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Incidents of nuclear and radiological smuggling in the Indian Ocean are a matter of concern. Attempts to smuggle nuclear material within India have also been reported as recently as 2021. Indian security agencies previously have also seized natural uranium in coastal states such as Gujarat, Maharashtra and Bengal indicating how vulnerable the Indian coast is to radiological and nuclear smuggling. The Nuclear Security Index has also consistently ranked India below China and Pakistan despite their poor record on nuclear non-proliferation. These facts highlight concerns regarding the possible misuse of nuclear and radiological material by criminal and terrorist networks. Since India is targeted by terrorist groups and lies in the vicinity of countries and routes that see frequent nuclear and radiological trafficking, there are inevitable implications for the Indian coastal security system. This article identifies and analyses these security implications and argues for a beefing up of India's coastal security. [ABSTRACT FROM AUTHOR]

This article assesses mainstream sociolinguistic theory and methods in the context of world Englishes. Despite its obvious applicability, sociolinguistic theory has not always been the primary analytic model for world Englishes. The multilingual and sometimes mobile circumstances of world Englishes contexts do not always fit the usual definition of a Labovian speech community. This article extends classic sociolinguistic theory and method to studies of Outer Circle English situations to test their validity and scope. Predictions for class, gender, age, peer effects and identity are assessed, all initially developed in monolingual urban Western contexts. Methodological constructs such as apparent time, the sociolinguistics interview and social network metrics are also critically evaluated. The discussion shows that, although these new contexts challenge claims of universality, they often also uphold the original insights. A falsifiable theory of sociolinguistic variation and associated methods remain crucial for a principled understanding of variation and change in world Englishes. [ABSTRACT FROM AUTHOR]

Amoebic liver abscess (ALA) is commonly seen in tropical countries and diagnosis of ALA relies mainly on non-specific serological and imaging techniques as well as PCR from pus. This study evaluated the potential of using cell free DNA (cfDNA) from serum and urine for diagnosing ALA. We prospectively evaluated quantitative PCR (qPCR) for detection of cf DNA in serum and urine sample in all liver abscess patients. The samples were collected from patients reporting to emergency ward of Postgraduate Institute of Medical Education and Research, Chandigarh, India with symptoms suggestive of liver abscess. Real time PCR was done to detect cf DNA in serum and urine by targeting 99-bp unit of small subunit rRNA of Entamoeba histolytica and conventional PCR for pus. A total 113 samples (serum and urine) and 100 pus samples were analysed. A total of 62 ALA patients were confirmed; with maximum 57 patients detected by qPCR for cfDNA in the serum, 55 patients by PCR on pus aspirate and 50 ALA patients by qPCR for cfDNA in urine sample. Therefore, the sensitivity of qPCR for detection of cf DNA in serum was 91.94% and for urine was 80.65%. A total of 11.2% of ALA patients were diagnosed only through detection of E. histolytica cf DNA in their serum and urine. Detection of cfDNA from serum, urine of ALA has a potential role in future especially for developing countries as it is a rapid, sensitive and patient friendly diagnostic approach. [ABSTRACT FROM AUTHOR]

The default use of masculine morphology to refer to all genders in Arabic-speaking countries is largely unquestioned and widely accepted. However, research on masculine generic morphology in other gender-marked languages has shown that this can create an over-representation of men and a male-bias in perception. Given the extensive use of default masculine grammatical gender in the context of job recruitment, education, and formal communication where women are typically underrepresented and men overrepresented, this widely accepted notion needs to be investigated. The primary aim of this research is to understand how grammatical gender in Arabic mediates occupational expectations based on the language currently used in job recruitment in Arabic speaking countries. Specifically, the study explores how the use of default masculine grammatical gender can create a male-bias in perception. The secondary aim of this research is to test whether gender-inclusive language can reduce this male-bias in perception and instead increase the accessibility, activation, and retrieval of exemplars related to other gender minorities (i.e., reduce male-bias in perception). This is achieved through a novel prompted speech production experiment, based on an adaptation of the popular board game 'Taboo' where participants are asked to describe role nouns presented (e.g., doctor or nurse) in different language conditions. [ABSTRACT FROM AUTHOR]

Stable nonnative varieties of English acquired and used in the absence of native English input can diverge systematically from native varieties over time (Cheshire, 1991; Kachru, 1983; Platt, Weber, & Ho, 1984). Focusing on Indian English article use, this study asks the following question: If divergence is indeed occurring, do new features derive primarily from first language (L1) transfer or from universal principles? Natural conversational speech is assessed in relation to four hypotheses relating to L1 transfer and language universals, and a multivariate regression analysis evaluates the relative strength of each factor. The new article system is not found to be identical to the L1 article system. Although L1 transfer appears to be operative when an overt form (the specific indefinite article) exists in the L1, when a gap occurs in the L1 (no definite article), speakers do not completely omit the definite article in their second language English. Using Prince's (1981) taxonomy of assumed familiarity, it is shown that the absence of a L1 model for definite articles permits the intervention of universally available discourse knowledge, such that speakers apply an economical, disambiguating principle to the use of overt articles, reserving them mainly for new (less given or inferable) information and omitting them in more redundant contexts.

Cellular therapy has shown promise as a strategy for the functional restoration of ischemic tissues through promoting vasculogenesis. Therapy with endothelial progenitor cells (EPCs) has shown encouraging results in preclinical studies, but the limited engraftment, inefficient migration, and poor survival of patrolling endothelial progenitor cells at the injured site hinder its clinical utilization. These limitations can, to some extent, be overcome by co-culturing EPCs with mesenchymal stem cells (MSCs). Studies on the improvement in functional capacity of late EPCs, also referred to as endothelial colony-forming cells (ECFCs), when cultured with MSCs have mostly focused on the angiogenic potential, although migration, adhesion, and proliferation potential also determine effective physiological vasculogenesis. Alteration in angiogenic proteins with co-culturing has also not been studied. We co-cultured ECFCs with MSCs via both direct and indirect means, and studied the impact of the resultant contact-mediated and paracrine-mediated impact of MSCs over ECFCs, respectively, on the functional aspects and the angiogenic protein signature of ECFCs. Both directly and indirectly primed ECFCs significantly restored the adhesion and vasculogenic potential of impaired ECFCs, whereas indirectly primed ECFCs showed better proliferation and migratory potential than directly primed ECFCs. Additionally, indirectly primed ECFCs, in their angiogenesis proteomic signature, showed alleviated inflammation, along with the balanced expression of various growth factors and regulators of angiogenesis. [ABSTRACT FROM AUTHOR]

Examines a case of dialectal variation in a subpart of the tense-modality aspect system of Indian English. Focuses on functions associated with an existing form: the use of the pluperfect "had" + V-"ed" construction. Contrasts this usage with that of British and American English. (Author/VWL)

This study presents the first sociolinguistic examination of communication in a social dilemma. 90 participants (18 groups of 5) completed a modified public goods game with 2 rounds: an effort-based task and an unscripted online chat about the results. A linear regression shows that consensus-building language in the Round 1 chat affects cooperative behaviour in the Round 2 task. A qualitative analysis of 3 groups explores how participants use different recognisable styles of communication (registers) to strategically align with or disalign from one another (stancetaking). Each analysis is complemented with a quantitative visualisation of how (dis)alignment between participants unfolds in real-time. We found that successful groups employ registers associated with collective action, such as gameshow talk ('ouch. £69 out of a possible £120') to encourage, punish, and pledge allegiance to one another. Less successful groups use registers that risk evoking mistrust and reducing obligation, such as business talk ('I approve'). We argue that a mixed methods approach to interaction and behaviour can reveal incremental shifts in consensus building that underpin quantitative outcomes. [ABSTRACT FROM AUTHOR]

Do accent biases observed half a century ago (Giles 1970) and 15 years ago (Coupland and Bishop 2007) still hold in Britain today? We provide an updated picture of national attitudes to accent labels by replicating and extending previous studies. Mean ratings and relative rankings of 38 accents for prestige and pleasantness by a large representative sample of the British population (N = 821) attest to a remarkably stable, long-standing hierarchy of accent status. We find little evidence of demotion of conservative prestige varieties or reranking of accents, although we do observe a slight improvement in lower rankings. We focus in detail on age and life stage, finding that most of the age patterns observed in earlier studies were in fact instances of age-grading (lifespan effects), not real-time change in attitude. The midlife phase of life corresponds to conservative shifts in the perception of global, migrant-heritage, and stigmatised varieties. Our findings add change in speech evaluation to the growing body of research on lifespan change in speech production. Finally, although effects of ethnicity, social class, regional self- and other-bias, and age remain firmly in place, earlier gender differences in respondent behaviour have more or less disappeared. [ABSTRACT FROM AUTHOR]

Dental anxiety and pain in pediatric patients are one of the major reasons leading to untreated dental caries and dental negligence. This study is a systematic review to check the efficacy of aromatherapy using essential oils to help pediatric patients (6-12 years of age) overcome dental anxiety and pain before, during, and after any dental procedure The study designs included were randomized control trial, cross sectional, in vivo studies explaining the effectiveness of aromatherapy for dental anxiety and pain in pediatric children in the age group of 6-12 years. The studies and manuscripts published between January 2013 and April 2023 on PubMed, Google Scholar, and Cochrane Library published in English were considered. The evaluation of effectiveness by using any faces pain scales or checking salivary cortisol or by checking vitals. A systematic review of literature and meta-analysis was performed. This study followed the Preferred Reporting Items for Systematic Review 2020, the Cochrane Handbook for systematic reviews of interventions, version 5.1.0. The conclusions of all studies indicated that aromatherapy is an effective alternative therapy that can be practiced in dentistry for anxious pediatric dental patients as it reduces anxiety. [ABSTRACT FROM AUTHOR]

Unequal outcomes in professional hiring for individuals from less privileged backgrounds have been widely reported in England. Although accent is one of the most salient signals of such a background, its role in unequal professional outcomes remains underexamined. This paper reports on a large-scale study of contemporary attitudes to accents in England. A large representative sample (N = 848) of the population in England judged the interview performance and perceived hirability of "candidates" for a trainee solicitor position at a corporate law firm. Candidates were native speakers of one of five English accents stratified by region, ethnicity, and class. The results suggest persistent patterns of bias against certain accents in England, particularly Southern working-class varieties, though moderated by factors such as listener age, content of speech, and listeners' psychological predispositions. We discuss the role that the observed bias may play in perpetuating social inequality in England and encourage further research on the relationship between accent and social mobility. [ABSTRACT FROM AUTHOR]

The identity of the surface intermediates involved in chain growth during Fischer–Tropsch synthesis remains a topic of ongoing debate. In the present work we use a combination of temperature programmed reaction spectroscopy and high resolution X-ray photoemission spectroscopy to study the reactivity of C3Hx adsorbates on a Co(0001) single crystal surface in order to explore the stabilities of the different C3Hx surface intermediates and to study elementary reaction steps relevant to chain growth and chain termination. Propene (H3C–CH=CH2) and propyl (H3C–CH2–CH2–) adsorbates react below 200 K already, either by desorption of propene or by dehydrogenation to adsorbed propyne (H3C–C≡CH). Co-adsorbed Had and COad do not affect the temperature at which propyl and propene react, but they do suppress the dehydrogenation pathway in favour of propene desorption. Their high reactivity under simulated FTS conditions disqualifies them as feasible intermediates for FTS, which requires long-lived intermediates to match the low monomer formation rate. Propyne, the most stable C3Hx adsorbate in the absence of COad, is hydrogenated to propylidyne (H3C–CH2–C≡) > 230 K when both COad and Had are present. Propylidyne dimerization occurs around 313 K and produces a 3-hexyne (H5C2–C≡C–C2H5) surface intermediate which is hydrogenated to 3-hexene (H5C2–CH=CH–C2H5) above 350 K. These findings are of direct relevance to FTS: they show that the high coverage of COad and Had present during the reaction influence the reactivity of CxHy adsorbates involved in chain growth and ultimately steer product selectivity. The findings provide further experimental support for the previously proposed alkylidyne chain growth mechanism on close-packed cobalt terraces: CO stabilizes CxHy growth intermediates in the alkylidyne form and growth proceeds via coupling of a long chain alkylidyne and methylidyne (CH). [ABSTRACT FROM AUTHOR]

Fair access to employment is vital for improving social mobility in Britain today. As language is not explicitly protected by the Equality Act 2010, accent can become a proxy for other forms of discrimination at key junctures for social mobility such as recruiting to elite professions. The Accent Bias in Britain project (www.accentbiasbritain.org) aims to assess prevailing attitudes to accents in Britain and to assess the extent to which accent-based prejudice affects elite professions. In this article, we focus specifically on methodological innovations of this project, rather than detailed results. We describe our approach to four challenges in the study of accent bias: how to assess whether accent preferences actively interfere with the perception of expertise in candidates' utterances; how to more precisely identify sources of bias in individuals; new technologies for real-time rating to establish whether specific 'shibboleths' trigger shifts in evaluation; and how to assess the efficacy of interventions for combating implicit bias. We suggest integrating best practices from the fields of linguistics, social psychology and management studies to develop sound interdisciplinary methods for the study of language, discrimination and social mobility. [ABSTRACT FROM AUTHOR]

Social constructivist approaches to style have moved away from the cognitive asymmetry that underpinned Labov's original attention-to-speech model, namely that a first-learned vernacular often has cognitive primacy. This study explores the interplay of cognitive and interactional effects in style variation. It reports on three related dynamics of style variation in one individual--Fareed Zakaria, an Indian-American media personality. First,we see Zakaria's robust English bidialectalism with American and Indian audiences. This strong audience effect is complicated by the second finding, which points to asymmetric style dominance in Zakaria's first-learned Indian style, which he subtly defaults to regardless of audience when his attention is diverted by such tasks as quickly counter-arguing or inserting parenthetical information. The third part of the study relates style dominance to agency: In a reflexive intra-personal process of biographical indexicality, speakers such as Zakaria may exploit their personal style biography and use their dominant variety to perform no-nonsense 'real me' stances in interaction. (Audience, attention, style variation, indexicality, repertoire, processing, bidialectalism, second dialect acquisition, speech rate) [ABSTRACT FROM AUTHOR]

The role of social networks in language variation has been studied using a wide range of metrics. This study critically examines the effect of different dimensions of networks on different aspects of language variation. Three dimensions of personal network (ethnicity, nationality, diversity) are evaluated in relation to three levels of language structure (phonetic form, accent range, language choice) over three generations of British Asians. The results indicate a scaling of network influences. The two metrics relating to qualities of an individual's ties are more historically and culturally specific, whereas the network metric that relates to the structure of an individual's social world appears to exert a more general effect on accent repertoires across generations. This two-tier typology--network qualities (more culturally contingent) and network structures (more general)--facilitates an integrated understanding of previous studies and a more structured methodology for studying the effect of social networks on language. [ABSTRACT FROM AUTHOR]

This theme issue marks fifty years since the publication of William Labov's Social Stratification of English in New York City, the foundation study of variationist sociolinguistics. This Introduction offers the editors' rationale for the shape of the issue. We briefly survey the innovations and impact of the New York study, together with the subsequent development of the field by Labov and others. We then touch on several strands of Labov's contribution to sociolinguistics: language change, linguistic evaluation, methodological innovation, African American English, language and the individual, and language style. We conclude with a reflection on Labov's commitment to the study of language in society. [ABSTRACT FROM AUTHOR]

An introduction is presented to an article published in the issue of the journal by Lorenza Mondada on multimodal and embodied processes in conversational interaction.

A long-standing challenge in quantitative sociolinguistic analysis is identifying fine speaker meanings in interaction while retaining the ability to draw wider group comparisons. To bridge these goals, we propose a methodology for quantitative discourse analysis. In data from the Punjabi community in London, we initially find comparable group rates of use of an ethnolinguistic variable by older and younger British Asian (second-generation) men. We develop a new metric to assess whether these groups are in fact indexing similar ethnic and class meanings. Our measure of lectal focusing in interaction (LFI) tracks how much an individual shifts toward one or another style during a single interaction, focusing on Standard British English, Vernacular London English, and Indian English. Older British Asian men exhibit a high degree of LFI, shifting dramatically at times to achieve subtly strategic, interactionally tuned ends. Younger British Asian men show lower rates of LFI, particularly in their use of ethnic variants. Despite the continued use of similar forms, the LFI analysis identifies changes in indexical potential and a shift from marker toward indicator-like usage. We account for this through major changes in the social practices and political climate over recent decades in the community. The LFI measure thus brings interactional analysis to bear on the causes and rates of language change. [ABSTRACT FROM PUBLISHER]

This study examines the retention of a non-native dialect feature by British Asians in London. We examine the use of one Punjabi feature (t-retroflexion) and one British feature (t-glottaling) across three groups: first-generation non-native immigrants and two age groups of second-generation British Asians. Cognitively oriented models predict that non-native features will either be innately blocked (Chambers, 2002) or reallocated by native generations. A socially oriented model allows for more gradual change. Contrary to the cognitive view, the older second generation neither blocks nor clearly reallocates use of t-retroflexion; they closely mirror the first generation's non-native use. However, they simultaneously control nativelike t-glottaling, reflecting a robust bidialectal ability. It is the younger second generation who exhibit focused reallocation in the form and function of t-retroflexion. This 20-year lag corresponds to major changes in demographics and race relations in the community over 5 decades. The study shows that acquisition of the local dialect and retention of exogenous features should be seen as independently constrained rather than as mutually exclusive. [ABSTRACT FROM PUBLISHER]

This study has two goals: empirically, it accounts for variation found in the use of ethnically-marked variants among British-born Asians; methodologically, it assesses the variationist approach against a repertoire approach. In Part I, analysis of one Punjabi-derived phonetic trait, examined in interview data only, suggests that younger women shift to exclusive use of the British prestige variant. Part II expands the analysis to four variables and to broader speech repertoires for four individuals. The repertoire analysis shows the conclusions in Part I to be inaccurate, and instead reveals: (1) retention of Punjabi traits by young women in the home domain; (2) two types of repertoire - flexible and fused; (3) a gendered reversal in repertoire type over time; and (4) a network diversity basis for these differences. Unlike the initial variationist analysis, the use of repertoire analysis and a new Network Diversity Index leads to the discovery of a shift among lower-middle-class British Asians from traditional Punjabi to urban British social structures. [ABSTRACT FROM AUTHOR]

The article offers a list of tips and advice to authors interested in submitting articles for publication in the journal on topics such as the need for a focus on sociolinguistics, readership, and the use of references.

This study confirms the robustness of the finding in the literature on African American Vernacular English (AAVE) and creole English (especially in the Caribbean) that omission of copular and auxiliary be varies systematically according to predicate type. Verbal predicates are associated with the highest rates of copula absence and following NPs with the lowest rates; following adjectives or locatives show intermediate rates (see Rickford 1998:190). Although this pattern is highly consistent, convincing explanations for it remain elusive. A recurrent suggestion (McWhorter 2000; Winford 1998, 2004; Wolfram 2000) is that the AAVE and creole English pattern is inherited independently from general processes of imperfect second language learning (simplification, generalization) that operated as the African ancestors of today’s speakers acquired English. In this paper, we pursue this possibility, but discover that the grammatical conditioning of copula absence in AAVE and creole varieties is distinct from the patterns found in second language learning data. We examine four sets of data on English acquired as a second language (Indian English, South African Indian English, Singaporean English, Spanish English) and show, using two statistical measures, that conditioning of copula absence in the second language data does not resemble the AAVE and creole pattern. (One possible exception is the high rates of omitted be with verbal predicates, for which we explore possible explanations.) We show further that typological diversity in copula systems also militates against a universal markedness-based pattern. The findings reduce the possibility that the overall AAVE/creole pattern derives from a general tendency in second language acquisition and increase the possibility that the pattern reflects a shared substrate influence from West African languages or other historical contact factors. [ABSTRACT FROM AUTHOR]

Recent research has aimed to integrate the investigation of vernacular universals in native English dialects with variation in postcolonial varieties of English and cross-linguistic typology (Chambers 2004; Kortmann 2004). This article assumes that any search for universals in bilingual varieties must include an assessment of the grammatical conditioning of features and a comparison with the relevant substrates. Comparing Indian English and Singapore English, I examine three proposed candidates for English universals (Kortmann and Szmrecsanyi 2004), all of which show some presence in the two varieties — past tense omission, over-extension of the progressive, and copula omission. Past tense omission is found to be genuinely similar in the two varieties and accounted for by typological parallels in the substrates, whereas progressive morphology use and copula omission are found to be divergent in the two varieties and accounted for by typological differences in the substrates. All three variable systems are explicable as substrate-superstrate interactions, tempering claims of universality in both distribution and explanation. [ABSTRACT FROM AUTHOR]

While New Indo-Aryan languages are a common example of morphological ergativity, the range of variation in ergative marking and agreement among these languages has not been examined in detail. The goals of this article are twofold. We first present a typology of ergative marking and agreement in Indo-Aryan languages, demonstrating that a progressive loss of ergative marking has occurred to varying degrees in different systems. This process is manifested in two distinct strategies of markedness reduction: loss of overt subject marking in the nominal domain and loss of marked agreement in the verbal domain. Using the framework of Optimality Theory, we account for the typology in terms of universal subhierarchies of markedness. Extending the analysis to dialect variation in one language, Marathi, we show that the dialect typology parallels the crosslinguistic typology, but only within the range permitted by changes already present in the parent language (Old Marathi). Furthermore, the dialect typology includes additional hybrid case-agreement systems predicted by our analysis. [ABSTRACT FROM AUTHOR]

Research on indigenized non-native varieties of English has aimed to distinguish these varieties from individual second language learning in structural and social terms(;;) ; however, quantitative evidence of this divergence remains scarce. Through an analysis of a range of Indian English speakers in a contact situation in the United States, this study distinguishes developing dialect features from second language learning features and explores the concomitant emergence of dialect consciousness. First, an implicational analysis shows that some non-standard variables(past marking, copula use, agreement) exhibit a second language learning cline while others(articles) form a more stable, incipient non-standard system shared to some extent by all speakers; a multivariate analysis suggests that both sets of variables are governed by proficiency levels. Next, the explanatory scope of proficiency is assessed by examining the use of selected phonological variants(rhoticity, l-velarization, aspiration). The use of these features resembles native-like style-shifting, as it appears to be more sensitive to speakers’ attitudinal stances than to proficiency levels. This points to the importance of understanding emerging speaker awareness and perceptions of stigma, risk, and value in new varieties of English. [ABSTRACT FROM AUTHOR]

Muysken's article is a timely call for us to seek deeper regularities in the bewildering diversity of language contact outcomes. His model provocatively suggests that most such outcomes can be subsumed under four speaker optimization strategies. I consider two aspects of the proposal here: the formalization in Optimality Theory (OT) and the reduction of contact outcomes to four basic strategies. [ABSTRACT FROM PUBLISHER]

[Display omitted] • Hydrogen dissociation is slightly activated on close-packed cobalt surface. • Step sites offer a barrierless pathway for H 2 dissociation. • Hydrogen adsorbs strongest on close-packed terraces and more weakly on more open surfaces. • Hydrogen adsorption on HCP cobalt particles is generally weaker than on FCC-cobalt particles. The interaction of hydrogen with cobalt surfaces is of fundamental interest for Fischer-Tropsch synthesis. In the present work, the adsorption and desorption of hydrogen was studied on various cobalt single crystal surfaces that together represent the surface structures exposed by FCC and HCP cobalt nanoparticles used in applied catalysis. Dissociative hydrogen adsorption is activated on flat Co(0001), especially for hydrogen coverages beyond 0.5 ML. A tungsten filament creates hydrogen atoms and hot hydrogen molecules that increase the dissociative sticking probability and make it possible to obtain hydrogen coverages above 0.5 ML. Hydrogen in excess of 0.5 ML binds more weakly and desorbs in a separate low temperature desorption peak, in line with theoretical predictions. A third desorption peak appears above 1 ML and is attributed to subsurface hydrogen, the formation of which is attributed to hydrogen atoms produced by the tungsten filament. Adsorbed hydrogen atoms form (islands) of an ordered (2 × 2)-2H honeycomb structure for coverages between 0.3 and 0.8 ML which points to a specific stability of this structure. Step and kink sites on vicinal close-packed surfaces provide a low energy path for both hydrogen adsorption and desorption which results in a much higher dissociative sticking probability and a lower desorption temperature. The hydrogen adsorption strength on various FCC and HCP cobalt surfaces varies between 30 and 45 kJ/mol H ad and is strongest on threefold hollow sites on the close-packed terraces while it is significantly lower on fourfold hollow sites on FCC-(100) and on threefold hollow sites on various open HCP surfaces. Under reaction conditions, the structure-dependent adsorption energy translates to a two to three orders of magnitude variation of the equilibrium constant for hydrogen. [ABSTRACT FROM AUTHOR]

An introduction is presented in which the editor reports that Joseph Park is succeeding Lionel Wee as associate editor of the journal, commenting that Wee is retiring after six years at the journal, and comments that the journal's impact factor increased to 1.729.

The authors reflect on the former "Journal of Sociolinguistics" associate editor Monica Heller. They mention some of Heller's contributions to the journal such as bilingual abstracts, approaches on multilingualism and comments on manuscripts. They state that Heller was elected as president of the American Anthropological Association.

Decline in hematopoietic stem cell (HSC) function with age underlies limited health span of our blood and immune systems. In order to preserve health into older age, it is necessary to understand the nature and timing of initiating events that cause HSC aging. By performing a cross-sectional study in mice, we discover that hallmarks of aging in HSCs and hematopoiesis begin to accumulate by middle age and that the bone marrow (BM) microenvironment at middle age induces and is indispensable for hematopoietic aging. Using unbiased approaches, we find that decreased levels of the longevity-associated molecule IGF1 in the local middle-aged BM microenvironment are a factor causing HSC aging. Direct stimulation of middle-aged HSCs with IGF1 rescues molecular and functional hallmarks of aging, including restored mitochondrial activity. Thus, although decline in IGF1 supports longevity, our work indicates that this also compromises HSC function and limits hematopoietic health span., Competing Interests: Declaration of interests J.J.T. holds a sponsored research project with H3 Biomedicine., (Copyright © 2021 Elsevier Inc. All rights reserved.)