bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of the Effect of Service Quality on Company Reputation on Purchase Decisions for Professional Recruitment Services
Authors: Fernando  , Bintoro B. P. Kusumo , Lutfiani Ninda , Haryanto  , Julianingsih Dwi 
Published: February 2022

This study aims to analyze the effect of company reputation and service quality on purchasing decisions for headhunter services. This study is to determine the basis for consumer considerations in choosing a headhunter company, and for headhunter companies this research can be a reference in maintaining relationships with their customers. There are 3 hypotheses tested, and this study uses quantitative methods by conducting surveys. The sampling method is using probability sampling with a sample size of 115 respondents based on the hair formula. As for analyzing the data of this study using multiple linear regression analysis methods.The company's reputation and service quality both influence the decision to purchase headhunter services, with the main factor having higher relevance being the service quality variable. This study aims to determine the relationship of company reputation and service quality to purchasing decisions on professional recruitment services. Future research is expected to raise one case from a large headhunter company (local/international) regarding building the reputation of a headhunter service company. This is so that the headhunter Industry has a proven academic subject of what reputation looks like in the Headhunter Industry
AI Based Drones for Security Concerns in Smart Cities
Authors: Rawat Bhupesh , Bist Ankur Singh , Apriani Desy , Permadi Nur Ihsan , Nabila Efa Ayu 
Published: February 2022

The concept of a smart city has attracted the attention of all corners of the world. It updated with new technologies like AI, Blockchain, IoT, Drones, and many other things. Security in big cities is one of the main concerns, and everyone wants to feel safe 24/7 in every activity they do. In this paper, our research aims to highlight the use and importance of drones for intelligent city management, especially in the context of security. The drone security management flow is explained using the methods and technical details. This is followed by discussion on security concern in cities and how it is dealt with AI based drones. In the conclusion section, it is discussed how emerging technology such as blockchain can help improve the management of smart cities. The use of drones supports the intelligent city concept with all its advantages in regional monitoring. Concept of smart cities is catching attention across the globe and it’s important as per context of emerging economies. In this paper, we discussed about the use of emerging technologies to make it possible. AI, Blockchain and Drone technologies are playing important role. Their significance and attention by researchers in exploring possibilities is shown in this paper. This paper will be very useful for researchers and engineers working in the same domain.
PENINGKATAN KETERAMPILAN BERBAHASA INDONESIA SISWA MELALUI VOICE NOTE SEBAGAI MEDIA DISKUSI
Authors: Nurani Dwi Cahaya , Rahardjo Agung Supardjo Budi , Adikara Fahmi Surya 
Published: February 2022

Tujuan penelitian ini adalah untuk meningkatkan keterampilan Berbahasa Indonesia siswa melalui penggunaan voice note pada platform Whatsapp sebagai media diskusi pada siswa kelas III SD Negeri Proyonanggan 01 tahun ajaran 2020/2021. Bentuk penelitian ini adalah penelitian tindakan kelas (PTK). Teknik pengumpulan data adalah observasi, wawancara, tes, dan dokumen. Validitas data adalah triangulasi sumber dan triangulasi teknik, serta validitas isi. Teknis analisis data adalah analisis interaktif, teknik deskriptif komparatif, dan teknik analisis kritis. Berdasarkan hasil penelitian dapat disimpulkan bahwa penggunaan voice note pada platform Whatsapp dapat meningkatkan keterampilan Berbahasa Indonesia Siswa. Peningkatan keterampilan Berbahasa Indonesia siswa tersebut dapat dibuktikan dengan meningkatnya nilai keterampilan Berbahasa Indonesia pada setiap siklus, yaitu nilai rata-rata keterampilan Berbahasa Indonesia siswa pada pratindakan hanya sebesar 69,8. Setekah mendapatkan tindakan di siklus I rata-rata kelas menjadi dan meningkat lagi pada siklus II menjadi 85,1. Pada siklus II siswa yang mencapai KKM sebanyak 30 siswa (90,90%) dari jumlah siswa seluruhnya. Hal ini membuktikan bahwa indikator kinerja penelitian, yaitu ketercapaian KKM ≥75 sebanyak 80% telah terpenuhi. Berdasarkan hal tersebut, dapat disimpulkan bahwa penggunaan voice note pada platform Whatsapp sebagai media diskusi dapat meningkatkan Keterampilan Berbahasa Indonesia siswa kelas III SD Negeri Proyonanggan 01 tahun ajaran 2020/2021.
Shape Memory Polymer Foams With Phenolic Acid-Based Antioxidant and Antimicrobial Properties for Traumatic Wound Healing
Authors: Du Changling , Liu Jingyi , Fikhman David Anthony , Dong Katheryn Shi , Monroe Mary Beth Browning 
Published: February 2022

The leading cause of trauma-related death before arrival at a hospital is uncontrolled blood loss. Upon arrival at the hospital, microbial infections in traumatic wounds become an additional factor that increases mortality. The development of hemostatic materials with antimicrobial and antioxidant properties could improve morbidity and mortality in these wounds. To that end, phenolic acids (PAs) were successfully incorporated into the network of shape memory polymer (SMP) polyurethane foams by reacting them with isocyanates. Resulting PA-containing SMP foam shape memory properties, antimicrobial and antioxidant activity, and blood and cell interactions were characterized. Results showed that p-coumaric, vanillic, and ferulic acids were successfully incorporated into the SMP foams. The PA-containing SMP foams retained the antimicrobial and antioxidant properties of the incorporated PAs, with ∼20% H2O2 scavenging and excellent antimicrobial properties again E. coli (∼5X reduction in CFUs vs. control foams), S. aureus (∼4.5X reduction in CFUs vs. control foams, with comparable CFU counts to clinical control), and S. epidermidis (∼25–120X reduction in CFUs vs. control foams, with comparable CFU counts to clinical control). Additionally, appropriate thermal and shape memory properties of PA foams could enable stable storage in low-profile secondary geometries at temperatures up to ∼55°C and rapid expand within ∼2 min after exposure to water in body temperature blood. PA foams had high cytocompatibility (&gt;80%), non-hemolytic properties, and platelet attachment and activation, with improved cytocompatibility and hemocompatibility in comparison with clinical, silver-based controls. The incorporation of PAs provides a natural non-antibiotic approach to antimicrobial SMP foams with antioxidant properties. This system could improve outcomes in traumatic wounds to potentially reduce bleeding-related deaths and subsequent infections.
Turning in Circles: Understanding Manual Wheelchair Use Towards Developing User-Friendly Steering Systems
Authors: Togni Reto , Kilchenmann Andrea , Proffe Alba , Mullarkey Joel , Demkó László , Taylor William R. , Zemp Roland 
Published: February 2022

For people with physical disabilities, manual wheelchairs are essential enablers of mobility, participation in society, and a healthy lifestyle. Their most general design offers great flexibility and direct feedback, but has been described to be inefficient and demands good coordination of the upper extremities while critically influencing users’ actions. Multiple research groups have used Inertial Measurement Units (IMUs) to quantify physical activities in wheelchairs arguing that knowledge over behavioural patterns in manual wheelchair usage can guide technological development and improved designs. The present study investigates turning behaviour among fulltime wheelchair users, laying the foundation of the development of novel steering systems that allow directing kinetic energy by means other than braking. Three wearable sensors were installed on the wheelchairs of 14 individuals for tracking movement over an entire week. During detected “moving windows”, phases where the velocities of the two rear wheels differed by more than 0.05 m/s were considered as turns. Kinematic characteristics for both turns-on-the-spot as well as for moving turns were then derived from the previously reconstructed wheeled path. For the grand total of 334 km of recorded wheelchair movement, a turn was detected every 3.6 m, which equates to about 900 turns per day on average and shows that changing and adjusting direction is fundamental in wheelchair practice. For moving turns, a median turning radius of 1.09 m and a median turning angle of 39° were found. With a median of 89°, typical turning angles were considerably larger for turns-on-the-spot, which accounted for roughly a quarter of the recognised turns and often started from a standstill. These results suggest that a frequent pattern in daily wheelchair usage is to initiate movement with an orienting turn-on-the-spot, and cover distances with short, straightforward sections while adjusting direction in small and tight moving turns. As large bends often require simultaneous pushing and breaking, this is, perhaps, the result of users intuitively optimising energy efficiency, but more research is needed to understand how the design of the assistive devices implicitly directs users’ movement.
Midwall Fibrosis and Cardiac Mechanics: Rigid Body Rotation Is a Novel Marker of Disease Severity in Pediatric Primary Dilated Cardiomyopathy
Authors: Al-Wakeel-Marquard Nadya , Seidel Franziska , Kühnisch Jirko , Kuehne Titus , Berger Felix , Messroghli Daniel R. , Klaassen Sabine 
Published: February 2022

BackgroundMidwall fibrosis (MWF) detected by late gadolinium enhancement (LGE) cardiovascular magnetic resonance (CMR) predicts adverse outcome in adults with dilated cardiomyopathy (DCM). Its relevance in children and adolescents is relatively unknown. Left ventricular (LV) strain, rotation and twist are important parameters of cardiac function; yet, their role in pediatric heart failure is understudied. This study aimed to evaluate MWF and cardiac mechanics in pediatric DCM.MethodsPatients ≤21 years with primary DCM were prospectively enrolled and underwent standardized CMR including LGE. All participants were categorized according to the presence or absence of MWF (MWF+ vs. MWF–). Cardiac mechanics were assessed using CMR feature tracking. Impaired LV twist with apex and base rotating in the same direction was termed rigid body rotation (RBR).ResultsIn total, 17 patients (median age 11.2 years) were included. MWF was present in seven patients (41%). Median N-terminal pro brain natriuretic peptide (NT-proBNP) was higher (5,959 vs. 242 pg/ml, p = 0.887) and LV ejection fraction (LVEF) lower (28 vs. 39%, p = 0.536) in MWF+ vs. MWF– patients, yet differences were not statistically significant. MWF+ patients had reduced global longitudinal (GLS), circumferential (GCS) and radial strain (GRS), again without statistical significance (p = 0.713, 0.492 and 1.000, respectively). A relationship between MWF and adverse outcome was not seen (p = 0.637). RBR was more common in MWF+ (67 vs. 50%), and was associated with the occurrence of adverse events (p = 0.041). Patients with RBR more frequently were in higher New York Heart Association classes (p = 0.035), had elevated NT-proBNP levels (p = 0.002) and higher need for catecholamines (p = 0.001). RBR was related to reduced GLS (p = 0.008), GCS (p = 0.031), GRS (p = 0.012), LV twist (p = 0.008), peak apical rotation (p &lt; 0.001), and LVEF (p = 0.001), elevated LV end-diastolic volume (p = 0.023) and LV end-systolic volume (p = 0.003), and lower right ventricular stroke volume (p = 0.023).ConclusionsMWF was common, but failed to predict heart failure. RBR was associated with clinical and biventricular functional signs of heart failure as well as the occurrence of adverse events. Our findings suggest that RBR may predict outcomes and may serve as a novel marker of disease severity in pediatric DCM.Clinical Trial Registration:https://clinicaltrials.gov/, identifier: NCT03572569.
A Concomitant Cancer Diagnosis Is Associated With Poor Cardiovascular Outcomes Among Acute Myocardial Infarction Patients
Authors: Peng Xiang , Wang Zhuozhong , Cao Muhua , Zheng Yuqi , Tian Ya'nan , Yu Li , Ni Wenjun , Wang Shanjie , Qin Zhifeng , Zhao Suhong , Tian Jinwei , Yu Bo 
Published: February 2022

Background and AimsWith the increasing coexistence of cardiovascular disease and cancer in contemporary clinical practice, studies on the outcomes in acute myocardial infarction (AMI) patients with cancer has not been systematically investigated. This study sought to investigated the effect of coexisting cancer on the treatment and clinical outcomes among AMI patients.MethodsWe retrospectively integrated and analyzed cardiovascular data of 6,607 AMI patients between June 2016 and December 2019. Patients with cancer were compared with pair-matched cancer-naive patients. Cox proportional hazards models were constructed to compare the differences in outcomes.ResultsOf 6,607 patients, 2.3% (n = 150) had been diagnosed with cancer. Patients with cancer were older (70.3 ± 10.0 vs. 63.9 ± 11.5 years, P &lt; 0.001) and had a higher burden of comorbidities. Moreover, patients with cancer tended to receive clopidogrel (52.0 vs. 40.0%, P = 0.004) rather than ticagrelor (45.6 vs. 58.2%, P = 0.003) than those without cancer. After pairwise matching, patients with cancer were less likely to undergo in-hospital percutaneous coronary intervention (61.3 vs. 70.0%, P = 0.055). And after 3-year follow-up, the cumulative incidence of cardiovascular death (14.0 vs. 8.3%; adjusted HR, 1.93; 95% CI, 1.11–3.39; P = 0.021) among patients with cancer was significantly higher than that among the matched controls, a similar pattern was observed for the composite outcome of cardiovascular death, non-fatal myocardial infarction, and non-fatal stroke (16.0 vs. 10.3%; adjusted HR, 1.98; 95% CI, 1.21–3.26; P = 0.007). Moreover, patients with a historical cancer diagnosis within 5 years had a higher risk of cardiovascular ischemic events.ConclusionsAMI patients with a concomitant diagnosis of cancer tended to be treated with conservative therapies and were at substantially higher risk for adverse cardiovascular outcomes.
Value of the Systemic Immune-Inflammatory Index (SII) in Predicting the Prognosis of Patients With Peripartum Cardiomyopathy
Authors: Zhang Yuan , Liu Wenzhao , Yu Huaitao , Chen Zhen , Zhang Chunmei , Ti Yun , Bu Peili 
Published: February 2022

BackgroundPeripartum cardiomyopathy (PPCM) is a potentially life-threatening complication of pregnancy. The identification of early prognostic markers in patients diagnosed with PPCM is very important. The systemic immune-inflammation index (SII) is a new inflammatory biomarker, and the aim of this study was to evaluate the prognostic value of SII in patients with PPCM.MethodsA total of 61 patients with PPCM who were admitted in our hospital from 2015 to 2020 were retrospectively analyzed in this study. The follow-up period of all patients was at least 6 months after diagnosis. Recovery of left ventricular (LV) systolic function was defined as the presence of left ventricular ejection fraction &gt; 45%. The second endpoint was defined as composite adverse cardiac events, including cardiac death or hospitalization due to worsening heart failure. Univariate and multivariate logistic regression analysis were used to determine the independent predictors of non-recovery of LV systolic function. The receiver operating characteristic (ROC) curve analysis was used to establish a cut-off level of SII value to predict persistent LV systolic dysfunction.ResultsThe follow-up duration was 40.5 ± 16.3 months. Among the 61 patients, 43 patients showed left ventricular recovery and 18 patients did not at the last follow-up visit. The baseline SII levels were significantly higher in the non-recovery group (P &lt; 0.05). Multivariate logistic regression showed that the SII and left ventricular end-diastolic dimension (LVEDD) were independent predictors of persistent LV systolic dysfunction (OR: 1.177, 95% CI: 1.038–1.335, P = 0.011 and OR: 1.148, 95% CI: 1.011–1.304, P = 0.033, respectively). A SII value of 876 was the best cut-off value (the area under the curve was 0.791, 95% CI: 0.667–0.915, P &lt; 0.05), and the sensitivity and specificity were 73 and 71%, respectively.ConclusionsThe SII and LVEDD are independent prognostic factors for persistent LV systolic dysfunction in patients with PPCM. The SII may be a useful tool for identifying high-risk PPCM patients.
Biological Nitrogen Fixation and Nitrogen Accumulation in Peatlands
Authors: Yin Tianya , Feng Maoyuan , Qiu Chunjing , Peng Shushi 
Published: February 2022

Peatlands cover about 3% of the Earth’s surface and are regarded as a vital carbon (C) pool and sink. The formation of peatland is supported by continuously supplied nitrogen (N) but the sources of this N remain unclear. Here, we first review N stocks and the rate they accumulate in peatlands, then we present the sources of N, especially through biological nitrogen fixation (BNF). We found that global peatlands store 5.9–25.9 Gt N. In the past millennia, northern peatlands have a lower N accumulated rate than tropical undisturbed peatlands. BNF rate is approximately 1.9 ± 2.7 g m−2 yr−1 in northern peatlands, higher than the rate of N deposition, 0.5 ± 0.4 g m−2 yr−1. For tropical peatlands, BNF observation has hardly been reported yet and needs further investigation. This review provides a broad picture of peatland N cycling and suggests that there are large uncertainties, due to limited observations of BNF and N fluxes by inflow and outflow runoff. Therefore, we call for more efforts contributing to field observations and modelling of the N budget in peatlands.
Spatial Distribution of Unique Biological Communities and Their Control Over Surface Reflectivity of the Stanley Glacier, Uganda
Authors: Uetake Jun , Samyn Denis , Anguma Simon , Takeuchi Nozomu 
Published: February 2022

Diverse microbes have been revealed to live in glaciers worldwide, but only a few biological studies were dedicated to glaciers in tropical Africa. These glaciers are shrinking rapidly and are expected to disappear shortly. In this study, we carried out biological and glaciological field observations on Stanley Glacier, the largest remaining glacier in the Rwenzori Mountains, Uganda, Africa. Microbial aggregates ranging from micrometer to centimeter in size were found on the glacier surface and contained moss and various types of Chlorophyta, among which a new endemic species of green alga. Concentrations of total impurities on the glacier surface, including microbial aggregates, varied spatially and decreased as altitude increased. The large microbial aggregates (larger than 4 cm in diameter) were found only at the glacier surface near the terminus and side margins, where the surface was less frequently covered with snow. It is also shown that the total organic matter on the glacier surface is determined by the timing of snow cover, which affects the quantity of solar radiation reaching the glacier ice surface. Furthermore, the total impurity content was negatively correlated with surface reflectivity, revealing their potential role in albedo reduction at the glacier surface through positive feedback between enhanced meltwater and increased biological growth.
pH-Responsive Drilling Fluid With High-Temperature and High-Density Performance
Authors: Li Daqi , Jin Junbin , Zhang Dujie , Li Fan , Wang Xianguang , Liu Lu 
Published: February 2022

Conventional drilling fluids experience the problems of a low cleanup efficiency and oily drilled cutting disposal. To resolve these problems, a type of pH-responsive drilling fluid with a temperature resistance of up to 150°C resistance a density of 1.5 g/cm3 was prepared using mixed emulsifiers. Stable reversion from a water-in-oil (W/O) emulsion to an oil-in-water (O/W) and vice versa was realized. The results of light backscattering and sag stability suggested that the W/O and O/W emulsion-based drilling fluids showed excellent resistance to coalescence or sedimentation. There was no demulsification or barite sedimentation during emulsion reversion. W/O and O/W emulsions exhibited small droplet sizes and uniform distributions. The properties of the W/O and O/W emulsion-based drilling fluids were similar even after hot rolling at 150°C for 16 h. The reversible drilling fluid showed excellent resistance to contamination by saline water and drilled cuttings. The residual W/O emulsion-based drilling fluid was cleaned with acids at a high efficiency. The oil content of the drill cuttings generated by the W/O emulsion-based drilling fluid was reduced using simple acids. The improved reversion stability with high temperature and density resistance makes it possible for applicable reversible drilling fluid in deep or ultra-deep wells required by different geological formation.
Effect of Moderate Aerobic Exercise on Complement Activation Pathways in Polycystic Ovary Syndrome Women
Authors: Ramanjaneya Manjunath , Abdalhakam Ibrahem , Bettahi Ilham , Bensila Milin , Jerobin Jayakumar , Aye Myint Myint , Alkasem Meis , Sathyapalan Thozhukat , Atkin Stephen Lawrence , Abou-Samra Abdul-Badi 
Published: February 2022

BackgroundThe complement system is pivotal in host defense mechanisms, protecting against pathogenic infection by regulating inflammation and cell immunity. Complement-related protein activation occurs through three distinct pathways: classical, alternative, and lectin-dependent pathways, which are regulated by cascades of multiple proteins. Complement activation is recognized in polycystic ovary syndrome (PCOS) to be associated with obesity and insulin sensitivity. Exercise reduces insulin resistance and may help reduce obesity, and therefore, this study was undertaken to determine the effect of exercise on the activation of complement-related proteins in PCOS and control women.Subjects and MeasurementsIn this study, 10 controls and 11 PCOS subjects who were age- and weight-matched underwent an 8-week supervised exercise program at 60% maximal oxygen consumption. Weight was unchanged though insulin sensitivity was increased in PCOS subjects and controls. Fasting baseline and post-exercise samples were collected and 14 complement-related proteins belonging to classical, alternative, and lectin-dependent pathways were measured.ResultsBaseline levels of complement C4b and complement C3b/iC3b were higher in PCOS (P &lt; 0.05) compared with controls. Exercise reduced complement C1q (P &lt; 0.05), C3 (P &lt; 0.001), C4 (P &lt; 0.01), factor B (P &lt; 0.01), factor H (P &lt; 0.01), and properdin (P &lt; 0.05) in controls, but not in PCOS women.ConclusionExercise induced complement changes in controls that were not seen in PCOS subjects, suggesting that these pathways remain dysregulated even in the presence of improved insulin sensitivity and not improved by moderate aerobic exercise.Clinical Trial RegistrationISRCTN registry, ISRCTN42448814.