bluuebunny/crossref_metadata_2025 huggingface dataset:
Gender dynamics in seed systems: female makeover or male takeover of specialized sweetpotato seed production, in Lake Zone Tanzania?
Authors: McEwan Margaret A. , Matui Moses S. , Mayanja Sarah , Namanda Sam , Ogero Kwame
Published: March 2023

Interest is growing for the development of inclusive seed production models. However, there is limited understanding of gender-based roles and constraints and how these might influence gender relations in seed production. Through a case study on sweetpotato seed production in Lake Zone Tanzania, this article examines men’s and women’s roles in seed production with the introduction of specialized seed practices and a commercial orientation. The study uses data from 17 field-based plot observations and eight sex disaggregated focus group discussions (FGDs) with 33 (51% women and 48% men) decentralized vine multipliers (DVMs). Participatory, gender-based analytical tools were used to obtain an in-depth understanding of gender dimensions and implications of new seed production practices, the resources required and access to those resources. Our findings show that men and women have complementary roles in specialized seed production, and that men increased their involvement in production and commercialization, especially when larger monetary inputs and transactions took place. Women gained new tangible (income) and intangible (knowledge) assets, which enhanced their community status. Women’s contributions to household income became more visible. In conclusion male-takeover did not take place. There were changes in the perceptions around sweetpotato production and gender relations. As women’s contributions to household income became more visible, they were able to negotiate with their husbands on access to key resources to maintain this household revenue stream. We discuss how the new knowledge and skills related to seed production enhanced women’s status in the community. These dynamics initiated changes in gender relations and challenged prevailing community perceptions on gender roles.
Water and production reflections on the water supply to urban workshops in roman times
Authors: Sánchez López Elena H.
Published: March 2023

Research into water management in Roman towns has traditionally focused on its supply by means of aqueducts and its use in the thermal baths and domus of the elites. However, the urban functions of water included uses that went far beyond recreational, social activities and also included its supply to production facilities. Numerous artisanal activities required large amounts of water, including pottery, textile activities, wickerwork and manufacturing bone or metal instruments. All these activities are commonly identified in Roman towns. In each case, the workshops could have obtained water not only from wells and cisterns, but also through a connection to the urban supply network, thanks to an aqua publica concession. In this study, we compile both archaeological and textual evidence, including literary and legal texts, on the private use of aqua publica for productive activities in urban contexts.
Time as an argument in Roman water law
Authors: Möller Cosima
Published: March 2023

This article analyses the function of time in legal regulations of water use. It is discussed how time units are employed to specify the use of water through servitudes, enabling the involved parties an efficient distribution. In this context, it is examined how the jurists take different approaches when it comes to defining the terms of use and maintenance for a servitude and how the diverging conceptions are influenced by philosophical ideas. Moreover, the legal regulation for usage of multiple parties in irrigation communities is explored. Further, the article deals with the role of time for the formation and nullification of servitudes. The jurists apply different conceptions in deciding whether a servitude can be lost through non-use or created through acquisitive prescription and other means, which take the factor time into account. It becomes evident that the opinions of the jurists derive from philosophically influenced schools of legal thinking. Finally, the time intervals of possession are analysed, which are necessary for allowing judicial protection of water use through the praetor. In order to enforce an interdictum, solely a one-day use of the possessor is required. The conclusion highlights the connection between legal rules and archaeological evidence.
Determining the drilling mud window by integration of geostatistics, intelligent, and conditional programming models in an oilfield of SW Iran
Authors: Kianoush Pooria , Mohammadi Ghodratollah , Hosseini Seyed Aliakbar , Keshavarz Faraj Khah Nasser , Afzal Peyman
Published: March 2023

Accurate knowledge of pore and fracture pressures is essential for drilling wells safely with the desired mud weight (MW). Overpressure occurs when the pore pressure is higher than the normal hydrostatic pressure. There is a challenge regarding the pressure studies domain in an oilfield in SW Iran, where lack of geo-mechanical data limits exact mud window calculation. Also, the reservoir generally consists of carbonate rocks and contains no shale interbeds, so mechanical stratigraphy based on Gamma ray could not be applied. This study is to provide safe drilling considering MW to prevent the flow or loss in the vicinity of the new wells in the studied field. In this research, the formation pressures and mud window models are determined by combining geostatistical, intelligent, and conditional programming models and compared with real data. The conditional programming was also used to correct small out-of-range data. The highest correlation between the final effective pressure and velocity cube was observed in lower Fahliyan Formation with 0.86 and Ilam with 0.71.The modeled MW difference ranged between 2.5 and 30 PCF. Also, the maximum modeled MW is 150 PCF in the upper Fahliyan Formation. Heavy mud of more than 130 PCF is suggested for drilling the Khalij member and continues to the end of stratigraphy column. Best observed correlation comparing the drilled and modeled MW, especially achieved in the Fahliyan reservoir Formation with more than 100 PCF and the Ilam Formation with 80–100 PCF. Finally, 3D formation pressures are presented and recommended for further safe drillings.
Performance forecasting of hydraulically fractured horizontal wells using dynamic-drainage-area concept with correct distance of investigation
Authors: Fan Haijun
Published: March 2023

Performance forecasting of multi-fractured horizontal wells (MFHWs) completed in tight/shale oil or gas reservoirs is of great significance in the development of unconventional resources. Dynamic drainage area (DDA) concept has emerged as a production forecasting methodology for unconventional reservoirs. This paper investigated the DDA method and derived correct expressions of distance of investigation (DOI) for both constant production rate and constant bottom-hole pressure cases by integrating material balance and deliverability equation within the range of DOI. The modified DDA method with correct DOI coefficients provided in this paper permits direct calculation of dynamic performance at arbitrary time steps before the end of transient linear flow. At the same time smooth production forecasting of MFHWs from transient linear to boundary-dominated flow is realized without modification by extra coefficient. Hybrid models such as DDA plus dual-exponential and DDA plus hyperbolic are presented, which can be applied quickly and easily to MFHWs in unconventional reservoirs as alternatives to complex numerical simulation. Meanwhile, average pressure in the range of DDA can be readily obtained with correct DOI coefficients, avoiding complex iterative calculations. The reliability and practicability of this solution have been demonstrated by synthetic and field cases in this work.
Remarks on the pair correlation statistic of Kronecker sequences and lattice point counting
Authors: Weiss Christian
Published: March 2023

In this short note, we reformulate the task of calculating the pair correlation statistics of a Kronecker sequence as a lattice point counting problem. This can be done analogously to the lattice based approach which was used to (re-)prove the famous three gap property for Kronecker sequences. We show that recently developed lattice point counting techniques can then be applied to derive that a certain class of Kronecker sequences have $$\beta $$
β
-pair correlations for all $$0< \beta < 1$$

0
<
β
<
1

.
Application of nonwoven microfiltration membrane on activated sludge final effluent: improving wastewater quality for reuse
Authors: Kabuba J. , Masala M. S. , Topkin J.
Published: March 2023

The application of membrane technology in wastewater treatment for reuse is one of the alternatives to reduce the demand of water in domestic, agricultural and industrial sectors. This study attempts to improve wastewater quality effluent, prior to disinfection, for re-use. Clarifier effluent from a biological nutrient removal (BNR) treatment plant was diverted to a nonwoven membrane pilot filtration unit. It was thus positioned to further enhance the clarifier effluent as a polishing arrangement. Water Quality Index (WQI), Single Factor Pollution Index (Pi), Water Use License (WUL) and removal efficiency methods were used to interpret the water quality data for BNR clarifier effluent and nonwoven membrane permeate. The results showed that this nonwoven microfilter membrane is able to improve wastewater quality from BNR clarifier effluent. Escherichia coli (E. coli) reduction was the highest with a removal efficiency of 90%, followed by chemical oxygen demand 25%, NH4+ 22%, NO3− 12.6%, PO4 7.8%, suspended solids 6.3%. The lowest reduction was electrical conductivity of 5.2%. Permeate results indicated that physiochemical and microbial parameters were complying with the limits of WUL. Pi has revealed that BNR clarifier effluent water quality is medium polluted versus slightly polluted permeate. WQI results for BNR clarifier effluent showed good water quality and the water can be reused for domestic, irrigation and industrial purposes, while permeate WQI results indicated excellent water quality and the water can be reused for drinking, domestic, irrigation and industrial purposes. Outstanding permeate water quality improvement was observed on E.coli counts improving from 4974.48 to 294.33 counts/L. The standard of E.coli according to the WUL at this wastewater care works is 500 counts/L. Results indicate that nonwoven membrane filtration can improve microbial contamination and decrease the demand of chlorine for disinfection of wastewater final effluent. The nonwoven membrane filtration can decrease the water scarcity gap in South Africa for direct water reclamation by improving effluent wastewater.
An algorithm for the non-identifiability of rank-3 tensors
Authors: Santarsiero Pierpaola
Published: March 2023

We present an algorithm aimed to recognize if a given tensor is a non-identifiable rank-3 tensor.
Threshold of 25(OH)D and consequently adjusted parathyroid hormone reference intervals: data mining for relationship between vitamin D and parathyroid hormone
Authors: Gong M. , Wang K. , Sun H. , Wang K. , Zhou Y. , Cong Y. , Deng X. , Mao Y.
Published: March 2023

Purpose

By recruiting reference population, we aimed to (1): estimate the 25(OH)D threshold that maximally inhibits the PTH, which can be defined as the cutoff value for vitamin D sufficiency; (2) establish the PTH reference interval (RI) in population with sufficient vitamin D.

Methods

Study data were retrieved from LIS (Laboratory Information Management System) under literature suggested criteria, and outliers were excluded using Tukey fence method. Locally weighted regression (LOESS) and segmented regression (SR) were conducted to estimate the threshold of 25(OH)D. Multivariate linear regression was performed to evaluate the associations between PTH concentration and variables including 25(OH)D, gender, age, estimated glomerular filtration rate (EGFR), body mass index (BMI), albumin-adjusted serum calcium (aCa), serum phosphate(P), serum magnesium(Mg), and blood collection season. Z test was adopted to evaluate whether the reference interval should be stratified by determinants such as age and gender.

Results

A total of 64,979 apparently healthy subjects were recruited in this study, with median (Q1, Q3) 25(OH)D of 45.33 (36.15, 57.50) nmol/L and median (Q1, Q3) PTH of 42.19 (34.24, 52.20) ng/L. The segmented regression determined the 25(OH)D threshold of 55 nmol/L above which PTH would somewhat plateau and of 22 nmol/L below which PTH would rise steeply. Multivariate linear regression suggested that gender, EGFR, and BMI were independently associated with PTH concentrations. The PTH RI was calculated as 22.17–72.72 ng/L for subjects with 25(OH)D ≥ 55 nmol/L with no necessity of stratification according to gender, age, menopausal status nor season.

Conclusion

This study reported 25(OH)D thresholds of vitamin D sufficiency at 55 nmol/L and vitamin D deficiency at 22 nmol/L, and consequently established PTH RIs in subjects with sufficient vitamin D for northern China population for the first time.
Recent Advances and Perspectives of Lewis Acidic Etching Route: An Emerging Preparation Strategy for MXenes
Authors: Huang Pengfei , Han Wei-Qiang
Published: March 2023

Since the discovery in 2011, MXenes have become the rising star in the field of two-dimensional materials. Benefiting from the metallic-level conductivity, large and adjustable gallery spacing, low ion diffusion barrier, rich surface chemistry, superior mechanical strength, MXenes exhibit great application prospects in energy storage and conversion, sensors, optoelectronics, electromagnetic interference shielding and biomedicine. Nevertheless, two issues seriously deteriorate the further development of MXenes. One is the high experimental risk of common preparation methods such as HF etching, and the other is the difficulty in obtaining MXenes with controllable surface groups. Recently, Lewis acidic etching, as a brand-new preparation strategy for MXenes, has attracted intensive attention due to its high safety and the ability to endow MXenes with uniform terminations. However, a comprehensive review of Lewis acidic etching method has not been reported yet. Herein, we first introduce the Lewis acidic etching from the following four aspects: etching mechanism, terminations regulation, in-situ formed metals and delamination of multi-layered MXenes. Further, the applications of MXenes and MXene-based hybrids obtained by Lewis acidic etching route in energy storage and conversion, sensors and microwave absorption are carefully summarized. Finally, some challenges and opportunities of Lewis acidic etching strategy are also presented.
The innovation of iron and the Xiongnu – a case study from Central Mongolia
Authors: Brosseder Ursula , Pohl Ernst , Tseveendorzh Damdinsüren , Munkhbayar Lkhagvadorzh , Osinska Alexandra , Linzen Sven
Published: March 2023

This article presents the oldest iron smelting furnaces of the Xiongnu Empire period in central Mongolia and argues that a significant smelting center existed at the site of Baga Nariĭn Am. Five iron smelting furnaces and four smelting installations were excavated, with a total 26 furnaces further identified through SQUID magnetometry. In combination with a review of data on iron production in contemporary Mongolia, the Transbaikal region, Tuva, the Minusinsk Basin and the Altai, we argue that this new data alters existing narratives of the adoption of iron in eastern Eurasia. While iron smelting as such was adopted from the Minusinsk Basin, where the oldest iron smelting furnaces in eastern Eurasia are currently found, we suggest that the driving force behind the massive boom in iron metallurgy from the second century BCE onward was the Xiongnu Empire. During the course of the Xiongnu Empire, the development of more efficient iron technology is evident, with the steppe empire also inventing a new furnace type. These findings are significant for understanding the dynamics of iron industries in the eastern Eurasian Steppe and paves the way for necessary work on metallurgical installations in the Minusinsk Basin and Tuva.
Man-making, Nation-Building and National Reconstruction: the Engaged Hinduism of the RSS and the Vivekananda Kendra
Authors: Beckerlegge Gwilym
Published: March 2023

The offering of sevā in its more recent sense of organized service to humanity has been central to engaged Hinduism. Despite the scale of the practice of sevā by Hindutva-inspired organizations, scholarly studies have tended to focus on the political rather than the cultural and religious dimensions of their activities. An examination of the nature and extent of these organizations’ commitment to sevā reveals that, far from being monolithic in character, these organizations are characterized by different blends and balances of cultural, political, and religious aspirations and symbolism. This article explores examples of sevā activities drawn from two Hindutva-inspired organizations, the Rashtriya Svayamsevak Sangh (RSS) and the more recently formed Vivekananda Kendra, and aspects of the development of this practice within these groups. It considers what such groups might understand by engaged Hinduism, their goals, how they seek to realize these goals, and the relationship between their sevā activities and their wider cultural and political agendas, and some would say, in the terms of this volume, about the “benevolence” of their aims.
Phytochemical-Based Evidence of the Health Benefits of Bidens Pilosa Extracts and Cytotoxicity
Authors: Idris Oladayo Amed , Kerebba Nasifu , Horn Suranie , Maboeta Mark Steve , Pieters Rialet
Published: March 2023

Purpose

Bidens pilosa L. is traditionally used as a flavouring agent in foods, in the treatment of diseases, in agriculture as a biopesticide and herbicide, and in the phytoremediation of soils contaminated with heavy metals. The vast range of uses of B. pilosa for a variety of purposes is questionable, hence motivating the objectives of this study, which are to assess the cytotoxicity, health benefits, and/or risks of B. pilosa using chemical-based evidence.

Methods

A real-time cell analysis (xCELLigence system), ultra-high-performance liquid chromatography coupled to a quadrupole-time-of-flight mass spectrometer, high-performance liquid chromatography with a diode array detector, and chemical-based spectrophotometric methods were adopted in the study.

Results

High concentrations of the ethanol extracts exhibited cytotoxic activity on HepG2 (cancerous), and Vero (non-cancerous) cell lines, whereas the water extracts promoted cell proliferation at selected concentrations. The chemical profiling enabled the separation as well as characterisation of 137 phytochemicals. These were mainly phenolic acids, flavonoids, fatty acids, coumarins, and furanocoumarins. There was no toxic compound identified.

Conclusion

The ethanol extracts are generally more potent and exhibit stronger antioxidant activity and cytotoxicity, probably due to the presence of more flavonoids and phenolic acids, validating the uses of B. pilosa and its relevance as a source of functional phytochemicals.
The earlySTEM Program: An Evaluation Through Teacher Perceptions
Authors: Mesutoglu Canan , Corlu Mehmet Sencer
Published: March 2023

Conceptually grounded curricular materials in the context of professional development programs facilitate teachers’ adoption of new pedagogies. Even though science, technology, engineering, and mathematics (STEM) professional development opportunities for early grade level teachers continue to receive attention, one existing challenge is to support teachers further in implementing well-defined integrated STEM curricula. The earlySTEM program supports K–4 teachers with the systematically developed earlySTEM curriculum, its associated curricular materials, and year-long mentoring. The program was implemented in 26 schools. This mid-evaluation investigated teacher perceptions of the earlySTEM program with a focus on contributions and challenges. A total of 134 teachers from the 26 schools responded to a survey with open-ended questions. Survey data were analyzed using a descriptive approach. The findings indicated that the teachers had positive experiences with the earlySTEM program. The results revealed that the earlySTEM program is perceived to have contributed to (a) teachers’ STEM teaching skills and STEM conceptualizations and (b) students’ skills development and awareness on the connection of the curriculum content to real-world problems. The results also document the perceived challenge in implementing the earlySTEM curriculum: need for more classroom time. The conclusions offer insights for similar program designs.
Effects of Covid-19 on the elective surgery: an approach based on the case of the Italian Province of Bolzano
Authors: Bonetti Mirko , Melani Carla
Published: March 2023

Background

As of February 2020, the rise of COVID-19 cases led to significant pressures in the Northern parts of Italy, including the province of Bolzano (a small territorial reality on the border between Italy and Austria), and left the Italian National Health System (NHS) unprepared for the initial wave of the SARS-CoV-2 pandemic.

Objective/Methods

By dividing the analyses into two phases, the study assesses the effect of COVID-19 for the years 2018–2019 and 2020–2021. The first phase highlights the hospitalization rates in the Province of Bolzano in comparison to other Italian regions. In the second step, the Systematic Component of Variation (SCV) has been applied to calculate the differences between the admission rates for the elective surgery (tonsillectomy, vein stripping, hip replacement, knee replacement, and arthroscopy) in the four health districts (HDs) of the Province of Bolzano.

Results

Overall, the findings demonstrate that the effect of COVID-19 cases has resulted in a 20% reduction in hospitalization rates. A variation of less than 30% for knee and hip replacements and up to 75% for vein stripping is seen for elective surgeries. According to the SCV values for each elective procedure, the results indicate comparable levels of variation across the two time periods, with tonsillectomy showing the lowest levels of variation, arthroscopy and vein stripping having the highest levels, hip replacement having a high level and knee replacement having a low-medium level.

Conclusions

The data show no significant changes in the variation between the four HDs in the province of Bolzano, suggesting that the COVID-19 cases have a proportionate impact on hospitalization rates.
Evaluation of an experiential training program in patient-centered outcomes and comparative effectiveness research for diverse researcher communities and health care organizations
Authors: Buchwald Dedra S. , Rogers Megan H. , Rose Barbara A. , Bresnahan Brian W. , Devine Beth , LeResche Linda , Nelson Lonnie A. , Patrick Donald L. , Lavallee Danielle C. , Garrison Michelle M. , White Andrew A. , Kessler Larry G.
Published: March 2023

Background/Objective:

The goal of the Patient-Centered Outcomes Research Partnership was to prepare health care professionals and researchers to conduct patient-centered outcomes and comparative effectiveness research (CER). Substantial evidence gaps, heterogeneous health care systems, and decision-making challenges in the USA underscore the need for evidence-based strategies.

Methods:

We engaged five community-based health care organizations that serve diverse and underrepresented patient populations from Hawai’i to Minnesota. Each partner nominated two in-house scholars to participate in the 2-year program. The program focused on seven competencies pertinent to patient-centered outcomes and CER. It combined in-person and experiential learning with asynchronous, online education, and created adaptive, pragmatic learning opportunities and a Summer Institute. Metrics included the Clinical Research Appraisal Inventory (CRAI), a tool designed to assess research self-efficacy and clinical research skills across 10 domains.

Results:

We trained 31 scholars in 3 cohorts. Mean scores in nine domains of the CRAI improved; greater improvement was observed from the beginning to the midpoint than from the midpoint to conclusion of the program. Across all three cohorts, mean scores on 52 items (100%) increased (p ≤ 0.01), and 91% of scholars reported the program improved their skills moderately/significantly. Satisfaction with the program was high (91%).

Conclusions:

Investigators that conduct patient-centered outcomes and CER must know how to collaborate with regional health care systems to identify priorities; pose questions; design, conduct, and disseminate observational and experimental research; and transform knowledge into practical clinical applications. Training programs such as ours can facilitate such collaborations.
Designing with biobased composites: understanding digital material perception through semiotic attributes
Authors: Thundathil Manu , Nazmi Ali Reza , Shahri Bahareh , Emerson Nick , Müssig Jörg , Huber Tim
Published: March 2023

Biobased composites, which are considered a sustainable alternative to plastics, are yet to create a significant influence on product design and manufacturing. A key reason for this is perceptual handicaps associated with biobased composites and this study was aimed at understanding the mechanisms behind biocomposite perception, in the context of digital visuals. This study of digital biocomposite visuals demonstrated that material perception is influenced by the visual characteristics of the material. Data analysis of the perceptual attributes of the materials pointed towards clear ‘clustering’ of the materials against these attributes. Analysis shows that visual features like fibres and surface appearance may impact aesthetic and functional evaluation and there is no effect on age, gender or polymer type. We also propose a reference framework to categorise biobased composites based on visual order.
High-efficiency bismuth borate-based optical parametric chirped pulse amplifier with approximately 2.1 mJ, 38 fs output pulses at approximately 2150 nm
Authors: Petrulėnas Augustinas , Mackonis Paulius , Rodin Aleksej M.
Published: March 2023

We present a compact and cost-effective mJ-level femtosecond laser system operating at a center wavelength of approximately 2.15 μm. An affordable two-stage ytterbium-doped yttrium aluminum garnet (Yb:YAG) chirped pulse amplifier provides more than 10 mJ, approximately 1.2 ps pulses at 1030 nm to pump a three-stage optical parametric chirped pulse amplifier (OPCPA) based on bismuth borate crystals and to drive the supercontinuum seed in the YAG crystal. The energy of the amplified pulses in the wavelength range of 1.95–2.4 μm reached 2.25 mJ with a pump-to-signal conversion efficiency of approximately 25% in the last OPCPA stage. These pulses were compressed to 38 fs in a pair of Suprasil 300 glass prisms.
Silurian inverted Barrovian-type metamorphism in the Western Sierras Pampeanas (Argentina): a case of top to bottom heating?
Authors: Verdecchia Sebastián O. , Casquet Cesar , Baldo Edgardo G. , Larrovere Mariano A. , Lembo Wuest Carlos I. , Benítez Manuela E. , Ramacciotti Carlos D. , Murra Juan A. , Pankhurst Robert J.
Published: March 2023

This paper focuses on one orogenic belt that formed during the Rinconada phase on the final stage of the Famatinian orogeny, between 445 and 410 Ma, which is well exposed at Sierra de Ramaditas and neighbouring ranges in western Argentina. The Ramaditas Complex is formed by metasedimentary and meta-ultrabasic rocks and amphibolites. This complex forms the upper nappe of a thrust stack resulting from westward thrusting. Deformation consists of an early high-temperature S1 foliation (stromatic migmatites), coeval with thrusting and metamorphism. Metamorphism attained peak P–T conditions of 6.0–6.9 kbar and 795–810 °C, at c. 440 Ma, i.e. coincident with the Rinconada orogenic phase. The lower unit and intermediate nappes crop out in the nearby sierras of Maz and Espinal and underwent low- to medium-grade Silurian metamorphism, respectively, together with the upper nappe, defining an inverted Barrovian-type metamorphism with T decreasing and P increasing downwards across the thrust stack (i.e. westward). We argue that the Rinconada orogenic phase developed near the continental margin of SW Gondwana, during a magmatic lull following accretion of the Precordillera terrane to the continental margin at c. 470 Ma. The active margin jumped to the west after accretion, and flat-slab subduction resumed in the early Silurian, provoking thrusting and imbrication of nappe stack under the still hot root (800–900 °C) of the older Famatinian magmatic arc. This ‘hot-iron’ process explains both the inverted Barrovian-type metamorphism and the missing overburden of 21 to 24 km implied by the P estimate.
Condition-invariant and compact visual place description by convolutional autoencoder
Authors: Ye Hanjing , Chen Weinan , Yu Jingwen , He Li , Guan Yisheng , Zhang Hong
Published: March 2023

Visual place recognition (VPR) in condition-varying environments is still an open problem. Popular solutions are convolutional neural network (CNN)-based image descriptors, which have been shown to outperform traditional image descriptors based on hand-crafted visual features. However, there are two drawbacks of current CNN-based descriptors: (a) their high dimension and (b) lack of generalization, leading to low efficiency and poor performance in real robotic applications. In this paper, we propose to use a convolutional autoencoder (CAE) to tackle this problem. We employ a high-level layer of a pre-trained CNN to generate features and train a CAE to map the features to a low-dimensional space to improve the condition invariance property of the descriptor and reduce its dimension at the same time. We verify our method in four challenging real-world datasets involving significant illumination changes, and our method is shown to be superior to the state-of-the-art. The code of our work is publicly available at https://github.com/MedlarTea/CAE-VPR.
Care Scales:DibaoAllowances, State and Family in China
Authors: Lammer Christof
Published: March 2023

Examining the “world's largest cash-based social policy” through the lens of care reveals widely shared scalar imaginaries and the productivity of care in constituting scale. In standardizing the minimum livelihood guarantee (dibao), officials, applicants and researchers in rural Sichuan cited both “too much” and “not enough” care at the scale of the family in recommending or rejecting state assistance. Different levels of organization (scale1) were not stable bases with specific sizes and qualities (scale2) that enabled or limited care.Dibao-related practices were evaluated as an appropriate (“filial piety”), insufficient (“individualism”) or excessive (“corruption”) amount of family care. Care became an indicator of kinship measurements and a marker of state boundaries. Thus, scale (in both meanings) was enacted in China, as elsewhere, through negotiations of needs and responsibilities, through evaluations of care practices and their outcomes. In this sense, care scales.
Household food insecurity is prevalent in a cohort of postpartum women who registered in the Canada Prenatal Nutrition Program in Toronto
Authors: Mildon Alison , Francis Jane , Stewart Stacia , Underhill Bronwyn , Ng Yi Man , Rousseau Christina , Tarasuk Valerie , Di Ruggiero Erica , Dennis Cindy-Lee , O’Connor Deborah L , Sellen Daniel W
Published: March 2023

Objective:

To assess the prevalence, severity and socio-demographic predictors of household food insecurity among vulnerable women accessing the Canada Prenatal Nutrition Program (CPNP) and to examine associations between household food insecurity and breastfeeding practices to 6 months.

Design:

Cohort investigation pooling data from two studies which administered the 18-item Household Food Security Survey Module at 6 months postpartum and collected prospective infant feeding data at 2 weeks and 2, 4 and 6 months. Household food insecurity was classified as none, marginal, moderate or severe. Logistic regression analyses were performed to assess predictors of household food insecurity and associations between household food security (any and severity) and continued and exclusive breastfeeding.

Setting:

Three Toronto sites of the CPNP, a federal initiative targeting socially and/or economically vulnerable women.

Participants:

316 birth mothers registered prenatally in the CPNP from 2017 to 2020.

Results:

Household food insecurity at 6 months postpartum was highly prevalent (44 %), including 11 % in the severe category. Risk of household food insecurity varied by CPNP site (P< 0·001) and was higher among multiparous participants (OR 2·08; 95 % CI 1·28, 3·39). There was no association between the prevalence or severity of food insecurity and continued or exclusive breastfeeding to 6 months postpartum in the adjusted analyses.

Conclusions:

Household food insecurity affected nearly half of this cohort of women accessing the CPNP. Further research is needed on household food insecurity across the national CPNP and other similar programmes, with consideration of the implications for programme design, service delivery and policy responses.
Descriptive Presentation: Invoking Identity as a Claim for Descriptive Representation
Authors: Funk Kendall D. , Hinojosa Magda
Published: March 2023

Descriptive representation is commonly understood as the proportion of women or racial minorities in an institution. While useful, this approach is limited in its ability to capture intersectional identities, less visible characteristics, and the extent to which particular characteristics are more or less central to one’s identity. Traditional approaches have raised concerns about essentialism—“the assumption that members of certain groups have an essential identity that all members of that group share” (Mansbridge 1999, 637). This assumption can lead to faulty logic—for example, that any woman can represent all women. Traditional approaches have also focused on visible characteristics, rather than shared experiences. These limitations affect not only who counts as a descriptive representative, but also our ability to assess which descriptive representatives will be most likely to contribute to substantive and symbolic representation.
Genistein supplementation has no effects on vitamin D levels in healthy Spanish postmenopausal women
Authors: Pérez-Alonso María , Calero-Paniagua Ismael , Usategui-Martin Ricardo , Briongos Laisa-Socorro , Ruiz-Mambrilla Marta , Olmos José-Manuel , González-Sagrado Manuel , De Luis Daniel , Dueñas-Laita Antonio , Pérez-Castrillón José-Luis
Published: March 2023

Abstract: Background: In vitro studies have shown that genistein inhibits the CYP240 enzyme, which is involved in the degradation of 1,25-dihydroxycholecalciferol and its precursor 25-hydroxycholecalciferol, and increases their plasma levels. However, no clinical studies have primarily assessed the synergistic effect of isoflavones on vitamin D levels. The aim of this study was to evaluate the possible additive effect of genistein supplementation on vitamin D levels, calcium metabolism and bone remodeling markers in healthy postmenopausal women during the spring-summer months. Patients and methods: We made a prospective, double-blind study with 150 healthy postmenopausal women that were randomized to three groups. One received placebo, another received calcium (1000 mg/day) and vitamin D (cholecalciferol, 800 U/day) and the third received calcium (1000 mg/day), vitamin D (cholecalciferol, 800 U/day) and genistein (90 mg/day). The study period was from May to September (spring-summer). Vitamin D, PTH, CTX and P1NP were determined by electrochemiluminescence at baseline and after 12 weeks. Results: Vitamin D levels increased in all groups: placebo (23±9 ng/ml vs. 29±10 ng/ml, p<0.05), calcium+vitamin D (26±10 ng/ml vs. 33±8 ng/ml, p<0.05) and calcium+vitamin D+genistein (24±9 ng/ml vs. 31±8 ng/l, p<0.05) without between-group differences. At study end, the percentage of women with vitamin D <20 ng/ml (11%) and <30 ng/ml (39%) had fallen without between-group differences. The effects on calcium metabolism and bone remodeling markers were similar between groups: rises in vitamin D were significantly linked to reductions in PTH, CTX and P1NP. Conclusion: Adding genistein to supplementation with calcium and vitamin D provided not additional changes in vitamin D levels, calcium metabolism or bone remodeling markers in healthy Spanish postmenopausal women during the spring-summer months.
Dimensionality and Validation of the Highly Sensitive Person Scale (HSPS) in a Dutch General Population Sample and Two Clinical Samples
Authors: De Gucht Véronique , Wilderjans Tom F. , Garcia Franshelis K. , Maes Stan
Published: March 2023

Abstract: Previous studies on the Highly Sensitive Person Scale (HSPS) were primarily conducted in highly selective, mostly student populations. The objective of the present study was to examine the factor structure of the Dutch HSPS in the general population ( n = 998), prolonged fatigue ( n = 340), and chronic pain samples ( n = 283), and investigate its psychometric properties. The factorial structure of the HSPS was assessed by an exploratory factor analysis, followed by a confirmatory factor analysis. To this end, the overall sample consisting of 1,621 subjects was randomly split into two subsamples. The factor structure was subsequently confirmed in the general population, fatigue, and chronic pain samples separately. A bi-factor model, consisting of a general factor and three separate factors, provided the best fit to the data in each sample. The three separate factors, capturing different dimensions of sensory processing sensitivity, were labeled “Ease of Excitation” (11 items), “Sensory and Aesthetic Sensitivity” (5 items), and “Low Sensory Threshold” (5 items). Internal consistency was satisfactory. Distinct patterns of associations were found between these factors and (un)related personality constructs.
Influence of Grain‐Scale Properties on Localization Patterns and Slip Weakening Within Dense Granular Fault Gouges
Authors: Casas N. , Mollon G. , Daouadji A.
Published: March 2023

Fault zones are usually composed of a granular gouge, coming from the wear material of previous slips, which contributes to friction stability. When considering a mature enough fault zone that has already been sheared, different types of infill materials can be observed, from mineral cementation to matrix particles that can fill the remaining pore spaces between clasts and change the rheological and frictional behaviors of the gouge. We aim to understand and reproduce the influence of grain‐scale characteristics on slip mechanisms and gouge rheology (Riedel bands) by employing the discrete element method. A 2D‐direct shear model is considered with a dense assembly of small polygonal cells of matrix particles. A variation of gouge characteristics such as interparticle friction, gouge shear modulus or the number of particles within the gouge thickness leads to different Riedel shear band formation and orientation that has been identified as an indicator of a change in slip stability. Interpreting results with slip weakening theory, our simulated gouge materials with high interparticle friction or a high bulk shear modulus, increase the possible occurrence of dynamic slip instabilities (small nucleation length and high breakdown energy). They may give rise to faster earthquake ruptures.
The Occurrence of Near‐0°C Surface Air Temperatures in the Current and Pseudo‐Global Warming Future Over Southern Canada
Authors: Stewart R. E. , Liu Z. , Thériault J. M. , Ruman C. J.
Published: March 2023

Temperatures near 0°C represent a critical threshold for many environmental processes and socio‐economic activities. This study examines surface air temperatures (T) near 0°C (−2°C ≤ T ≤ 2°C) across much of southern Canada over a 13 year period (October 2000–September 2013). It utilized hourly data from 39 weather stations and from 4‐km resolution Weather Research and Forecasting model simulations that were both a retrospective simulation as well as a pseudo‐global warming simulation applicable near the end of the 21st century. Average annual occurrences of near‐0°C conditions increase by a relatively small amount of 5.1% from 985 hr in the current climate to 1,035 hr within the future one. Near‐0°C occurrences with precipitation vary from <5% to approximately 50% of these values. Near‐0°C occurrences are sometimes higher than values of neighboring temperatures. These near‐0°C peaks in temperature distributions can occur in both the current and future climate, in only one, or in neither. Only 4.3% of southern Canada is not associated with a near‐0°C peak and 65.8% is associated with a near‐0°C peak in both climates. It is inferred that latent heat exchanges from the melting and freezing of, for example, precipitation and the snowpack contribute significantly to some of these findings.
Improved Performance of CLM5.0 Model in Frozen Soil Simulation Over Tibetan Plateau by Implementing the Vegetation Emissivity and Gravel Hydrothermal Schemes
Authors: Luo Jiangxin , Huang Anning , Lyu Shihua , Lin Zhaohui , Gu Chunlei , Li Zhaoguo , Deng Mingshan , Zhao Wen , Liu Wanqing
Published: March 2023

Frozen soil is widely distributed over the Tibetan Plateau (TP) and has significant impacts on the regional climate and ecosystem. However, the Community Land Model version 5 (CLM5.0) produces evident cold bias in the frozen soil simulation over TP. In this study, an improved vegetation emissivity scheme and a gravel hydrothermal scheme have been implemented into CLM5.0 model, and their synergistic influences on the frozen soil simulation over TP have been systematically addressed and revealed. Results show that adopting the vegetation emissivity scheme, the gravel hydrothermal scheme, and both can remarkably reduce the cold bias in the frozen soil simulated by the original CLM5.0 model, and the column mean root‐mean‐square error (RMSE) can be reduced by 12.88%, 20.68%, and 31.11% at Arou site and 25.03%, 10.15%, and 36.87% at Maqu site, respectively. The reductions of column mean RMSE for the modeled soil temperature regionally averaged over TP induced by the adoption of vegetation emissivity scheme, the gravel hydrothermal scheme, and both are 32.34%, 6.75%, and 30.18%, respectively. The underlying physical mechanisms are related to the improved representation of the soil hydrothermal processes above or in the soil. The improved vegetation emissivity scheme improves the soil surface long‐wave radiation heat transfer process, while the gravel hydrothermal scheme improves the hydrothermal properties within the soil. Overall, improving the surface long‐wave radiation heat transfer and the internal soil hydrothermal properties can obviously enhance the performance of CLM5.0 model in simulating the soil freeze–thaw processes.
Metabolism Modeling in Rivers With Unsteady Flow Conditions and Transient Storage Zones
Authors: Pathak Devanshi , Demars Benoît O. L.
Published: March 2023

Whole‐stream metabolism characterizes energy and carbon transformations, thus providing an estimate of the food base and CO2 emission sources from streams and rivers. Metabolism models are generally implemented with a steady flow assumption that does not hold true for many systems with sub‐daily flow variation, such as river sections downstream of dams. The steady flow assumption has confined metabolism estimation to a limited range of river environments, thus limiting our understanding about the influence of hydrology on biological production in rivers. Therefore, we couple a flow routing model with the two‐station stream metabolism model to estimate metabolism under unsteady flow conditions in rivers. The model's applicability is further extended by including advection‐dispersion processes to facilitate metabolism estimation in transient storage zones. Metabolism is estimated using two approaches: (a) an accounting approach similar to the conventional two‐station method and (b) an inverse approach that estimates metabolism parameters using least squares minimization method. Both approaches are complementary since we use outputs of the accounting approach to constrain the inverse model parameters. The model application is demonstrated using a case study of an 11 km long stretch downstream of a hydropower plant in the River Otra in southern Norway. We present and test different formulations of the model to show that users can make an appropriate selection that best represents hydrology and solute transport mechanism in the river system of interest. The inclusion of unsteady flows and transient storage zones in the model unlocks new possibilities for studying metabolism controls in altered river ecosystems.
Examining the Economic Costs of the 2003 Halloween Storm Effects on the North Hemisphere Aviation Using Flight Data in 2019
Authors: Xue Dabin , Yang Jian , Liu Zhizhao , Yu Shiwei
Published: March 2023

Space weather can impede normal aviation operations through communication blackouts, GNSS‐based navigation and surveillance failures, and elevated cosmic radiation, consequently resulting in necessary flight plan adjustments and considerable economic costs. Although space weather effects have been heavily emphasized, the literature on the economic effects on aviation is limited. In this study, we estimate the economic impacts from the perspective of air traffic management, assuming an extremely strong space weather event like the 2003 Halloween solar storm would occur in 2019 with a booming air transport industry in recent years. We find that (a) as the high‐frequency communication blackouts may lead to polar flight rerouting and cancellations, possible daily economic costs could range from €0.21 million to €2.20 million per day; (b) during the satellite navigation failure period in the continental United States, as aircraft utilizes ground navigation aids as a backup, the increased flying time and disrupted descent approach operations may lead to additional cost of €2.43 million; (c) a surveillance failure can reduce airspace capacity and increase the workload of air traffic controllers, resulting in fatigue and perhaps risking flight safety; (d) to prevent massive cosmic radiation exposure, the economic costs of flight cancellations can be from €2.77 million to €48.97 million, depending on the cosmic radiation dose limits for a given plan. Our study indicates that severe space weather events may briefly disrupt normal aviation operations and cause substantial economic losses if future aviation equipment and technology are fragile to its effects.