bluuebunny/crossref_metadata_2025_split huggingface dataset:
Social presence and e-commerce B2B chat functions
Authors: Koponen Jonna Pauliina , Rytsy Saara 
Published: April 2020

Purpose
Currently, online chat is in common use in e-commerce. By adding social interaction to the online context, companies hope to increase customers’ purchasing intentions. However, previous studies have not investigated how social presence is embedded in online business-to-business (B2B) chat conversations between buyers and sellers. Moreover, the functions of online chat in B2B sales have not been investigated.

Design/methodology/approach
The data was collected at a case company over the course of four years, from which the authors analyzed 157 online chat conversations between buyers (n = 157) and sellers (n = 9) with a theory-driven thematic analysis. In addition, data from the company’s customer relationship management system was collected to specify buyer types.

Findings
The results reveal that social presence was embedded in online B2B chat via buyers’ interactive, affective and relationship maintenance responses. Social presence differed depending on the type of buyer, with only existing customers having relationship maintenance responses. E-commerce B2B chat functions can be described as multiple and changing depending on the buyer–seller relationship stage.

Research limitations/implications
Having data only from one case company limits the results to one type of industry.

Practical implications
The results can be used in sales training and when developing online chat services.

Originality/value
Results bring scientific utility to B2B sales and marketing research, as the authors build a bridge between social presence, the existing theoretical model on B2B buyer–seller relationship development and online chat as a communication medium. Other researchers may use this understanding when exploring B2B buyer–seller interaction in different digitalized communication media.
Unbundling practice: the unbundling of big deal journal packages as an information practice
Authors: Ivanov Asen O. , Johnson Catherine Anne , Cassady Samuel 
Published: April 2020

PurposeThe purpose of this article is to introduce a theoretical framework and approach for studying the evaluation and decision-making practices through which academic librarians attempt to reduce the cost of electronic journal subscriptions – an organizational practice known as the unbundling of big deal journal packages.Design/methodology/approachThe article presents a literature-based conceptual analysis of several fields to delineate the elements of the practice of unbundling of big deal journal packages. Beyond analysing the prior literature, the discussion is supported by empirical findings from a pilot study on the topic conducted by two of the article's authors.FindingsThe main finding of the article is that the unbundling of big deal packages is a case of what sociologist refers to as decision-making in a social context. By reviewing previous studies, the article identifies the social and material elements constitutive of this practice. This, in turn, allows to develop questions and concepts for future research on the topic and to position it as an area of inquiry within the field of information behaviour/practices.Originality/valueThe article is the first attempt to conceptualize the unbundling of big deal journal packages by highlighting its phenomenological status as a type of information practice. In addition, the article proposes a research approach for studying this type of information practice by drawing on insights from the information behaviour/practice literature and enriching them through practice theory contributions in organizational studies and sociology.
Intellectual capital in rehabilitation organizations
Authors: Hatamizadeh Nikta , Ahmadi Mohammad , Vameghi Roshanak , Hosseini Mohammad Ali 
Published: April 2020

PurposeThis paper aims to clear ambiguities regarding the definition of intellectual capital and its components in the evaluation of rehabilitation organizations.Design/methodology/approachA preliminary definition of intellectual capital and its three domains of human, relational and structural capital and separate lists of proposed components for each domain was developed based on the results of a previous study. Fourteen experts in rehabilitation, health management and management engaged in Delphi rounds to reach agreed-upon definitions. Their ideas on relevance and the measurements of each proposed component in the assessment of intellectual capital in rehabilitation organizations were gathered by a questionnaire.FindingsIntellectual capital was defined as “The capital that emerges from the interaction of human resources’ ‘ability to think’ and to ‘create ideas’ with ‘a favorable internal and external organizational environment’ (including the managerial, social, structural, and physical environment, as well as communication between the inside and outside of the organization).” This capital is expected to gradually increase with further education, skills training and the gaining of experience by staff and managers. Also, the further development of intra-organizational structures and inter-relations with the market will empower the organization to adapt to continually changing circumstances, leading to competitive value and profit. Finally, a list of 101 proposed components was agreed upon in the evaluation of intellectual capital in rehabilitation organizations.Originality/valueThis paper may lead to the development of measurement tools and ultimately to planning effective programs to increase intellectual capital in rehabilitation organizations.
Fungal transformation of selenium and tellurium located in a volcanogenic sulfide deposit
Authors: Liang Xinjin , Perez Magali Aude Marie‐Jeanne , Zhang Shuai , Song Wenjuan , Armstrong Joseph Graham , Bullock Liam Adam , Feldmann Jörg , Parnell John , Csetenyi Laszlo , Gadd Geoffrey Michael 
Published: April 2020

SummaryMicrobial reduction of soluble selenium (Se) or tellurium (Te) species results in immobilization as elemental forms and this process has been employed in soil bioremediation. However, little is known of direct and indirect fungal interactions with Se‐/Te‐bearing ores. In this research, the ability of Phoma glomerata to effect transformation of selenite and tellurite was investigated including interaction with Se and Te present in sulfide ores from the Kisgruva Proterozoic volcanogenic deposit. Phoma glomerata could precipitate elemental Se and Te as nanoparticles, intracellularly and extracellularly, when grown with selenite or tellurite. The nanoparticles possessed various surface capping molecules, with formation being influenced by extracellular polymeric substances. The presence of sulfide ore also affected the production of exopolysaccharide and protein. Although differences were undetectable in gross Se and Te ore levels before and after fungal interaction using X‐ray fluorescence, laser ablation inductively coupled plasma mass spectrometry of polished flat ore surfaces revealed that P. glomerata could effect changes in Se/Te distribution and concentration indicating Se/Te enrichment in the biomass. These findings provide further understanding of fungal roles in metalloid transformations and are relevant to the geomicrobiology of environmental metalloid cycling as well as informing applied approaches for Se and Te immobilization, biorecovery or bioremediation.
Differential effects of antidepressant subgroups on risk of acute myocardial infarction: A nested case–control study
Authors: Alqdwah‐Fattouh Rasha , Rodríguez‐Martín Sara , de Abajo Francisco J. , González‐Bermejo Diana , Gil Miguel , García‐Lledó Alberto , Bolúmar Francisco 
Published: April 2020

AimsThe primary objective of this study was to investigate the association between antidepressants use and the risk of acute myocardial infarction (AMI).MethodsWe conducted a nested case–control study using a primary care database over the period 2002–2015. From a cohort of patients aged 40–99 years, we identified incident AMI cases and randomly selected 5 controls per case, matched to cases for exact age, sex and index date. Exposure to antidepressants were categorised as current, recent, past and nonusers. Adjusted odds ratio (AOR) and 95% confidence interval (CI) were computed using conditional logistic regression to assess the association between the current use of different antidepressants subgroups and AMI as compared to nonuse. Dose and duration effects were explored.ResultsTotals of 24 155 incident AMI cases and 120 775 controls were included. The current use of antidepressants as a group was associated with a reduced risk (AOR = 0.86; 95% CI: 0.81–0.91), but mainly driven by selective serotonin reuptake inhibitors (AOR = 0.86; 95% CI:0.81–0.93). A reduced risk was also observed with trazodone (AOR = 0.76;95% CI: 0.64–0.91), and clomipramine (AOR = 0.62; 95% CI: 0.40–0.96), whereas no significant effect was observed with other antidepressants. A duration‐dependent effect was suggested for selective serotonin reuptake inhibitors, trazodone and clomipramine, while there was no clear dose‐dependency.ConclusionThis study suggests that current use of antidepressants interfering selectively with the reuptake of serotonin, and those antagonizing the 5‐HT2A receptor, are associated with a decrease in AMI risk and should be the antidepressants of choice in patients at cardiovascular risk.
The nucleus accumbens and inhibition in the ventral tegmental area play a causal role in the Kamin blocking effect
Authors: Aggarwal Mayank , Akamine Yumiko , Liu Andrew W. , Wickens Jeffery R. 
Published: April 2020

AbstractThe discovery of Kamin blocking led to the idea that associative learning occurs only when there is a mismatch between actual and predicted outcomes, or prediction error. The neural substrates involved in regulating this prediction error during behavioral learning are still not fully elucidated. We investigated in rats the role of the ventral tegmental area and the nucleus accumbens in Kamin blocking. Our blocking paradigm involved three phases: appetitive classical conditioning of a lever cue, conditioning of a compound of the lever cue plus an auditory cue, and testing response to the auditory cue in extinction. We found that disruption of inhibition in the ventral tegmental area by bicuculline, or designer receptor mediated inactivation of the nucleus accumbens, during compound cue conditioning, attenuated Kamin blocking. These results suggest that inhibition in the ventral tegmental area and inhibitory output from the nucleus accumbens are necessary for blocking and make behaviorally significant contributions to the computation of reward prediction error. In addition, we found that inactivating the neurons in the nucleus accumbens during classical conditioning of the lever cue also attenuated blocking, without affecting classical conditioning of the lever. This indicates that learning in the nucleus accumbens is necessary for blocking and reward estimation. Our results reveal a causal role for nucleus accumbens modulated inhibitory inputs to the ventral tegmental area in the blocking effect and suggest that they contribute to computation of reward prediction error during associative learning.
Synthesis of Eu‐doped hydroxyapatite whiskers and fabrication of phosphor layer via electrophoretic deposition process
Authors: Zhang Chenning , Uchikoshi Tetsuo , Liu Lihong , Cai Gemei , Si Jiayong , Hirosaki Naoto 
Published: April 2020

ABSTRACTHighly biocompatible and efficiently luminescent whiskers of the hydroxyapatite (Ca10(PO4)6(OH)2, HAp) doped with various concentrations (0‐5 at.%) of europium were prepared by hydrothermal synthesis and the Eu‐doped Hap‐coating layers onto the surface of titanium substrate were fabricated by the electrophoretic deposition (EPD) process for fluorescent probe application. The maximum doping concentration of Eu accommodating into the host lattice of HAp was detected as ~1.5 at.% and all the hydrothermally synthesized Eu‐doped HAp whiskers were found to have high crystallinity and orientation growth along the c‐axis by X‐ray diffraction (XRD) identification. The valence of the doped Eu was identified as trivalent and divalent coexistence at a concentration percentage of Eu3+: Eu2+ = 78%: 22% by X‐ray photoelectron spectroscopy (XPS) spectra. The replacement site of the doped Eu ions in the crystal structure of HAp host was clarified by Rietveld refinement. The whisker morphology of the hydrothermally synthesized particle was demonstrated by field‐emission scanning electron microscopy (FE‐SEM) observation and their component elements were analyzed by energy dispersive X‐ray (EDX) mapping. The photoluminescence (PL) emissions of the Eu‐doped HAp whiskers and fabricated their coating layers were both revealed mainly at ~615 nm (5D0 → 7F2) and ~697 nm (5D0 → 7F4), which is a wavelength that easily transmitting through living system for biological imaging. The PL emission are falling in the region of reddish orange and belonging to color temperature below 1500 K. Decay time and internal and external quantum efficiencies (QEs) were also measured to reveal them depending on the doping concentration of Eu. The hydrothermally prepared Eu‐doped HAp whiskers would be aimed at biomedical application, due to their promising fluorescent function of probe for in vivo imaging in medical diagnose by utilizing the superior biocompatibility of the HAp host and highly efficient luminescent property of the Eu activator.
Education as an Instrument of Nation‐Building in Postcolonial Africa
Authors: Bereketeab Redie 
Published: April 2020

AbstractThe article examines the role of education in nation‐building in postcolonial Africa. The postcolonial African nationalist leaders faced formidable challenges in building new nations out of disparate ethnic, religious, cultural, and linguistic groups, particularly as regards the two intimately related processes of deconstruction and construction. While deconstruction entailed dismantling the structures, institutions, and power relations of the colonial period, construction entailed replacing them with relevant national institutions, structures, authorities, and mechanisms. Education was to advance the process of construction and transformation as a pedagogical instrument for cultivating a national identity by fostering integration and cohesion. One of the nationalist leaders’ biggest mistakes, however, was to adopt a homogenizing strategy of nation‐building. The paper subscribes to the conception of heterogeneity as a nation‐building strategy, where ethnic and civic (sub‐national and national) layers constitute the nation. The overall focus of the article is a conceptual and theoretical analysis of the nexus between education and nation‐building in postcolonial Africa. The central argument is that education plays a decisive role in nation‐building in Africa. Eritrea is selected as an empirical case study to advance this argument.
Exploring the roles of fecundity-related long non-coding RNAs and mRNAs in the adrenal glands of small-tailed Han Sheep
Authors: Xia Qing , Li Qiuling , Gan Shangquan , Guo Xiaofei , Zhang Xiaosheng , Zhang Jinlong , Chu Mingxing 
Published: April 2020

Abstract
Background
Long non-coding RNAs (lncRNAs) can play important roles in uterine and ovarian functions. However, little researches have been done on the role of lncRNAs in the adrenal gland of sheep. Herein, RNA sequencing was used to compare and analyze gene expressions in adrenal tissues between follicular phases and luteal phases in FecBBB (MM) and FecB++ (WW) sheep, respectively, and differentially expressed lncRNAs and genes associated with reproduction were identified.

Results
In MM sheep, 38 lncRNAs and 545 mRNAs were differentially expressed in the adrenal gland between the luteal and follicular phases; In WW sheep, 513 differentially expressed lncRNAs and 2481 mRNAs were identified. Gene Ontology and Kyoto Encyclopedia of Genes and Genomes enrichment analyses indicated that differentially expressed lncRNAs and their target genes are mainly involved in the circadian rhythm, the mitogen activated protein kinase, thyroid, ovarian steroidogenesis and transforming growth factor beta signaling pathways. Differentially expressed lncRNAs can regulate reproduction by modulating genes involved in these signaling pathways and biological processes. Specifically, XLOC_254761, XLOC_357966, 105,614,839 and XLOC_212877 targeting CREB1, PER3, SMAD1 and TGFBR2, respectively, appear to play key regulatory roles.

Conclusion
These results broaden our understanding of lncRNAs in adrenal gland of sheep and provide new insights into the molecular mechanisms underlying sheep reproduction.
Intravitreal Aflibercept injection with Panretinal photocoagulation versus early Vitrectomy for diabetic vitreous hemorrhage: randomized clinical trial
Authors: Abd Elhamid Ahmed Hosni , Mohamed Ahmed Abd El Alim , Khattab Abeer Mohamed 
Published: April 2020

AbstractBackgroundTo compare efficacy and safety of intravitreal aflibercept (IVA) injection with panretinal photocoagulation (PRP) versus early vitrectomy for diabetic vitreous hemorrhage (VH).MethodsProspective, randomized study that included 34 eyes with diabetic VH. They were divided into two groups, Group Ι (17 eyes) received three successive IVA injections followed by PRP and group ΙΙ (17 eyes) for whom early vitrectomy was done. Follow up was carried out after one, two, three, six and nine months. The primary outcome measure was change in the mean best corrected visual acuity (BCVA) after nine months, secondary outcome measures were mean duration of clearance of VH and rate of recurrent hemorrhage with any additional treatment in both groups. Complications were reported.ResultsThere was no statistically significant difference regarding initial demographic criteria between both groups. The mean final log MAR BCVA was statistically better than the initial BCVA in both groups (0.51 ± 0.20, 1.17 ± 0.48 for group I and 0.48 ± 0.18, 1.44 ± 0.44 for group II,P < 0.001). There was no statistically significant difference between both groups regarding the mean final Log Mar BCVA (0.51 ± 0.20 for group I, 0.48 ± 0.18 for group II,p ≥ 0.05), the mean duration of clearance of VH was 7.8 ± 1.8 weeks, 5 days for group I and II respectively. PRP was completely done for all eyes in group I after three months. The difference in the recurrence rate between group I (29.4%) and group II (11.8%) was statistically significant (p < 0.05). Vitrectomy was done for three eyes (17.6%) due to recurrent non-resolving VH in group I. late recurrent VH occurred in two eyes (11.8%) in group II, IVA was given with complete clearance of the hemorrhage. No vision threatening complications were reported in both groups.ConclusionBoth intravitreal injection of aflibercept followed by PRP and early vitrectomy are effective and safe modalities for treatment of diabetic vitreous hemorrhage. Early vitrectomy leads to faster vision gain with less incidence of recurrence than intravitreal injection.Trial registrationRandomized clinical trial under the number ofNCT04153253on November 6, 2019 “Retrospectively registered”.
Non-paraneoplastic autoimmune retinopathy that developed in fellow eye 10 years after onset in first eye: a case report
Authors: Miura Gen , Baba Takayuki , Iwase Takehito , Ohde Hisao , Kanda Atsuhiro , Saito Wataru , Ishida Susumu , Yamamoto Shuichi 
Published: April 2020

Abstract
Background
Evidence-based criteria for the treatment of autoimmune retinopathy (AIR) have not been established. The pathology and clinical features of each antibody causing AIR, and its long-term course are still undetermined. We report our findings in a case of non-paraneoplastic AIR (npAIR) that developed in the fellow eye 10 years after the onset in the first eye.

Case presentation
Our patient had photophobia in both eyes and a rapidly progressing visual field defect in his right eye at the initial examination. He was diagnosed with non-paraneoplastic AIR based on the clinical findings and immunoblot analyses for anti-retinal antibodies, and he was treated with steroids. Ten years later, a visual field defect developed in the fellow eye, and a diagnosis of npAIR was made. Immunoblot analyses were positive for anti-α-enolase antibodies. He was treated with steroids, immunosuppressants, and plasma exchange. However, the response to the treatment was poor and both eyes eventually became blind.

Conclusions
As best we know, this is the first case report of npAIR that developed in the fellow eye over 10 years after the development in the first eye. Long-term follow-up and a search for tumor lesions are necessary in cases of npAIR. Further understanding of the long-term course of AIR can contribute to an understanding of the pathology and treatment of npAIR.
In situ split plus portal vein ligation (ISLT) – a salvage procedure following inefficient portal vein embolization to gain adequate future liver remnant volume prior to extended liver resection
Authors: Lehwald-Tywuschik Nadja , Vaghiri Sascha , Schulte am Esch Jan , Alaghmand Salman , Klosterkemper Yan , Schimmöller Lars , Lachenmayer Anja , Ashmawy Hany , Krieg Andreas , Topp Stefan A. , Rehders Alexander , Knoefel Wolfram Trudo 
Published: April 2020

Abstract
Background
Right extended liver resection is frequently required to achieve tumor-free margins. Portal venous embolization (PVE) of the prospective resected hepatic segments for conditioning segments II/III does not always induce adequate hypertrophy in segments II and III (future liver remnant volume (FLRV)) for extended right-resection. Here, we present the technique of in situ split dissection along segments II/III plus portal disruption to segments IV-VIII (ISLT) as a salvage procedure to overcome inadequate gain of FLRV after PVE.

Methods
In eight patients, FLRV was further pre-conditioned following failed PVE prior to hepatectomy (ISLT-group). We compared FLRV changes in the ISLT group with patients receiving extended right hepatectomy following sufficient PVE (PVEres-group). Survival of the ISLT-group was compared to PVEres patients and PVE patients with insufficient FLRV gain or tumor progress who did not receive further surgery (PVEnores-group).

Results
Patient characteristics and surgical outcome were comparable in both groups. The mean FLRV-to-body-weight ratio in the ISLT group was smaller than in the PVEres-group pre- and post-PVE. One intraoperative mortality due to a coronary infarction was observed for an ISLT patient. ISLT was successfully completed in the remaining seven ISLT patients. Liver function and 2-year survival of ~ 50% was comparable to patients with extended right hepatectomy after efficient PVE. Patients who received a PVE but who were not subsequently resected (PVEnores) demonstrated no survival beyond 4 months.

Conclusion
Despite extended embolization of segments I and IV-VIII, ISLT should be considered if hypertrophy was not adequate. Liver function and overall survival after ISLT was comparable to patients with trisectionectomy after efficient PVE.