ovarian differentiation involves the development of a cortex containing germ cells and the loss of these cells in the medulla. Differentiated ovaries are characterized by a thin cortex and early induction of meiosis, leading to the formation of ovarian follicles before hatching. In contrast, testis differentiation involves the loss of germ cells from the cortex, its transformation into a thin epithelium, and the development of germ cell‐containing testis cords in the medulla. The testis cords originate from invagination and remain without forming a lumen during embryogenesis. This comprehensive examination of gonadal development in the veiled chameleon provides important insights into sexual differentiation processes in this species. Moreover, it may stimulate further, broader studies in vertebrate developmental biology.
Coping With Procedural Uncertainty: Firms' Procedural Framings and Political Strategies in the Context of Switzerland's Mission‐Driven Energy Policy
Authors: Reuter Emmanuelle , Überbacher Florian 
Published: December 2024

ABSTRACTThe “green energy” futures advanced in recent mission‐driven (environmental) policies (MDPs) entail considerable procedural uncertainties, leaving the concrete means through which firms may achieve such futures underspecified. Exploring how incumbents address such procedural uncertainty and how this impacts their political strategies, we conducted a comparative case study of Switzerland's four leading electric utilities' interpretations and policymaking influences during the formulation phase of Switzerland's mission‐driven “EnergieStrategie 2050” policy. We inductively developed a novel cultural‐cognitive perspective, which suggests that incumbents mobilize “procedural framing” (past‐future vs. future‐present framing) for coping with procedural uncertainties of a novel MDP. If incumbents mobilize a past‐future (vs. future‐present) framing, they regard the proposed MDP as threat (rather than an opportunity) and resist (rather than support) the policy with their policymaking influences. Our study contributes to the organizational literature on MDPs, to corporate political strategies, and to the organizational literature on future‐oriented meaning‐making.
A Robust Approach for Energy‐Aware Node Localization in Wireless Sensor Network Using Fitness‐Based Hybrid Heuristic Algorithms
Authors: Racharla Sathya Prakash , Jeyaraj Kalaivani 
Published: December 2024

ABSTRACTIn wireless sensor network (WSN) applications, the Received Signal Strength Indicator (RSSI) value from the original signal is determined for computing the distance between the unidentified and beacon nodes in the WSN. However, several factors including noise, diffraction, scattering, and some obstructions affect the precision of the localization techniques. This paper aims to implement a smart node localization scheme in WSNs by estimating the shortest distance between beacon nodes and unknown nodes using the RSSI factor. Initially, the beacon node is positioned at a known position, and the exact location of the unknown node is computed by the hybrid optimization concept. The objective of the proposed node localization method is to reduce the average localization error, and it is derived for assigning the unknown nodes to each beacon nodes. Optimization plays a vital role in providing clear communication among sensor nodes without any hindrance. The hybridized algorithm named as Fitness‐aware Hybrid One‐to‐One with Archery Optimizer (FHOOAO) is used for the positioning of the unknown nodes to each beacon node. After assigning unknown nodes, their best positions are identified by considering the maximum number of hops. Finally, the experimentation is done in three different forms of node positioning in WSN such as S‐shape, H‐shape, and. C‐shape. The simulation experiments demonstrate superior outcomes of the proposed model compared to alternative methods, and it also enhances communication efficiency among sensor nodes.
Synthesizing historical plant collections to identify priorities for future collection efforts and research applications
Authors: Lombardi Elizabeth M. , Faust Harpo , Marx Hannah E. 
Published: December 2024

AbstractTo understand how and where biodiversity is threatened, it is imperative to build historical baselines that accurately characterize the present and past states of biodiversity across environments. Botanical collections provide important ecological, evolutionary, and biogeographic information on the diversity and distributions of plant taxa, yet biases in collection efforts across spatial, temporal, and taxonomic scales are well known. Here, we characterize and quantify trends in botanical collections made from across different abiotic, biotic, and sociopolitical boundaries within the present‐day state of New Mexico. Using a biodiversity informatics approach applied toward a regional case study, we identify opportunities for efficiently improving natural history collection coverage and analyses of botanical diversity. Accurate representation of botanical biodiversity, preserved for future generations through vouchered plant specimens deposited in herbaria, depends on collection decisions made now. This work aims to provide a useful workflow for synthesizing digitized regional botanical collections as researchers prioritize current and future resources in the face of global change.
Prognostic role of TAPSE to PASP ratio in outpatients with left ventricular systolic dysfunction
Authors: Riccardi Mauro , Pagnesi Matteo , Corso Rossana , Sammartino Antonio M. , Tomasoni Daniela , Inciardi Riccardo M. , Lombardi Carlo M. , Adamo Marianna , Nodari Savina , Metra Marco 
Published: December 2024

AbstractAimsFew data are available regarding the role of tricuspid annulus plane systolic excursion to pulmonary artery systolic pressure (TAPSE/PASP), a measurement of right ventricular to pulmonary artery coupling, in patients with chronic heart failure and left ventricular systolic dysfunction.Methods and resultsThis retrospective single‐centre study included outpatients with left ventricular systolic dysfunction (ejection fraction ≤ 50%) evaluated between January 2022 and December 2022. TAPSE/PASP was evaluated as a continuous variable and as tertiles according to its value on the first visit. The primary outcome of the study was a composite of all‐cause mortality or heart failure (HF) events at the last available follow‐up.ResultsA total of 642 patients were included (mean age 71 ± 13 years, 78% male, mean left ventricular ejection fraction 40% [interquatile range 35–46]). Patients with lower TAPSE/PASP had more co‐morbidities (i.e., atrial fibrillation, chronic kidney disease or previous cardiovascular implantable electronic device), an higher New York Heart Association class (P < 0.001), more signs of congestion (P = 0.007), and had more probability to receive intravenous furosemide during the visit (P < 0.001). After a median follow‐up of 474 days [interquartile range 392–507 days], a total of 51 patients (8.0%) died (with 24 patients [3.8%] experiencing cardiovascular‐related deaths), a total of 179 patients (28.1%) experienced a composite outcome, and 158 patients (24.8%) had HF events. Kaplan–Meier analysis showed that the estimated 1‐year rate of the primary outcome was higher in the lowest tertile (38.0%), as compared with the intermediate (19.6%) and highest tertiles (14.9%; P‐value log‐rank <0.001). TAPSE/PASP ratio as a continuous variable was independently associated with the primary outcome (adjusted hazard ratio for 0.1 mm/mmHg increase 0.91, 95% CI 0.84–0.98, P = 0.009), predominantly driven by a higher risk of HF events during follow‐up. Analysing the impact of TAPSE/PASP tertiles on the primary outcome, an independent associated was confirmed at multivariate analisys for the highest versus lowest tertile (adjusted hazard ratio 0.61, 95% CI 0.38–0.99, P = 0.044).ConclusionsTAPSE/PASP was independently associated with mortality or HF events among ambulatory patients with left ventricular systolic dysfunction.
Multi‐Night Electroencephalography Reveals Positive Association Between Sleep Efficiency and Hippocampal Subfield and Entorhinal Cortex Volumes in Healthy Aging
Authors: Keresztes Attila , Bankó Éva M. , Báthori Noémi , Tomacsek Vivien , Varga Virág Anna , Nárai Ádám , Nemecz Zsuzsanna , Dénes Ádám , Gál Viktor , Hermann Petra , Simor Péter , Vidnyánszky Zoltán 
Published: December 2024

ABSTRACTAge‐related atrophy of the human hippocampus and the enthorinal cortex starts accelerating at around age 60. Due to the contributions of these regions to many cognitive functions seamlessly used in everyday life, this can heavily impact the lives of elderly people. The hippocampus is not a unitary structure, and mechanisms of its age‐related decline appear to differentially affect its subfields. Human and animal studies have suggested that altered sleep is associated with hippocampal atrophy. Yet, we know little about subfield specific effects of altered sleep in healthy aging and their effect on cognition. Here, in a sample of 118 older middle‐aged and older adults (Mage = 63.25 y, range: 50–80 y), we examined the association between highly reliable hippocampal subfield and entorhinal cortex volumetry (n = 112), sleep measures derived from multi‐night recordings of portable electroencephalography (n = 61) and episodic memory (n = 117). Objective sleep efficiency—but not self‐report measures of sleep—was associated with entorhinal cortex volume when controlling for age. Age‐related differences in subfield volumes were associated with objective sleep efficiency, but not with self‐report measures of sleep. Moreover, participants characterized by a common multivariate pattern of subfield volumes that contributed to positive sleep–subfield volume associations, showed lower rates of forgetting. Our results showcase the benefit of objective sleep measures in identifying potential contributors of age‐related differences in brain‐behavior couplings.
Therapeutic DBS for OCD Suppresses the Default Mode Network
Authors: Slepneva Natalya , Basich‐Pease Genevieve , Reid Lee , Frank Adam C. , Norbu Tenzin , Krystal Andrew D. , Sugrue Leo P. , Motzkin Julian C. , Larson Paul S. , Starr Philip A. , Morrison Melanie A. , Lee A. Moses 
Published: December 2024

ABSTRACTDeep brain stimulation (DBS) of the anterior limb of the internal capsule (ALIC) is a circuit‐based treatment for severe, refractory obsessive‐compulsive disorder (OCD). The therapeutic effects of DBS are hypothesized to be mediated by direct modulation of a distributed cortico‐striato‐thalmo‐cortical network underlying OCD symptoms. However, the exact underlying mechanism by which DBS exerts its therapeutic effects still remains unclear. In five participants receiving DBS for severe, refractory OCD (3 responders, 2 non‐responders), we conducted a DBS On/Off cycling paradigm during the acquisition of functional MRI (23 fMRI runs) to determine the network effects of stimulation across a variety of bipolar configurations. We also performed tractography using diffusion‐weighted imaging (DWI) to relate the functional impact of DBS to the underlying structural connectivity between active stimulation contacts and functional brain networks. We found that therapeutic DBS had a distributed effect, suppressing BOLD activity within regions such as the orbitofrontal cortex, dorsomedial prefrontal cortex, and subthalamic nuclei compared to non‐therapeutic configurations. Many of the regions suppressed by therapeutic DBS were components of the default mode network (DMN). Moreover, the estimated stimulation field from the therapeutic configurations exhibited significant structural connectivity to core nodes of the DMN. Based upon these findings, we hypothesize that the suppression of the DMN by ALIC DBS is mediated by interruption of communication through structural white matter connections surrounding the DBS active contacts.
Resting‐State Network Plasticity Following Category Learning Depends on Sensory Modality
Authors: Tabrik Sepideh , Dinse Hubert R. , Tegenthoff Martin , Behroozi Mehdi 
Published: December 2024

ABSTRACTLearning new categories is fundamental to cognition, occurring in daily life through various sensory modalities. However, it is not well known how acquiring new categories can modulate the brain networks. Resting‐state functional connectivity is an effective method for detecting short‐term brain alterations induced by various modality‐based learning experiences. Using fMRI, our study investigated the intricate link between novel category learning and brain network reorganization. Eighty‐four adults participated in an object categorization experiment utilizing visual (n = 41, with 20 females and a mean age of 23.91 ± 3.11 years) or tactile (n = 43, with 21 females and a mean age of 24.57 ± 2.58 years) modalities. Resting‐state networks (RSNs) were identified using independent component analysis across the group of participants, and their correlation with individual differences in object category learning across modalities was examined using dual regression. Our results reveal an increased functional connectivity of the frontoparietal network with the left superior frontal gyrus in visual category learning task and with the right superior occipital gyrus and the left middle temporal gyrus after tactile category learning. Moreover, the somatomotor network demonstrated an increased functional connectivity with the left parahippocampus exclusively after tactile category learning. These findings illuminate the neural mechanisms of novel category learning, emphasizing distinct brain networks' roles in diverse modalities. The dynamic nature of RSNs emphasizes the ongoing adaptability of the brain, which is essential for efficient novel object category learning. This research provides valuable insights into the dynamic interplay between sensory learning, brain plasticity, and network reorganization, advancing our understanding of cognitive processes across different modalities.
Episodic Aspects of a Path Navigated Through Hippocampal Neurobiology
Authors: Morris Richard G. M. 
Published: December 2024

ABSTRACTAs requested by the editors of this special issue of Hippocampus on Scientific Histories of Hippocampal Research, this review provides a detailed personal perspective and historical background on the research involved in a number of findings. The review includes description of the development of the water maze and its use in providing evidence to support the role of the hippocampus in spatial memory function. The review also describes how the water maze was then used in further work to support the proposal that NMDA‐dependent synaptic modification in the hippocampus mediates the encoding of new spatial memories. This personal history gives a perspective on the convergence of different streams of physiological, biochemical, theoretical and behavioral research that resulted in these findings on hippocampal function.