bluuebunny/crossref_metadata_2025 huggingface dataset:
The effect of mission duration on LISA science objectives
Authors: Amaro Seoane Pau , Arca Sedda Manuel , Babak Stanislav , Berry Christopher P. L. , Berti Emanuele , Bertone Gianfranco , Blas Diego , Bogdanović Tamara , Bonetti Matteo , Breivik Katelyn , Brito Richard , Caldwell Robert , Capelo Pedro R. , Caprini Chiara , Cardoso Vitor , Carson Zack , Chen Hsin-Yu , Chua Alvin J. K. , Dvorkin Irina , Haiman Zoltan , Heisenberg Lavinia , Isi Maximiliano , Karnesis Nikolaos , Kavanagh Bradley J. , Littenberg Tyson B. , Mangiagli Alberto , Marcoccia Paolo , Maselli Andrea , Nardini Germano , Pani Paolo , Peloso Marco , Pieroni Mauro , Ricciardone Angelo , Sesana Alberto , Tamanini Nicola , Toubiana Alexandre , Valiante Rosa , Vretinaris Stamatis , Weir David J. , Yagi Kent , Zimmerman Aaron
Published: December 2021

The science objectives of the LISA mission have been defined under the implicit assumption of a 4-years continuous data stream. Based on the performance of LISA Pathfinder, it is now expected that LISA will have a duty cycle of $$\approx 0.75$$

≈
0.75

, which would reduce the effective span of usable data to 3 years. This paper reports the results of a study by the LISA Science Group, which was charged with assessing the additional science return of increasing the mission lifetime. We explore various observational scenarios to assess the impact of mission duration on the main science objectives of the mission. We find that the science investigations most affected by mission duration concern the search for seed black holes at cosmic dawn, as well as the study of stellar-origin black holes and of their formation channels via multi-band and multi-messenger observations. We conclude that an extension to 6 years of mission operations is recommended.
Application of region-based video surveillance in smart cities using deep learning
Authors: Zahra Asma , Ghafoor Mubeen , Munir Kamran , Ullah Ata , Ul Abideen Zain
Published: December 2021

Smart video surveillance helps to build more robust smart city environment. The varied angle cameras act as smart sensors and collect visual data from smart city environment and transmit it for further visual analysis. The transmitted visual data is required to be in high quality for efficient analysis which is a challenging task while transmitting videos on low capacity bandwidth communication channels. In latest smart surveillance cameras, high quality of video transmission is maintained through various video encoding techniques such as high efficiency video coding. However, these video coding techniques still provide limited capabilities and the demand of high-quality based encoding for salient regions such as pedestrians, vehicles, cyclist/motorcyclist and road in video surveillance systems is still not met. This work is a contribution towards building an efficient salient region-based surveillance framework for smart cities. The proposed framework integrates a deep learning-based video surveillance technique that extracts salient regions from a video frame without information loss, and then encodes it in reduced size. We have applied this approach in diverse case studies environments of smart city to test the applicability of the framework. The successful result in terms of bitrate 56.92%, peak signal to noise ratio 5.35 bd and SR based segmentation accuracy of 92% and 96% for two different benchmark datasets is the outcome of proposed work. Consequently, the generation of less computational region-based video data makes it adaptable to improve surveillance solution in Smart Cities.
Fcγ Receptor-Dependent Internalization and Off-Target Cytotoxicity of Antibody-Drug Conjugate Aggregates
Authors: Aoyama Michihiko , Tada Minoru , Yokoo Hidetomo , Demizu Yosuke , Ishii-Watabe Akiko
Published: December 2021

Purpose

Antibody-drug conjugates (ADCs), which are monoclonal antibodies (mAbs) conjugated with highly toxic payloads, achieve high tumor killing efficacy due to the specific delivery of payloads in accordance with mAbs’ function. On the other hand, the conjugation of payloads often increases the hydrophobicity of mAbs, resulting in reduced stability and increased aggregation. It is considered that mAb aggregates have potential risk for activating Fcγ receptors (FcγRs) on immune cells, and are internalized into cells via FcγRs. Based on the mechanism of action of ADCs, the internalization of ADCs into target-negative cells may cause the off-target toxicity. However, the impacts of aggregation on the safety of ADCs including off-target cytotoxicity have been unclear. In this study, we investigated the cytotoxicity of ADC aggregates in target-negative cells.

Methods

The ADC aggregates were generated by stirring stress or thermal stress. The off-target cytotoxicity of ADC aggregates was evaluated in several target-negative cell lines, and FcγR-activation properties of ADC aggregates were characterized using a reporter cell assay.

Results

Aggregation of ADCs enhanced the off-target cytotoxicity in several target-negative cell lines compared with non-stressed ADCs. Notably, ADC aggregates with FcγR-activation properties showed dramatically enhanced cytotoxicity in FcγR-expressing cells. The FcγR-mediated off-target cytotoxicity of ADC aggregates was reduced by using a FcγR-blocking antibody or Fc-engineering for silencing Fc-mediated effector functions.

Conclusions

These results indicated that FcγRs play an important role for internalization of ADC aggregates into non-target cells, and the aggregation of ADCs increases the potential risk for off-target toxicity.
Implementation of the PointPillars Network for 3D Object Detection in Reprogrammable Heterogeneous Devices Using FINN
Authors: Stanisz Joanna , Lis Konrad , Gorgon Marek
Published: December 2021

In this paper, we present a hardware-software implementation of a deep neural network for object detection based on a point cloud obtained by a LiDAR sensor. The PointPillars network was used in the research, as it is a reasonable compromise between detection accuracy and calculation complexity. The Brevitas / PyTorch tools were used for network quantisation (described in our previous paper) and the FINN tool for hardware implementation in the reprogrammable Zynq UltraScale+ MPSoC device. The obtained results show that quite a significant computation precision limitation along with a few network architecture simplifications allows the solution to be implemented on a heterogeneous embedded platform with maximum 19% AP loss in 3D, maximum 8% AP loss in BEV and execution time 375ms (the FPGA part takes 262ms). We have also compared our solution in terms of inference speed with a Vitis AI implementation proposed by Xilinx (19 Hz frame rate). Especially, we have thoroughly investigated the fundamental causes of differences in the frame rate of both solutions. The code is available at https://github.com/vision-agh/pp-finn.
Cone beam computed tomography (CBCT) guidance is helpful in reducing dose exposure to pediatric patients undergoing radiofrequency ablation of osteoid osteoma
Authors: Fiore Francesco , Somma Francesco , D’Angelo Roberto , Tarotto Luca , Stoia Vincenzo
Published: December 2021

Purpose

To assess efficacy and safety of cone beam computed tomography (CBCT) in the radiofrequency ablation (RFA) of osteoid osteoma (OO) in children and adolescents, and to compare technical success, clinical success, radiation dose and procedure duration time of CBCT guidance to conventional computed tomography (CT) guidance.

Materials and methods

Between 2015 and 2019, 53 consecutive percutaneous RFA were performed on pediatric patients with CBCT or conventional CT guidance, respectively, in 24 and 29 children and adolescents with 24-month follow-up. Dose area product (DAP) and dose length product (DLP) were recorded, respectively, for CBCT and conventional CT and converted to effective doses (ED).

Results

CBCT and conventional CT groups were similar in terms of patient age and weight, tumor size and tumor location. Technical success was achieved in all cases. Primary clinical success was 91.67% (22/24) for the CBCT group and 89.66% (26/29) for the conventional CT group. Mean DAP was 64.75Gycm2 (range 6.0–266.7). Mean DLP was 972.62mGycm (range 337–2344). ED was significantly lower in the CBCT group compared to the conventional CT group (0.34 mSv vs. 5.53 mSv, p = 0.0119). Procedure duration time was not significantly longer in the CBCT group (102.25 min vs. 92.34 min, p = 0.065). No major complication was registered. Minor complications were observed in 4 patients (2 in CBCT; 2 in conventional CT).

Conclusions

Compared to conventional CT guidance, CBCT guidance for percutaneous OO ablation shows similar technical and clinical success rates, with reduced radiation dose and equivalent procedure duration time. This technique helps sparing dose exposure to pediatric patients.
Integrated petrographic and geochemical analysis of the Langobard age pottery of Szólád, Western Hungary
Authors: Bajnok Katalin , Kovács Zoltán , Gait John , Maróti Boglárka , Csippán Péter , Harsányi Ildikó , Párkányi Dénes , Skriba Péter , Winger Daniel , von Freeden Uta , Vida Tivadar , Szakmány György
Published: December 2021

This study presents the results of the petrographic and geochemical analyses of the entire pottery assemblage discovered at the sixth-century (AD) cemetery of Szólád, Western Hungary, associated with the Langobard era in the territory of the former Roman province of Pannonia. Szólád is one of the most prominent archaeological sites of this period, where prior studies have shown that the cemetery was used for ca. one or two generations by a migrating group of diverse genetic background. The present work is the first integrated typological and archaeological science pottery analysis from the early migration period (fifth to sixth century) Hungary. We applied polarising light optical microscopy (OM), prompt gamma activation analysis (PGAA), and neutron activation analysis (NAA) on all samples and, additionally, scanning electron microscopy equipped with energy dispersive spectrometry (SEM–EDS) on one selected sample. One main fabric group with three subgroups were defined by OM, to which the majority of the samples belong. This fabric group was characterised by aplastic inclusions derived from a carbonate-cemented sandstone typical of the environs of Szólád; therefore, the vessels of this fabric group appear to have been produced locally. The remaining four samples display a variety of unique, ungrouped, fabrics (loners) indicative of different recipes and/or the presence of pottery originating from outside of the region. Our study concludes that the community associated with the cemetery favoured burying pots with the deceased that stylistically resembled archaic “Elbe Germanic” traditions, but which were in fact made locally. However, in some cases, relationships with more distant territories and cultural traditions are also represented.
Land Use Effects on Climate: Current State, Recent Progress, and Emerging Topics
Authors: Pongratz Julia , Schwingshackl Clemens , Bultan Selma , Obermeier Wolfgang , Havermann Felix , Guo Suqi
Published: December 2021

Purpose of Review

As demand for food and fiber, but also for negative emissions, brings most of the Earth’s land surface under management, we aim to consolidate the scientific progress of recent years on the climatic effects of global land use change, including land management, and related land cover changes (LULCC).

Recent Findings

We review the methodological advances in both modeling and observations to capture biogeochemical and biogeophysical LULCC effects and summarize the knowledge on underlying mechanisms and on the strength of their effects. Recent studies have raised or resolved several important questions related to LULCC: How can we derive CO2 fluxes related to LULCC from satellites? Why are uncertainties in LULCC-related GHG fluxes so large? How can we explain that estimates of afforestation/reforestation potentials diverge by an order of magnitude? Can we reconcile the seemingly contradicting results of models and observations concerning the cooling effect of high-latitude deforestation?

Major progress has been achieved in understanding the complementarity of modeling, observations, and inventories for estimating the impacts of various LULCC practices on carbon, energy, and water fluxes. Emerging fields are the operationalization of the recently achieved integration of approaches, such as a full greenhouse gas balance of LULCC, mapping of emissions from global models to country-reported emissions data, or model evaluation against local biogeophysical observations. Fundamental challenges remain, however, e.g., in separating anthropogenic from natural land use dynamics and accurately quantifying the first. Recent progress has laid the foundation for future research to integrate the local to global scales at which the various effects act, to create co-benefits between global mitigation, including land-based carbon dioxide removal, and changes in local climate for effective adaptation strategies.
Biochemical Changes During the First Year of Feminizing Hormone Therapy in Transfeminine Individuals
Authors: Hojbjerg Johanne Andersen , Højgaard Astrid Ditte , Hvas Anne-Mette
Published: December 2021

Background

Persons with assigned male sex at birth (AMAB) might wish to obtain feminization and/or demasculinization according to the person's gender identity and are therefore treated with estradiol and/or antiandrogens.

Aim

The aim was to evaluate biochemical changes and side effects in AMAB individuals treated with guideline-based feminizing hormone treatment (FHT).

Methods

Medical charts of 99 AMAB individuals ≥ 18 years referred to the Center for Gender Identity; Aalborg University hospital, Denmark, between January 2017 and July 2019 were reviewed to identify adverse side effects. Furthermore, data from the laboratory information system (Labka II) were retrieved to obtain biochemical parameters. Biochemical plasma concentrations after initiation of FHT were compared to concentrations prior to FHT and to existing guidelines.

Outcomes

After 11–19 months, 29% of the trans feminine individuals had plasma estradiol concentrations within the treatment target.

Results

The plasma concentration of estradiol varies greatly during FHT. Plasma levels of estrogen were within the treatment target after 11–19 months of treatment, whereas 100% had concentrations within the reference range for premenopausal cis-women. Furthermore, plasma concentrations of lipids and hematological parameters approached female reference ranges after 11 months of FHT.

Clinical Implications

The target levels of plasma estradiol concentrations during FHT could be expanded, making the wanted physiological changes easier to obtain.

Strengths & Limitation

This cohort study included 99 AMAB individuals and biochemical evaluation was possible in 67 individuals. Only one individual was lost during follow-up. However, the follow-up period was limited making evaluation of long-term side effects impossible.

Conclusion

Plasma concentration of estradiol varies greatly during guideline based FHT, making plasma estradiol levels within the target level difficult to attain.
The Temporal Association of Depression and Anxiety in Young Men with Erectile Dysfunction
Authors: Manalo Tad A. , Biermann Henry D. , Patil Dattatraya H. , Mehta Akanksha
Published: December 2021

Background

Erectile dysfunction (ED) is a multidimensional sexual disorder that is being increasingly diagnosed in younger men. Although mental illnesses such as depression and anxiety are known risk factors for ED, the association between these conditions and ED has been understudied in young men.

Aim

To explore the temporal association between depression, anxiety, and ED in a population-based cohort of young men.

Methods

Using 2009–2018 MarketScan Commercial Claims data, we identified all men with ED aged 18–40 years (cases). Using ICD-9/-10 codes and prescription data, we evaluated the prevalence and incidence of depression and anxiety in this cohort. Cases were matched with men without a diagnosis of ED (controls) based on age, Charlson Comorbidity Index, history of hypertension, geographic region, and year of presentation. We examined the prevalence of depression and anxiety within 12 months prior to ED diagnosis and incidence of depression and anxiety up to 36 months after ED diagnosis in cases vs controls. Differences between cases and controls were tested with Wilcoxon rank-sum test for numerical covariates, and chi-square test for categorical covariates. Significance was set at P < .05.

Outcomes

Prevalence and incidence of depression and anxiety in young men with and without ED.

Results

Within the 12-month period preceding ED diagnosis, the prevalence of depression and anxiety in cases vs controls were 17.1% vs 12.9%, respectively (P < .001). The incidence of depression and anxiety were higher amongst cases vs controls at 12- (11.7% vs 6.3%), 24- (14.5% vs 9.0%,) and 36- (15.9% vs 10.6%) months following ED diagnosis (P < .001).

Clinical Implications

High incidence and prevalence of depression and anxiety in young men diagnosed with ED highlight the importance of normalizing mental health screenings and routine psychiatric follow-up in this population.

Strengths & Limitations

Our contemporary, case-control study utilizes a population-based cohort of young men with ED to study the temporal association between depression, anxiety, and ED, which is understudied to date. The MarketScan commercial claims database used in this analysis includes men covered by private insurers only and lacks data on symptoms and treatments.

Conclusion

Young men with ED had significantly higher rates of depression and anxiety both before and after ED diagnosis in comparison to young men without ED.
IMPROVING AUTOMOBILE INSURANCE CLAIMS FREQUENCY PREDICTION WITH TELEMATICS CAR DRIVING DATA
Authors: Meng Shengwang , Wang He , Shi Yanlin , Gao Guangyuan
Published: December 2021

Novel navigation applications provide a driving behavior score for each finished trip to promote safe driving, which is mainly based on experts’ domain knowledge. In this paper, with automobile insurance claims data and associated telematics car driving data, we propose a supervised driving risk scoring neural network model. This one-dimensional convolutional neural network takes time series of individual car driving trips as input and returns a risk score in the unit range of (0,1). By incorporating credibility average risk score of each driver, the classical Poisson generalized linear model for automobile insurance claims frequency prediction can be improved significantly. Hence, compared with non-telematics-based insurers, telematics-based insurers can discover more heterogeneity in their portfolio and attract safer drivers with premiums discounts.
Clinical and translational science award T32/TL1 training programs: program goals and mentorship practices
Authors: Sancheznieto Fátima , Sorkness Christine A. , Attia Jacqueline , Buettner Kathryn , Edelman David , Hobbs Stuart , McIntosh Scott , McManus Linda M. , Sandberg Kathryn , Schnaper H. William , Scholl Linda , Umans Jason G. , Weavers Karen , Windebank Anthony , McCormack Wayne T.
Published: December 2021

Introduction:

A national survey characterized training and career development for translational researchers through Clinical and Translational Science Award (CTSA) T32/TL1 programs. This report summarizes program goals, trainee characteristics, and mentorship practices.

Methods:

A web link to a voluntary survey was emailed to 51 active TL1 program directors and administrators. Descriptive analyses were performed on aggregate data. Qualitative data analysis used open coding of text followed by an axial coding strategy based on the grounded theory approach.

Results:

Fifty out of 51 (98%) invited CTSA hubs responded. Training program goals were aligned with the CTSA mission. The trainee population consisted of predoctoral students (50%), postdoctoral fellows (30%), and health professional students in short-term (11%) or year-out (9%) research training. Forty percent of TL1 programs support both predoctoral and postdoctoral trainees. Trainees are diverse by academic affiliation, mostly from medicine, engineering, public health, non-health sciences, pharmacy, and nursing. Mentor training is offered by most programs, but mandatory at less than one-third of them. Most mentoring teams consist of two or more mentors.

Conclusions:

CTSA TL1 programs are distinct from other NIH-funded training programs in their focus on clinical and translational research, cross-disciplinary approaches, emphasis on team science, and integration of multiple trainee types. Trainees in nearly all TL1 programs were engaged in all phases of translational research (preclinical, clinical, implementation, public health), suggesting that the CTSA TL1 program is meeting the mandate of NCATS to provide training to develop the clinical and translational research workforce.
Role of geographic risk factors and social determinants of health in COVID-19 epidemiology: Longitudinal geospatial analysis in a midwest rural region
Authors: Wheeler Philip H. , Patten Christi A. , Wi Chung-Il , Bublitz Joshua T. , Ryu Euijung , Ristagno Elizabeth H. , Juhn Young J.
Published: December 2021

Background:

Studies examining the role of geographic factors in coronavirus disease-2019 (COVID-19) epidemiology among rural populations are lacking.

Methods:

Our study is a population-based longitudinal study based on rural residents in four southeast Minnesota counties from March through October 2020. We used a kernel density estimation approach to identify hotspots for COVID-19 cases. Temporal trends of cases and testing were examined by generating a series of hotspot maps during the study period. Household/individual-level socioeconomic status (SES) was measured using the HOUSES index and examined for association between identified hotspots and SES.

Results:

During the study period, 24,243 of 90,975 residents (26.6%) were tested for COVID-19 at least once; 1498 (6.2%) of these tested positive. Compared to other rural residents, hotspot residents were overall younger (median age: 40.5 vs 43.2), more likely to be minorities (10.7% vs 9.7%), and of higher SES (lowest HOUSES [SES] quadrant: 14.6% vs 18.7%). Hotspots accounted for 30.1% of cases (14.5% of population) for rural cities and 60.8% of cases (27.1% of population) for townships. Lower SES and minority households were primarily affected early in the pandemic and higher SES and non-minority households affected later.

Conclusion:

In rural areas of these four counties in Minnesota, geographic factors (hotspots) play a significant role in the overall burden of COVID-19 with associated racial/ethnic and SES disparities, of which pattern differed by the timing of the pandemic (earlier in pandemic vs later). The study results could more precisely guide community outreach efforts (e.g., public health education, testing/tracing, and vaccine roll out) to those residing in hotspots.
Variation, mosaicism and degeneracy in the hominin foot
Authors: McClymont J. , Davids K. , Crompton R.H.
Published: December 2021

The fossil record is scarce and incomplete by nature. Animals and ecological processes devour soft tissue and important bony details over time and, when the dust settles, we are faced with a patchy record full of variation. Fossil taxa are usually defined by craniodental characteristics, so unless postcranial bones are found associated with a skull, assignment to taxon is unstable. Naming a locomotor category based on fossil bone morphology by analogy to living hominoids is not uncommon, and when no single locomotor label fits, postcrania are often described as exhibiting a ‘mosaic’ of traits. Here, we contend that the unavoidable variation that characterises the fossil record can be described far more rigorously based on extensive work in human neurobiology and neuroanatomy, movement sciences and motor control and biomechanics research. In neurobiology,degeneracyis a natural mechanism of adaptation allowing system elements that are structurally different to perform the same function. This concept differs fromredundancyas understood in engineering, where the same function is performed by identical elements. Assuming degeneracy, structurally different elements are able to produce different outputs in a range of environmental contexts, favouring ecological robusticity by enabling adaptations. Furthermore, as degeneracy extends to genome level, genetic variation is sustained, so that genes which might benefit an organism in a different environment remain part of the genome, favouring species’ evolvability.
REPRESENTING THE DEMOS: ADAPTING INSIGHTS FROM THE CONSTRUCTIVIST TURN IN POLITICAL REPRESENTATION
Authors: Simonton Matt
Published: December 2021

One of the commonest clichés in the study of ancient and modern democracy is the claim that the former is ‘direct’, the latter ‘representative’. A few scholars have recently explored areas in which the Classical Athenian democracy had representative features, particularly the magistracies. These studies continue, however, to understand ‘political representation’ according to the definition proposed by the political scientist Hanna Pitkin, that is, as ‘acting [on the part of the political representative] in the interest of the represented, in a manner responsive to them’. In this paper I introduce the insights of the recent ‘constructivist turn’ in studies of political representation to the analysis of Athenian politics in the hope of suggesting, in what will necessarily be a brief and incomplete exercise, how productive this exciting new paradigm can be for understanding the dynamics of ancient democracy. I first lay out the basic tenets of constructivist representation, particularly the notion of the ‘representative claim’ as developed by the political theorist Michael Saward, and argue for their suitability for studying ancient Greek history and political thought. Next, I adapt the model of the representative claim to two episodes of Athenian democratic deliberation, showing how it illuminates processes of demotic will- and identity-formation. I conclude by briefly underscoring how approaching Athenian politics in terms of constructivist notions of representation restores an aesthetic dimension to ancient democratic debate, one that allows us to compare more productively the ‘demos’ of symbouleutic oratory with its counterparts in poetry, sculpture, and other media, namely as a represented object fashioned for creative and rhetorical purposes.
WAS THEPOLISA PERSON IN CLASSICAL ATHENS? CIVIC BODIES AND CHORAL POLITICS IN THE THEATER
Authors: Hanink Johanna
Published: December 2021

In hisHistory of the Peloponnesian War, Thucydides waits until he has passed the midpoint of Book 1 to introduce an individual speaking ‘character’ into his narrative. He does not do so until the scene of the Congress at Sparta (1.67–88), where it is first ‘the Corinthians’ and then ‘the Athenians’ who plead their cases before the Spartan assembly. One of the functions of this scene is to illustrate the internal division of opinion among the Spartans, and Thucydides now brings two distinct, elite Spartans onstage to voice their conflicting perspectives: King Archidamus addresses his countrymen urging caution (1.80–5), while the ephor Sthenelaidas makes suitably laconic remarks pressing for war (1.86). Before this turning point, Thucydides had carried out his analysis of the war's causes exclusively with reference to foreign rulers and Greekpolis-populations (‘the Athenians’, ‘the Spartans’, etc.)—and not to any individual actors or leaders of thosepoleis, such as Archidamus and Sthenelaidas of Sparta.
Another World? East Africa, Decolonisation, and the Global History of the Mid-Twentieth Century
Authors: Milford Ismay , McCann Gerard , Hunter Emma , Branch Daniel
Published: December 2021

This article proposes that there is a gap in our current understanding of the globalising and deglobalising dynamics of mid-twentieth-century East Africa, one that might be addressed by consolidating and taking forward recent developments in the historiography of decolonisation. Recent work by international historians has recovered the connected world of the 1940s to 1960s: the era of new postcolonial states, the ‘Bandung moment’, pan-African cooperation, and the early Cold War. Yet East Africa is less prominent in these histories than we might expect, despite the vibrancy of current work on this period in Kenya, Uganda, and Tanzania. Bringing these two fields into dialogue, through an explicitly regional East African framework and with a particular focus on individual lives, expands our understanding not only of the ‘globalisation of decolonisation’ but also of the deglobalising dynamics of the following decades that are frequently reduced to a history of global economic crisis.
The acoustics of word-initial and word-internal voiced stops in Somali
Authors: Bendjaballah Sabrina , Le Gac David
Published: December 2021

This article seeks to determine the acoustic correlates of gemination in Standard Somali (Afroasiatic, Cushitic), in particular whether closure duration is the primary acoustic correlate distinguishing singleton and geminate stops, with immediate consequences for the analysis of word-initial strengthening. We provide an acoustic analysis of word-initial and word-internal voiced singletons as well as of their geminate counterparts on the basis of a production experiment conducted with four native speakers. Three temporal and four non-temporal acoustic properties of /b d ɡ/ and /bb dd ɡɡ/ are examined and systematically compared (closure duration, release burst duration, vowel duration; and closure amplitude, release amplitude, presence of a release burst, (de)voicing). We argue that the opposition between singleton and geminate voiced stops is primarily realized as the manner contrast approximant [β̞ ð̞ ɣ̞] vs. stop [b d ɡ]. Word-initially, Somali exhibits various peculiarities that are reminiscent of the cross-linguistically attested phenomenon of domain-initial strengthening. This article provides the first study of this phenomenon in Somali. We establish that word-initial /b d ɡ/ and word-medial /bb dd ɡɡ/ share the same closure duration, release burst duration, and vowel duration within the Prosodic Word. They also have a similar closure amplitude, and voicing properties. Moreover, the acoustic properties of word-initial /b d ɡ/ remain constant, and do not depend on their position in the prosodic hierarchy. On the basis of these results, the article also aims at providing new insights in the phonological representation of Somali geminates and word boundaries, and thus contributes to the understanding of word-initial strengthening in Somali.
Stride segmentation of inertial sensor data using statistical methods for different walking activities
Authors: Jain Rahul , Semwal Vijay Bhaskar , Kaushik Praveen
Published: December 2021

Human gait data can be collected using inertial measurement units (IMUs). An IMU is an electronic device that uses an accelerometer and gyroscope to capture three-axial linear acceleration and three-axial angular velocity. The data so collected are time series in nature. The major challenge associated with these data is the segmentation of signal samples into stride-specific information, that is, individual gait cycles. One empirical approach for stride segmentation is based on timestamps. However, timestamping is a manual technique, and it requires a timing device and a fixed laboratory set-up which usually restricts its applicability outside of the laboratory. In this study, we have proposed an automatic technique for stride segmentation of accelerometry data for three different walking activities. The autocorrelation function (ACF) is utilized for the identification of stride boundaries. Identification and extraction of stride-specific data are done by devising a concept of tuning parameter (
$t_{p}$
) which is based on minimum standard deviation (
$\sigma$
). Rigorous experimentation is done on human activities and postural transition and Osaka University – Institute of Scientific and Industrial Research gait inertial sensor datasets. Obtained mean stride duration for level walking, walking upstairs, and walking downstairs is 1.1, 1.19, and 1.02 s with 95% confidence interval [1.08, 1.12], [1.15, 1.22], and [0.97, 1.07], respectively, which is on par with standard findings reported in the literature. Limitations of accelerometry and ACF are also discussed. stride segmentation; human activity recognition; accelerometry; gait parameter estimation; gait cycle; inertial measurement unit; autocorrelation function; wearable sensors; IoT; edge computing; tinyML.
The metaethical dilemma of epistemic democracy
Authors: Schamberger Christoph
Published: December 2021

Epistemic democracy aims to show, often by appeal to the Condorcet Jury Theorem, that democracy has a high chance of reaching correct decisions. It has been argued that epistemic democracy is compatible with various metaethical accounts, such as moral realism, conventionalism and majoritarianism. This paper casts doubt on that thesis and reveals the following metaethical dilemma: if we adopt moral realism, it is doubtful that voters are, on average, more than 0.5 likely to track moral facts and identify the correct alternative. By contrast, if we adopt conventionalism or majoritarianism, we cannot expect that voters are both competent and sincere. Either way, the conditions for the application of Condorcet’s theorem are not met.
Roadsides are key habitats for birds in the Argentine Pampas: conservation and management implications
Authors: Depalma Daniela María , Lacoretz Mariela Verónica , Zilli Cecilia , Charnelli Emilio Martín , Mermoz Myriam Emilia
Published: December 2021

Unexploited public areas such as roadsides could provide habitat to help preserve biodiversity in South America, as in other regions. Our objective was to determine the importance of the roadsides of the Argentine Pampas for native birds and to suggest management strategies. We surveyed birds inhabiting roadsides in all seasons and determined whether roadsides were used as habitat. We recorded a total of 95 species on roadsides, which represents 55% of those species described from the area. Species included specialists of grassland, wetland and woodland, 4 vulnerable species and 19 declining species. Bird richness decreased in winter, as well as grassland specialists’ abundances. Most individuals used roadsides for foraging and performing reproduction-related behaviours, mainly on native trees; these and tall grass were the main substrates. We conclude that many species of birds use the habitat provided by roadsides, and we recommend management strategies such as favouring seed availability in winter, restoring trees and tall grass and increasing vegetation diversity to maximize roadside conservation value.
Policing Jim Crow America: Enforcers’ Agency and Structural Transformations
Authors: Gregory Anthony
Published: December 2021

This is a critical historiographical essay animated by the research question of how the decisions of police and sheriffs illuminated and drove the transformation of white supremacy through different forms from emancipation to the end of Jim Crow segregation. It situates this focus amidst current methodological trends that stress structural oppression and argues that law-enforcers’ agency could illuminate discussions among historians and other scholars about the relationship between formal and informal law alongside the rise of the modern criminological state. The historical importance of enforcers is accentuated in the story told in each section—the shifting demographics of enforcement during Reconstruction; the inequalities of policing alongside lynching in the last decades of the nineteenth century; the complex interplay between policing and segregation statutes, colorblind criminal law, and mob violence in the Jim Crow South; the concurrent modernization of racialized policing nationwide; and the displacement of informal mob law and formal racial caste by a national regime of extralegal police violence, unequal patterns of incarceration and execution, and federal protections of civil liberties and civil rights.
Genetic and Environmental Architecture of Five Factor Model and Super-Factors: An Italian Twin Study
Authors: Gigantesco Antonella , Fagnani Corrado , Alessandri Guido , Carluccio Enrica , Stazi Maria Antonietta , Medda Emanuela
Published: December 2021

No previous research explored the genetic and environmental structure of Big Five dimensions of personality and higher-order factors in a single twin study, except, in part, for just one study. We used the twin design to estimate the effects of genes and environment on both Five Factor model and related second- and third-order factors (i.e., Alpha [stability], Beta [plasticity], and GFP [general factor of personality]). We analyzed data from 314 adult twins (157 pairs: 83 monozygotic, 74 dizygotic; mean age: 52 years) enrolled in the Italian Twin Register. Participants underwent clinical and instrumental evaluations, and completed a 25-adjective list drawn from the Short Adjectives Checklist to Measure Big Five (SACBIF). We applied quantitative genetic models to unravel the sources of variation and covariation for the Big Five and higher-order factors. We found a similar etiological architecture across the different levels of analysis, with moderate to substantial non-additive genetic and unique environmental influences on all the personality traits, and no shared environmental contribution for any of them. We also detected significant genetic correlations for the Big Five dimensions and the Alpha and Beta super-factors. With some limitations, our results suggest that the etiological architecture of personality may be invariant to the factor level of analysis.
Surveys of weed management on flooded rice yields in southern Brazil
Authors: Silva Anelise L. , Streck Nereu A. , Zanon Alencar J. , Ribas Giovana G. , Fruet Bruno L. , Ulguim André R.
Published: December 2021

One of the main limiting factors for high yields of flooded rice (Oryza sativa L.) is the presence of weeds, especially herbicide-resistant weeds. The aim of this study was to evaluate the association of weed management practices adopted by flooded rice farmers in the state of Rio Grande do Sul (RS), Brazil, with grain yield. For this purpose, 324 interview surveys were administered to farmers who supplied information about the history of weed management and yields. The answers to the survey indicated that weedy rice (Oryza sativa L.) and Echinochloa spp. were the most important weeds that occurred in flooded rice areas in RS. Advanced growth stage of weeds and inadequate environmental conditions such as air temperature and relative humidity were listed as the main reasons for low weed control efficacy. Farmers achieved greater rice yields when they adopted rice–soybean [Glycine max (L.) Merr.] (9,140 kg ha−1 average yield) and herbicide site of action rotations (8,801 kg ha−1 average yield) along with tank mixes (8,580 kg ha−1 average yield) as specific management practices for resistant weed control. The use of glyphosate with residual herbicides in a tank mix in the rice spiking stage is the main factor related to greater yields. The postemergence applications and their relationship to delaying of flooding in rice is a factor that reduces rice yield when no spiking glyphosate application was made. Identification of the most important weeds in terms of occurrence and knowledge of the main agronomic practices adopted by farmers are essential so that recommendations for integrated management practices can be adopted in an increasingly accurate and sustainable manner in flooded rice areas in southern Brazil.
An Integer Programming Model for the Selection of Pumped‐Hydro Storage Projects
Authors: Andrade T. , Kelman R. , Cunha T. M. , Albuquerque L. R. , Calili R. F.
Published: December 2021

Energy storage systems—in particular, Pumped Hydropower Storage (PHS)—will be increasingly important to support the transition of power systems toward zero emissions. The reason is that PHS can mitigate the variability and uncertainty of renewable energy production from solar and wind power to balance electricity demand with supply. In this paper, we propose an integer programming problem for PHS siting that uses a Digital Elevation Model (DEM) to meet an energy storage requirement. It assumes the existence of a reservoir, lake, or river, and decides where to build a reservoir that will constitute the PHS with the existing body of water. This model finds minimum‐cost project candidates given parameters such as desired head, power, and operation time. The paper discusses different solution methods to assure reservoir closure and avoid its fragmentation. A heuristic explores the representations of the DEM, from more aggregate to more precise, to sequentially refine the solution based on the last selected site, which reduces computational effort. The formulation is general and the objective function includes both construction and equipment costs. Constraints are related to the energy storage target and reservoir closure based on the DEM. We illustrate the methodology by selecting multiple PHS projects next to the reservoir of the Sobradinho hydropower plant in Brazil. The result of this model can be seen as a bottom‐up step that prepares PHS candidate projects to be considered by an integrated resource planning model in a top‐down step, that would select from these shortlisted projects.
Comparison of Frequency‐Domain Electromagnetic Responses at Different Offsets Based on Exact Calculation of Grounded‐Wire Source
Authors: Xue Guoqiang , Zhou Nannan , Hou Dongyang
Published: December 2021

Subsurface geoelectric structures and resources can be detected based on the propagation of the electromagnetic field. Near‐source electromagnetic methods have recently become the most popular survey mode. However, calculation of the electromagnetic field in the near‐source region with artificial sources has always been performed based on far‐source dipole approximation. Owing to the introduction of artificial sources in the near‐source region, it is challenging to obtain accurate solution of the electromagnetic field based on the relationship between the observation point and the source, thereby affecting the detection accuracy. Specifically, the main problem lies in the position vector of the transmitting source, which is generally neglected in the response calculation based on the plane‐wave theory. Moreover, only far‐source data can be observed in the plane‐wave theory. However, near‐source data have been collected in a near‐source survey, with the dipole approximation resulting in a large error. We introduce a point charge element to decrease or eliminate the error caused by the dipole approximation. The non‐homogeneous Helmholtz equation is first solved using the Green's function. Then, the response expression of the real source, including the source position vector, is obtained by integrating the response of the harmonic point charge element. The substitution of the dipole elements with the point‐charge elements not only reduces the dipole approximation errors but also displays the electromagnetic characteristics of the entire zone, which are verified by the forward modeling and field survey results. The near‐source (offset is 0.8 of the target depth) survey can be realized based on the point charge element.
First Observations of the New MEXART's Digital System
Authors: Gonzalez‐Esparza J. A. , Mejia‐Ambriz J. C. , Aguilar‐Rodriguez E. , Villanueva P. , Andrade E. , Magro A. , Chiello R. , Cutajar D. , Borg J. , Zarb‐Adami K.
Published: December 2021

The Mexican Array Radio Telescope (MEXART) is a transit instrument mainly dedicated to performing interplanetary scintillation (IPS) observations with a central operating frequency of 139.65 MHz. The main scientific objective is to perform studies of solar wind properties and space weather effects. MEXART initially operated with an analog beam former (16 × 16 Butler matrix), which produced 16 fixed latitudinal beams. MEXART began operations and reported the first measurements of IPS sources. MEXART's beam forming system had several problems, however. The North‐South beams had poor directivity, with large side lobes, and the instrument did not achieve the expected performance. Therefore, we commissioned the design and construction of a digital back‐end. The digital system solved the problems with the beam forming, increases the bandwidth, and significantly improves the instrument's sensitivity. In this paper, we present the first light of MEXART's digital system. We describe the new technical capabilities of the instrument, and we show some preliminary results: an estimation of the radio telescope's sensitivity (ΔSmin = 2.28 ± 0.23 Jy), the transit of the Galaxy at 140 MHz with the simultaneous tracking of 62 latitudinal beams, and an example of an IPS observation and the single‐station methodology for calculating the solar wind speed. The new technical capabilities of the radio telescope will provide the potential for participating in several scientific studies. These include solar wind properties, space weather forecasting, ionospheric perturbations, and astrophysical aims such as the monitoring of repeating fast radio bursts and pulsars' observations.
An Improved Zhang's Dynamic Water Balance Model Using Budyko‐Based Snow Representation for Better Streamflow Predictions
Authors: Hwang Jeongwoo , Devineni Naresh
Published: December 2021

Understanding the water balance of a catchment in relation to its regional climate forcings and catchment characteristics is critical for predicting current and future water resources amid changing climate and land cover. This study intends to improve Zhang's monthly water balance model (a physics‐based conceptual hydrologic model) that reflects the physical partitioning process of the hydrological cycle at the basin level based on regional climate and catchment characteristics. The existing model does not include snow process and has confronted evident limitations in snow‐affected areas, which is a critical aspect since snowmelt water has been a significant source of water resources for many regions, especially in the temperate and frigid zones. We introduce a snow module based on surface energy balance and Budyko‐limits on melting and combine it with the existing water balance equations. Moreover, monthly parameterization is applied to the model to better explain the time‐varying hydrological characteristics of a catchment. The proposed model involves five different monthly parameters, which determine the physical partitioning process of the hydrological cycle, and they are regionally calibrated and validated under Budyko‐type constraints. The model is applied to 1,210 basins across the continental United States (CONUS), and the simulated streamflow is compared to the observed data. The proposed model significantly outperformed the original model, improving the median NSE by 31% (from 0.51 to 0.67) and increasing the number of catchments with an acceptable NSE by 58%. The spatial variability of the basin characteristics across the CONUS is also investigated based on the calibrated parameters.