bluuebunny/crossref_metadata_2025 huggingface dataset:
Review of PPP–RTK: achievements, challenges, and opportunities
Authors: Li Xingxing , Huang Jiaxin , Li Xin , Shen Zhiheng , Han Junjie , Li Linyang , Wang Bo
Published: December 2022

The PPP–RTK method, which combines the concepts of Precise of Point Positioning (PPP) and Real-Time Kinematic (RTK), is proposed to provide a centimeter-accuracy positioning service for an unlimited number of users. Recently, the PPP–RTK technique is becoming a promising tool for emerging applications such as autonomous vehicles and unmanned logistics as it has several advantages including high precision, full flexibility, and good privacy. This paper gives a detailed review of PPP–RTK focusing on its implementation methods, recent achievements as well as challenges and opportunities. Firstly, the fundamental approach to implement PPP–RTK is described and an overview of the research on key techniques, such as Uncalibrated Phase Delay (UPD) estimation, precise atmospheric correction retrieval and modeling, and fast PPP ambiguity resolution, is given. Then, the recent efforts and progress are addressed, such as improving the performance of PPP–RTK by combining multi-GNSS and multi-frequency observations, single-frequency PPP–RTK for low-cost devices, and PPP–RTK for vehicle navigation. Also, the system construction and applications based on the PPP–RTK method are summarized. Moreover, the main issues that impact PPP–RTK performance are highlighted, including signal occlusion in complex urban areas and atmosphere modeling in extreme weather events. The new opportunities brought by the rapid development of low-cost markets, multiple sensors, and new-generation Low Earth Orbit (LEO) navigation constellation are also discussed. Finally, the paper concludes with some comments and the prospects for future research.
Altered diffusion tensor imaging (DTI) parameters in brain parenchyma after traumatic brain injury
Authors: Elsorogy Lamiaa Galal , Abdelrazek Amany Mohamed , Awad Hanee Ali , Abdelwahab Rihame Mohamed
Published: December 2022

Aim of study

To evaluate the role of diffuse tensor imaging (DTI) in detecting structural alterations following TBI with persistent symptoms without findings on conventional structural imaging.

Methods

This was a prospective study that enrolled a total of 30 individuals (12 females and 18 males), 6 control with no history of trauma and 24 with previous history of trauma. All subjects underwent conventional brain MRI and DTI. The eigenvalues of the genue and splenium of corpus callosum (CC), superior longitudinal fasciculus (SLF), inferior longitudinal fasciculus (ILF), corticospinal tract (CS), arcuate fasciculus (AF) were measured bilaterally in all cases using suitable region of interest and the fraction anisotropy (FA), mean diffusivity (MD), were calculated. FA and MD values were compared between patients and control subjects. Diagnostic accuracy was calculated for FA, MD and combined. Sensitivity and Specificity were determined from the curve and PPV, NPV and accuracy underwent calculation through cross-tabulation.

Result

As compared with controls, FA was significantly decreased and MD was significantly increased in genue and splenium of CC and CS. For the Combined FA & MD in differentiating cases with trauma there was statistically significant difference in SLF, AF, genue, splenium, ILF and CS as p value < 0.05.

Conclusions

DTI parameters is a promising tool in the detection of subtle brain parenchymal changes in patients with TBI who have persistent symptoms and no evident abnormalities on conventional MRI. Furthermore combined use of FA and MD shows better diagnostic accuracy in differentiation between control and trauma patient.
Vertical wound closure following sacrococcygeal teratoma excision: an approachable aesthetic solution
Authors: AbouZeid Amr Abdelhamid , Radwan Ahmed Bassiouny , Elghandour Mostafa Mohamed , Guirguis Nader Nassef , Bersy Mohamed Ali
Published: December 2022

Background

Sacrococcygeal teratoma is a rare tumour, usually presenting in the neonatal period. The benign nature of most tumours and the high survival rates would emphasise on the importance of both cosmetic and functional outcomes.

We report on our extended experience with more cases concentrating on the aesthetic outcome of vertical wound closure following excision of large irregular sacrococcygeal tumours.

The study included primary cases of sacrococcygeal teratoma who were referred to our surgical team for excision. Cases of presacral tumours associated with anorectal anomalies and sacral bony defects (Currarino triad) were excluded. In all cases, we planned for a vertical midline wound closure after tumour excision. The aesthetic outcomes are evaluated concerning the vertical midline scar, buttock’s contour, and position of the anus.

Results

In addition to twelve previously reported cases (during the period 2011 through 2016), we included another ten new consecutive cases operated during the period 2017 through 2021. Collectively, the study included 22 cases of sacrococcygeal teratoma that underwent vertical perineal wound closure after excision of the tumour. In 13 cases (those with relatively small or medium-sized tumours), the perineal wound was perfectly closed in the midline (well-hidden vertical scar in the natal cleft). For the rest of the cases (9 cases with large and/or irregular sacrococcygeal tumours), some modification was applied on the vertical linear mid-line skin closure to accommodate for skin redundancy and irregularity at the lower end of the wound, usually ending with an ‘inverted-Y’ skin closure

Conclusion

Vertical wound closure was always feasible after excision of sacrococcygeal teratomas. Even with large and irregular tumours, the vertical scar was perfectly or partially hidden within the natal cleft. Usually, there was adequate buttock development with minimal disturbance to the normal anal location within the perineum.
The incidence and clinical characteristics of pulmonary embolism in oncologic patients
Authors: Samra Saad Rabie , Said Ahmed Mohamed , Elsayed Dalia Hamouda , Elhamed Marwa Elsayed Abd , HAbeb Mohamed A.
Published: December 2022

Background

For various types of cancer in oncologic patients, the clinical features of pulmonary embolism (PE) are unknown. The purpose of the study is to identify pulmonary embolism incidence and type among oncologic patients along with evaluating any associated clinical variables.

Patients and methods

A prospective cohort study was conducted on 540 patients who had various types of cancers and attended to a 1-day care unit of oncology in King Fahd Hospital, Kingdom of Saudi Arabia. Chest CT with contrast and CT pulmonary angiography was applied when indicated.

Results

This study was conducted on 540 patients who have different types of cancers; among them, 24 (4.44%) developed PE. Pulmonary embolism was reported in 50% of patients who had seminoma and germ cell tumor, while in cancer larynx, it was represented in 33.4% of them. Moreover, PE was less common among patients who had cancer colon, prostate, and breast (6.68%, 4.7%, and 2.54%, respectively). Seven patients with PE (1.3%) were diagnosed incidentally during cancer staging, while 17 patients (3.14%) had symptomatic PE. Eighty-four percent of the PE cases were diagnosed within the first 6 months of cancer diagnosis, while 4/24 (16%) of the PE cases were diagnosed throughout patient follow-up within the first year of diagnosis. Chest pain and dyspnea were the common presentations in confirmed PE either symptomatic or incidental group.

Conclusions

Low-risk PE was the most frequent degree; massive and sub-massive PE was uncommon in oncologic patients. Dyspnea and chest discomfort are concerning signs of PE in cancer. Meticulous care during the first 6 months for cancer patients to pick up pulmonary embolism is recommended.
Integrating Tobacco Treatment Into Oncology Care: Reach and Effectiveness of Evidence-Based Tobacco Treatment Across National Cancer Institute–Designated Cancer Centers
Authors: Hohl Sarah D. , Matulewicz Richard S. , Salloum Ramzi G. , Ostroff Jamie S. , Baker Timothy B. , Schnoll Robert , Warren Graham , Bernstein Steven L. , Minion Mara , Lenhoff Katie , Dahl Neely , Juon Hee Soon , Tsosie Ursula , Fleisher Linda , D'Angelo Heather , Ramsey Alex T. , Ashing Kimlin T. , Rolland Betsy , Nolan Margaret B. , Bird Jennifer E. , Nguyen Claire V.T. , Pauk Danielle , Adsit Robert T. , Tindle Hilary A. , Shoenbill Kimberly , Yeung Sophia , Presant Cary A. , Wiseman Kara P. , Wen Kuang-Yi , Chichester Lou-Anne , Chen Li-Shiun
Published: December 2022

PURPOSE

Quitting smoking improves patients' clinical outcomes, yet smoking is not commonly addressed as part of cancer care. The Cancer Center Cessation Initiative (C3I) supports National Cancer Institute–designated cancer centers to integrate tobacco treatment programs (TTPs) into routine cancer care. C3I centers vary in size, implementation strategies used, and treatment approaches. We examined associations of these contextual factors with treatment reach and smoking cessation effectiveness.

METHODS

This cross-sectional study used survey data from 28 C3I centers that reported tobacco treatment data during the first 6 months of 2021. Primary outcomes of interest were treatment reach (reach)—the proportion of patients identified as currently smoking who received at least one evidence-based tobacco treatment component (eg, counseling and pharmacotherapy)—and smoking cessation effectiveness (effectiveness)—the proportion of patients reporting 7-day point prevalence abstinence at 6-month follow-up. Center-level differences in reach and effectiveness were examined by center characteristics, implementation strategies, and tobacco treatment components.

RESULTS

Of the total 692,662 unique patients seen, 44,437 reported current smoking. Across centers, a median of 96% of patients were screened for tobacco use, median smoking prevalence was 7.4%, median reach was 15.4%, and median effectiveness was 18.4%. Center-level characteristics associated with higher reach included higher smoking prevalence, use of center-wide TTP, and lower patient-to-tobacco treatment specialist ratio. Higher effectiveness was observed at centers that served a larger overall population and population of patients who smoke, reported a higher smoking prevalence, and/or offered electronic health record referrals via a closed-loop system.

CONCLUSION

Whole-center TTP implementation among inpatients and outpatients, and increasing staff-to-patient ratios may improve TTP reach. Designating personnel with tobacco treatment expertise and resources to increase tobacco treatment dose or intensity may improve smoking cessation effectiveness.
Clinical Benefit of First-Line Programmed Death-1 Antibody Plus Chemotherapy in Low Programmed Cell Death Ligand 1–Expressing Esophageal Squamous Cell Carcinoma: A Post Hoc Analysis of JUPITER-06 and Meta-Analysis
Authors: Wu Hao-Xiang , Pan Yi-Qian , He Ye , Wang Zi-Xian , Guan Wen-Long , Chen Yan-Xing , Yao Yi-Chen , Shao Ning-Yi , Xu Rui-Hua , Wang Feng
Published: December 2022

PURPOSE

Pembrolizumab or nivolumab plus chemotherapy was approved as a first-line treatment for high programmed cell death ligand 1 (PD-L1)–expressing esophageal squamous cell carcinoma (ESCC) by the European Medicines Agency, whereas the US Food and Drug Administration approved this regimen regardless of PD-L1 expression. The superiority of programmed death-1 (PD-1) antibody plus chemotherapy over chemotherapy alone in patients with low PD-L1–expressing ESCC remains debatable.

METHODS

Post hoc analysis of the Chinese JUPITER-06 study focusing on efficacy stratified by PD-L1 tumor proportion score (TPS; using JS311 antibody) was conducted. Electronic databases were searched to identify eligible randomized controlled trials for meta-analysis. Study-level pooled analyses of hazard ratios (HRs) for overall survival and progression-free survival and odds ratios for objective response rate according to PD-L1 expression were performed.

RESULTS

The post hoc analysis of JUPITER-06 showed more prominent clinical benefit with PD-1 antibody plus chemotherapy than with chemotherapy alone in both the high and low PD-L1–expressing subgroups. Five randomized controlled trials were included in the meta-analysis, and two PD-L1 expression scoring criteria, TPS (≥ 1%/< 1%) and combined positive score (CPS, ≥ 10/< 10), were analyzed. Significant overall survival benefit by adding PD-1 antibody to chemotherapy was observed in both the TPS < 1% (HR, 0.74; 95% CI, 0.56 to 0.97) and CPS < 10 (HR, 0.77; 95% CI, 0.66 to 0.89) subgroups. Similarly, significantly prolonged progression-free survival was observed in both the TPS < 1% (HR, 0.66; 95% CI, 0.50 to 0.86) and CPS < 10 (HR, 0.63; 95% CI, 0.47 to 0.84) subgroups. In addition, the objective response rate of the TPS < 1% subgroup was significantly improved (odds ratio, 1.71; 95% CI, 1.27 to 2.29). In all high PD-L1–expressing subgroups, the pooled benefit of PD-1 antibody plus chemotherapy was significantly better than that of chemotherapy.

CONCLUSION

This study provided novel evidence supporting the superiority of PD-1 antibody plus chemotherapy to chemotherapy alone in patients with advanced ESCC with low PD-L1 expression. Further studies of predictive biomarkers are warranted.
Clinical Multiteam System Composition and Complexity Among Newly Diagnosed Early-Stage Breast, Colorectal, and Lung Cancer Patients With Multiple Chronic Conditions: A SEER-Medicare Analysis
Authors: Doose Michelle , Verhoeven Dana , Sanchez Janeth I. , McGee-Avila Jennifer K. , Chollette Veronica , Weaver Sallie J.
Published: December 2022

PURPOSE:

Sixty percent of adults have multiple chronic conditions at cancer diagnosis. These patients may require a multidisciplinary clinical team-of-teams, or a multiteam system (MTS), of high-complexity involving multiple specialists and primary care, who, ideally, coordinate clinical responsibilities, share information, and align clinical decisions to ensure comprehensive care needs are managed. However, insights examining MTS composition and complexity among individuals with cancer and comorbidities at diagnosis using US population-level data are limited.

METHODS:

Using SEER-Medicare data (2006-2016), we identified newly diagnosed patients with breast, colorectal, or lung cancer who had a codiagnosis of cardiopulmonary disease and/or diabetes (n = 75,201). Zaccaro's theory-based classification of MTSs was used to categorize clinical MTS complexity in the 4 months following cancer diagnosis: high-complexity (≥ 4 clinicians from ≥ 2 specialties) and low-complexity (1-3 clinicians from 1-2 specialties). We describe the proportions of patients with different MTS compositions and quantify the incidence of high-complexity MTS care by patient groups.

RESULTS:

The most common MTS composition was oncology with primary care (37%). Half (50.3%) received high-complexity MTS care. The incidence of high-complexity MTS care for non-Hispanic Black and Hispanic patients with cancer was 6.7% (95% CI, −8.0 to −5.3) and 4.7% (95% CI, −6.3 to −3.0) lower than non-Hispanic White patients with cancer; 13.1% (95% CI, −14.1 to −12.2) lower for rural residents compared with urban; 10.4% (95% CI, −11.2 to −9.5) lower for dual Medicaid-Medicare beneficiaries compared with Medicare-only; and 16.6% (95% CI, −17.5 to −15.8) lower for colorectal compared with breast cancer.

CONCLUSION:

Incidence differences of high-complexity MTS care were observed among cancer patients with multiple chronic conditions from underserved populations. The results highlight the need to further understand the effects of and mechanisms through which care team composition, complexity, and functioning affect care quality and outcomes.
Oncologist-Reported Barriers and Facilitators to Enrolling Patients in Optimization Trials That Test Less Intense Cancer Treatment
Authors: Rocque Gabrielle B. , Andrews Courtney , Lawhon Valerie M. , Frazier Rachel , Ingram Stacey A. , Smith Mary Lou , Wagner Lynne I. , Zubkoff Lisa , Tung Nadine , Wallner Lauren P. , Wolff Antonio C.
Published: December 2022

PURPOSE:

As outcomes improve in early-stage breast cancer, clinical trials are undergoing a paradigm shift from intensification trials (more therapy) to improve survival to optimization trials, which assess the potential for using less toxic therapy while preserving survival outcomes. However, little is known about physician perspectives in community and academic settings about possible barriers and facilitators that could affect accrual to optimization clinical trials and the generalizability of future findings.

METHODS:

We conducted a qualitative study with semistructured interviews of medical oncologists from different academic and community practices to assess their perspectives on optimization trials. Interviews were audio-recorded and transcribed. Three independent coders used a content analysis approach to analyze transcripts using NVivo. Major themes and exemplary quotes were extracted.

RESULTS:

All 39 physicians reported that they would enroll patients in optimization clinical trials. Oncologists highlighted specific reasons to consider optimization trials. These included quality-of-life improvement by reducing toxicity, reduction in financial toxicity, fertility preservation, ability to avoid chemotherapy, minimization of overtreatment in patients with comorbid conditions, personalized treatment, opportunities to test novel therapies, and leveraging the availability of targeted therapies. Oncologists also identified accrual barriers, such as tumor-specific biology, individual (host) factors, prognostic markers of risk, access to therapies, provider experience, and system constraints. They voiced recommendations regarding preliminary data, trial design, and tools to support enrollment in optimization trials.

CONCLUSION:

Although oncologists are generally willing to enroll patients on optimization clinical trials, barriers affect their acceptance. A scientific focus on overcoming these barriers is needed to support future enrollment on trials tailoring therapy on the basis of risk and potential benefit to allow true personalization of treatment.
Mädchen mit den Perlen
Authors: Benz Marion , Hodel Corinne , Lassau Guido
Published: December 2022

Bei den Bauarbeiten für den Ausbau des Fernwärmenetzes in den Quartieren rund um den Wettsteinplatz kamen mehrere frühmittelalterliche Gräber, darunter ein reich ausgestattetes Mädchengrab, zum Vorschein.
Das Grab enthielt ca. 380 Perlen, eine Schnalle – vermutlich für ein Täschchen – und eine goldtauschierte Gürtelschnalle. Ein solches Ensemble kannte man bisher nur aus sehr reichen Frauengräbern. Der Kantonsarchäologe Guido Lassau und die Grabungsleiterin Corinne Hodel sprechen mit der Wissenschaftsjournalistin Marion Benz über Herausforderungen und Potentiale der Grossgrabungen für die Fernwärmeleitung, über die vielfältigen Informationen, welche das reich geschmückte Mädchen für die archäologische Forschung liefert, und wie wichtig es ist, ihr Lebensumfeld genauer zu kennen, um ihre Rolle in der damaligen Gesellschaft zu verstehen.
Gefässkeramik aus Basel (Katalog)
Authors: Keller Christine
Published: December 2022

Katalog, Tafeln und Konkordanzliste 
Band A: Text
Band B: Katalog
Mental health status of women in reproductive age group and its determinants in rural Odisha, India using GHQ 12 questionnaire
Authors: Kar Sonali , Samantaray Pramod
Published: December 2022

Background: The study was conceived with support from the Department of Health Research (DHR), India to use the General Health Questionnaire-12 (GHQ-12), to screen women in the reproductive age group, stratified for pregnant, lactating, and nonpregnant and non-lactate women (NPNL), for their mental health status and examine it with their social background to understand the influences around their mental health.  

Methods: By multistage sampling, subcenters were selected from 6 districts; women in the 3 groups were selected proportionately in each district, and data was collected on the basis of a pre-tested, pre-designed questionnaire along with the GHQ-12.  

Results: Results showed GHQ-12 scores across the 3 categories of women are nearly the same with no significant difference (p=0.91). The higher GHQ (scores >11 to 36) were also noted to be equal for pregnant and lactating women i.e. 41.4% and mildly less for NPNL women 40.7%, reaffirming that pregnancy and the postnatal period add more stress to the woman’s life. Age of the women, age at marriage, hemoglobin levels, and poor Iron Folic Acid (IFA) intake were common predictors for poor mental health in all the 3 strata. 

Conclusions: The study suggests that psychological stressors are cross-sectionally present in all three groups of women in the reproductive age group and all three strata need equal focus. Above 40% distress in mental health in women in all strata of the reproductive age group (ie pregnant women, post-natal women, and women not pregnant or lactating) is appalling, contrary to the general opinion that post-natal women alone face mental health compromise. Hence, the life cycle approach is recommended for best results.
Community review: a robust and scalable selection system for resource allocation within open science and innovation communities
Authors: Graham Chris L.B. , Landrain Thomas E. , Vjestica Amber , Masselot Camille , Lawton Elliot , Blondel Leo , Haenal Luca , Greshake Tzovaras Bastian , Santolini Marc
Published: December 2022

Resource allocation is essential to selection and implementation of innovative projects in science and technology. Current “winner-take-all” models for grant applications require significant researcher time in writing extensive project proposals, and rely on the availability of a few time-saturated volunteer experts. Such processes usually carry over several months, resulting in high effective costs compared to expected benefits. We devised an agile “community review” system to allocate micro-grants for the fast prototyping of innovative solutions. Here we describe and evaluate the implementation of this community review across 147 projects from the “Just One Giant Lab’s OpenCOVID19 initiative” and “Helpful Engineering” open research communities. The community review process uses granular review forms and requires the participation of grant applicants in the review process. Within a year, we organised 7 rounds of review, resulting in 614 reviews from 201 reviewers, and the attribution of 48 micro-grants of up to 4,000 euros. The system is fast, with a median process duration of 10 days, scalable, with a median of 4 reviewers per project independent of the total number of projects, and fair, with project rankings highly preserved after the synthetic removal of reviewers. Regarding potential bias introduced by involving applicants in the process, we find that review scores from both applicants and non-applicants have a similar correlation of r=0.28 with other reviews within a project, matching traditional approaches. Finally, we find that the ability of projects to apply to several rounds allows to foster the further implementation of successful early prototypes, as well as provide a pathway to constructively improve an initially failing proposal in an agile manner. Overall, this study quantitatively highlights the benefits of a frugal, community review system acting as a due diligence for rapid and agile resource allocation in open research and innovation programs, with implications for decentralised communities.
The odd log-logistic generalized exponential distribution: Application on survival times of chemotherapy patients data
Authors: Fulment Arnold K. , Gadde Srinivasa Rao , Peter Josephat K.
Published: December 2022

Background: The creation of developing new generalized classes of distributions has attracted applied and theoretical statisticians owing to their properties of flexibility. The development of generalized distribution aims to find distribution flexibility and suitability for available data. In this decade, most authors have developed classes of distributions that are new, to become valuable for applied researchers.

Methods: This study aims to develop the odd log-logistic generalized exponential distribution (OLLGED), one of the lifetime newly generated distributions in the field of statistics. The advantage of the newly generated distribution is the heavily tailed distributed lifetime data set. Most of the probabilistic properties are derived including generating functions, moments, and quantile and order statistics.

Results: Estimation of the model parameter is done by the maximum likelihood method. The performance of parametric estimation is studied through simulation. Application of OLLGED and its flexibilities is done using two data sets and while its performance is done on the randomly simulated data set.

Conclusions: The application and flexibility of the OLLGED are ensured through empirical observation using two sets of lifetime data, establishing that the proposed OLLGED can provide a better fit in comparison to existing rival models, such as odd generalized log-logistic, type-II generalized log-logistic, exponential distributions, odd exponential log-logistic, generalized exponential, and log-logistic.
Oral manifestations associated with Novel Coronavirus Disease - 2019 (COVID-19): A questionnaire based hypothetical study
Authors: MOHAMMED FARAZ , FAIROZEKHAN ARISHIYA THAPASUM , MOHAMED SHAMAZ , ALMOUMEN SAUD ABDULLAH , BUGSHAN AMR S. , ALMOMEN ZAINAB I. , ALMOMEN AMINAH MOHAMMAD , M SHASHI KIRAN , ALMULHIM KHALID S.
Published: December 2022

Background: Since the Coronavirus disease 2019 (COVID-19) outbreak in 2019, the virus has evolved drastically, presenting with sets of mutations that influence its properties, including transmissibility and antigenicity. The oral mucosa is postulated as probable portal entry and several oral manifestations have been identified, which places dental professionals in a position to recognize probable COVID-19 patients depending on oral signs and symptoms in the initial phases of the disease itself. As co-existing with COVID-19 seems to be a new reality, greater understanding is required regarding early oral signs and symptoms which can be predictors for timely intervention and prevention of complications in COVID-19 patients. The objective of the study is to identify the distinguishing oral signs and symptoms among COVID-19 patients and to establish possible correlation between severity of COVID-19 infection and oral symptoms.

Methods: This study recruited 179 ambulatory, non-hospitalized COVID-19 patients from the Kingdom of Saudi Arabia’s Eastern Province's designated hotels for COVID-19 and home isolated patients from the same region using a convenience sample method. Data was collected by qualified and experienced investigators, including two physicians and three dentists, using a validated comprehensive questionnaire through telephonic interviews with the participants. The X2 was used to assess the categorical variables, and odd's ratio was calculated to determine the strength of the association between general symptoms and oral manifestations.

Results: Oral and nasopharyngeal lesions or conditions like loss of smell and taste, xerostomia, sore throat, and burning sensation were predictors of COVID-19-related systemic symptoms such as cough, fatigue, fever, and nasal congestion were identified to be statistically significant (p<0.05).

Conclusions: The study reveals the occurrence of olfactory or taste dysfunction, dry mouth, sore throat, and burning sensation along with COVID-19 generic symptoms, should be considered as suggestive yet not conclusive indicators of COVID-19.
A comparative wordlist for the languages of The Gran Chaco, South America
Authors: Brid Nicolás , Messineo Cristina , List Johann-Mattis
Published: December 2022

Home to more than twenty indigenous languages belonging to six linguistic families, the Gran Chaco has raised the interest of many linguists from different backgrounds. While some have focused on finding deeper genetic relations between different language groups, others have looked into similarities from the perspective of areal linguistics. In order to contribute to further research of areal and genetic features among these languages, we have compiled a comparative wordlist consisting of translational equivalents for 326 concepts — representing basic and ethnobiological vocabulary — for 26 language varieties. Since the data were standardized in various ways, they can be analyzed both quantitatively and qualitatively. In order to illustrate this in detail, we have carried out an initial computer-assisted analysis of parts of the data by searching for shared lexicosemantic patterns resulting from structural rather than direct borrowings.
Justicia transicional en marcha. Negociación e implementación del Acuerdo de La Habana
Authors: Orozco Abad Iván , Sánchez Gómez Gonzalo
Published: December 2022

Resultado del proyecto de investigación “Estabilización de la paz en Colombia por medio de justicia y verdad”, promovido y agenciado por el Instituto CAPAZ y financiado por el Ministerio Federal de Relaciones Exteriores de Alemania, el libro contextualiza y explica el diseño, los componentes y las funciones pactados en el Punto 5 del Acuerdo Final de La Habana, haciendo hincapié en el Sistema Integral de Verdad, Justicia y Reparación. Con base en este análisis, se presentan recomendaciones tanto para el caso colombiano como para futuras experiencias internacionales de transición.
Executives in Politics
Authors: Babenko Ilona , Fedaseyeu Viktar , Zhang Song
Published: December 2022

We study the involvement of corporate executives in U.S. politics over the last 40 years. First, we document that the share of business politicians in federal elected office increased from 13.3% in 1980% to 22.6% in 2018, with most of the increase occurring over the last two decades. Second, we find that business politicians enjoy an early fundraising advantage over their opponents, both because they are more likely to self-fund their campaigns and because they receive more campaign contributions from their firms. Third, the election of business politicians benefits their industries and firms, which experience positive abnormal stock returns when their executives win political office. We also show that business politicians, once elected, vote for policies that shift the balance of power toward corporate interests. Using close elections for identification, we show that this policy shift cannot be attributed solely to the changes in the underlying preferences of the electorate. Overall, our results indicate that corporate executives have become more involved in U.S. politics and that this involvement has benefited business interests and affected aggregate legislative outcomes.

This paper was accepted by Gustavo Manso, finance.

Funding: The authors thank the Digital Age Management Research Area at the China Europe International Business School (CEIBS) and Centre for Applied Research on International Markets, Banking, Finance and Regulation (BAFFI CAREFIN) at Bocconi University for financial support. The Area and the Center played no role in study design, data collection and analysis, or preparation of the manuscript.

Supplemental Material: The data files and online appendix are available at https://doi.org/10.1287/mnsc.2022.4595 .
Capturing Travel Mode Adoption in Designing On-Demand Multimodal Transit Systems
Authors: Basciftci Beste , Van Hentenryck Pascal
Published: December 2022

This paper studies how to integrate rider mode preferences into the design of on-demand multimodal transit systems (ODMTSs). It is motivated by a common worry in transit agencies that an ODMTS may be poorly designed if the latent demand, that is, new riders adopting the system, is not captured. This paper proposes a bilevel optimization model to address this challenge, in which the leader problem determines the ODMTS design, and the follower problems identify the most cost efficient and convenient route for riders under the chosen design. The leader model contains a choice model for every potential rider that determines whether the rider adopts the ODMTS given her proposed route. To solve the bilevel optimization model, the paper proposes an exact decomposition method that includes Benders optimal cuts and no-good cuts to ensure the consistency of the rider choices in the leader and follower problems. Moreover, to improve computational efficiency, the paper proposes upper and lower bounds on trip durations for the follower problems, valid inequalities that strengthen the no-good cuts, and approaches to reduce the problem size with problem-specific preprocessing techniques. The proposed method is validated using an extensive computational study on a real data set from the Ann Arbor Area Transportation Authority, the transit agency for the broader Ann Arbor and Ypsilanti region in Michigan. The study considers the impact of a number of factors, including the price of on-demand shuttles, the number of hubs, and access to transit systems criteria. The designed ODMTSs feature high adoption rates and significantly shorter trip durations compared with the existing transit system and highlight the benefits of ensuring access for low-income riders. Finally, the computational study demonstrates the efficiency of the decomposition method for the case study and the benefits of computational enhancements that improve the baseline method by several orders of magnitude.

Funding: This research was partly supported by National Science Foundation [Leap HI Proposal NSF-1854684] and the Department of Energy [Research Award 7F-30154].
Optimizing Academic Achievement through Comprehensive Integration of Formative Assessment into Teaching
Authors: Hidayat Nandang , Irdiyansyah Iyan
Published: December 2022

Learning activities are conducted to help students achieve optimal academic achievement. This research aims to optimize student academic achievement through a learning process that integrates comprehensive formative assessments, including formative tests, self-assessment, peer assessment, and the initiator of creating summaries or concept maps that are given to students in a structured manner at the end of every lesson. The research method used was a quasi-experimental method with a 2x2 factorial design. Students enrolled in the biology education program of the basic physics course for the 1st semester of the 2019 academic year participated in this study. The participants were 66 undergraduate students divided into two classes. Thirty-four students in the experimental group were in class A, while 32 students in the control group were in class B. Data were collected using a learning outcome test instrument to measure academic achievement, which was tested at the end of the semester. Data were analyzed using a two-way ANOVA. This study concluded that a learning process that includes comprehensive formative assessment significantly affects students' academic achievement. These findings support the theory that formative assessment provides feedback, correction, and improvement in student learning.
Accurate compensation and prediction of the temperature cross-sensitivity of tilted FBG cladding mode resonances
Authors: Imas J. J. , Bai X. , Zamarreño C. R. , Matías I. R. , Albert J.
Published: December 2022

The temperature dependence of core mode resonance has been thoroughly studied in fiber Bragg gratings (FBGs), but it is not the case for cladding mode resonances in multi-resonance gratings such as tilted FBGs (TFBGs). In this work, the temperature sensitivity of ultraviolet written TFBGs in SMF-28 fibers is assessed, demonstrating in the first, to the best of our knowledge, place that a single gauge factor

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d
T

. Therefore, this model will enable to completely remove the temperature-induced shifts of all resonances in TFBG sensing applications and measure with great accuracy the variables of interest by using the scaled averages of groups of resonances instead of (less accurate) individual shifts.
Different view on diffraction-limited imaging optics design
Authors: Němcová Šárka , Havran Vlastimil , Hošek Jan
Published: December 2022

The task of imaging optics design starts with choosing a subset of imaging parameters such as the object distance, the image magnification, the image resolution, and the depth of field. It is clear that the imaging parameters are inter-related and their appropriate trade-off is the key problem of final optical design. We provide a novel analysis of the optical design considering diffractive imaging phenomena and thin lens approximation, and we derive formulas for the solution of individual parameters. We show that combinations of three independent optical design input variables determine all other optical and geometrical parameters under diffraction-limited optical imaging. We also formulate an invariant relation in the object space if the depth of field is one of the design’s target parameters.
Features of noncollinear second harmonic generation by infrared laser pulses with opposite frequency chirps
Authors: Kuzmin I. V. , Mironov S. Yu. , Martyanov M. A. , Potemkin A. K.
Published: December 2022

The features of noncollinear second harmonic generation during the interaction of broadband laser pulses with opposite frequency chirps are considered. The impact of spectral phase mismatch of the interacting pulses on spectrum width and the efficiency of conversion to the noncollinear second harmonic is analyzed on an example of lithium triborate and beta-barium borate crystals.
Analytical design of a cemented-curved-prism based integral field spectrometer (CIFS) with high numerical aperture and high resolution
Authors: Zhao Shijia , Ji Yiqun , Feng Anwei , Zhang Xingyun , Han Jizhou
Published: December 2022

Snapshot hyperspectral imaging is superior to scanning spectrometers due to its advantage in dimensionality, allowing longer pixel dwell time and higher data cube acquisition efficiency. Due to the trade-off between spatial and spectral resolution in snapshot spectral imaging technologies, further improvements in the performance of snapshot imaging spectrometers are limited. Therefore, we propose a cemented-curved-prism-based integral field spectrometer (CIFS), which achieves high spatial and high spectral resolution imaging with a high numerical aperture. It consists of a hemispherical lens, a cemented-curved-prism and a concave spherical mirror. The design idea of aplanatic imaging and sharing-optical-path lays the foundation for CIFS to exhibit high-resolution imaging in a compact structure. The numerical model between the parameters of optical elements and the spectral resolution of the system is established, and we analyze the system resolution influenced by the hemispherical lens and the cemented-curved-prism. Thus, the refractive index requirements of the hemispherical lens and the cemented-curved-prism for the optimal spatial and spectral resolution imaging of the system are obtained, providing guidance for the construction of CIFS. The designed CIFS achieves pupil matching with a 1.8 f-number lenslet array, sampling 268 × 76 spatial points with 403 spectral channels in the wavelength band of 400 to 760 nm. The spectral and spatial resolution are further evaluated through a simulation experiment of spectral imaging based on Zemax. It paves the way for developing integral field spectrometers exhibiting high spatial and high spectral resolution imaging with high numerical aperture.
CSI-based sliding window fingerprinting method tailored for a signal blocking environment in VLP systems
Authors: Wang Kaiyao , Huang Xinpeng , Liu Yongjun , Hong Zhiyong , Zeng Zhiqiang
Published: December 2022

In visible light indoor positioning systems, the localization performance of the received signal strength (RSS)-based fingerprinting algorithm would drop dramatically due to the occlusion of the line-of-sight (LOS) signal caused by randomly moving people or objects. A sliding window fingerprinting (SWF) algorithm based on channel state information (CSI) is put forward to enhance the accuracy and robustness of indoor positioning in this work. The core idea behind SWF is to combine CSI with sliding matching. The sliding window is used to match the received CSI and the fingerprints in the database twice to obtain the optimal matching value and reduce the interference caused by the lack of the LOS signal. On this premise, in order to reflect the different contributions of various paths in CSI to the calculation of match values, a weighted sliding window fingerprinting (W-SWF) is also proposed for the purpose of further improving the accuracy of fingerprint matching. A 4 m × 4 m × 3 m indoor multipath scene with four LEDs is established to evaluate the positioning performance. The simulation results reveal that the mean errors of the proposed method are 0.20 cm and 1.43 cm respectively when the LOS signal of 1 or 2 LEDs is blocked. Compared with the traditional RSS algorithm, the weighted k-nearest neighbor (WKNN) algorithm, and the adaptive residual weighted k-nearest neighbor (ARWKNN) algorithm, the SWF algorithm achieves over 90% improvement in terms of mean error and root mean square error (RMSE).
Photonic effects in the non-equilibrium optical response of two-dimensional semiconductors
Authors: Smejkal Valerie , Trovatello Chiara , Li Qiuyang , Dal Conte Stefano , Marini Andrea , Zhu Xiaoyang , Cerullo Giulio , Libisch Florian
Published: December 2022

Transient absorption spectroscopy is a powerful tool to monitor the out-of-equilibrium optical response of photoexcited semiconductors. When this method is applied to two-dimensional semiconductors deposited on different substrates, the excited state optical properties are inferred from the pump-induced changes in the transmission/reflection of the probe, i.e., ΔT/T or ΔR/R. Transient optical spectra are often interpreted as the manifestation of the intrinsic optical response of the monolayer, including effects such as the reduction of the exciton oscillator strength, electron-phonon coupling or many-body interactions like bandgap renormalization, trion or biexciton formation. Here we scrutinize the assumption that one can determine the non-equilibrium optical response of the TMD without accounting for the substrate used in the experiment. We systematically investigate the effect of the substrate on the broadband transient optical response of monolayer MoS2 (1L-MoS2) by measuring ΔT/T and ΔR/R with different excitation photon energies. Employing the boundary conditions given by the Fresnel equations, we analyze the transient transmission/reflection spectra across the main excitonic resonances of 1L-MoS2. We show that pure interference effects induced by the different substrates explain the substantial differences (i.e., intensity, peak energy and exciton linewidth) observed in the transient spectra of the same monolayer. We thus demonstrate that the substrate strongly affects the magnitude of the exciton energy shift and the change of the oscillator strength in the transient optical spectra. By highlighting the key role played by the substrate, our results set the stage for a unified interpretation of the transient response of optoelectronic devices based on a broad class of TMDs.
Temporal optical activity and chiral time-interfaces [Invited]
Authors: Yin Shixiong , Wang Yao-Ting , Alù Andrea
Published: December 2022

Time-interfaces, at which the optical properties of a medium undergo abrupt and spatially uniform changes, have attracted surging interest in optics and wave physics. In this work, we study wave scattering at time-interfaces involving chiral media. Dual to spatial interfaces involving chiral media, we show that a propagating wave is split upon a chiral time-interface into two orthogonal circular polarization waves oscillating at different frequencies. We formulate the temporal scattering boundary-value problem at such time-interfaces, and then demonstrate the effect of temporal optical activity through a chiral time-slab. The effect of material dispersion is also analyzed, highlighting interesting opportunities in which multiple scattered waves emerge form the time-interface and interfere. Our results pave the way towards time-metamaterials encompassing chirality as an additional degree of freedom for wave manipulation, offering opportunities for temporal circular dichroism and negative refraction at time-interfaces.
Stepped-height ridge waveguide MQW polarization mode converter monolithically integrated with sidewall grating DFB laser
Authors: Sun Xiao , Cheng Weiqing , Liang Song , Ye Shengwei , Huang Yongguang , Zhang Ruikang , Qiu Bocang , Xiong Jichuan , Liu Xuefeng , Marsh John H. , Hou Lianping
Published: December 2022

We report, to the best of our knowledge, the first demonstration of a 1555-nm stepped-height ridge waveguide polarization mode converter monolithically integrated with a sidewall grating distributed-feedback (DFB) laser using the identical epitaxial layer scheme. The device shows stable single longitudinal mode (SLM) operation with the output light converted from TE to TM polarization with an efficiency of >94% over a wide range of DFB injection currents (IDFB) from 140 mA to 190 mA. The highest TM mode purity of 98.2% was obtained at IDFB = 180 mA. A particular advantage of this device is that only a single step of metalorganic vapor-phase epitaxy and two steps of III-V material dry etching are required for the whole integrated device fabrication, significantly reducing complexity and cost.
Efficient generation of collimated multi-GeV gamma-rays along solid surfaces
Authors: Zhu Xing-Long , Liu Wei-Yuan , Chen Min , Weng Su-Ming , Wu Dong , Sheng Zheng-Ming , Zhang Jie
Published: December 2022

Bright

γ

-ray sources are of great significance for fundamental research, medicine, and industry. However,

γ

-ray production by bremsstrahlung, Compton scattering, and synchrotron radiation is often subjected to large divergence, wide size, and/or low efficiency, making it difficult to achieve high-brightness

γ

-ray sources. Here, we have found an efficient mechanism to generate

γ

-rays with, to our knowledge, unprecedented brilliance by use of an ultrarelativistic electron beam with nC charge incident onto a solid surface at grazing incidence. With this interaction configuration, extreme high quasistatic magnetic fields up to the gigagauss level or effective electric fields up to

10

14

V

/

m

are induced by the background electron backflows at the target surface. Subsequently, the electron beam is strongly focused by such fields by over an order of magnitude to submicrometer diameter, and its density is increased beyond the solid density; the induced effective fields are high enough to trigger quantum electrodynamics (QED) effects. These result in the production of extremely brilliant dense

γ

-ray beams with photon energy reaching multi-GeV, where the electron-to-photon energy conversion efficiency can exceed 60%. This offers a promising route to push the beam–target interaction to the QED regime, leading to ultrabright

γ

-ray sources for various applications.