bluuebunny/crossref_metadata_2025 huggingface dataset:
Application of Histogram-Based Outlier Scores to Detect Computer Network Anomalies
Authors: Paulauskas Nerijus , Baskys Algirdas
Published: November 2019

Misuse activity in computer networks constantly creates new challenges and difficulties to ensure data confidentiality, integrity, and availability. The capability to identify and quickly stop the attacks is essential, as the undetected and successful attack may cause losses of critical resources. The anomaly-based intrusion detection system (IDS) is a valuable security tool that is capable of detecting new, previously unseen attacks. Anomaly-based IDS sends an alarm when it detects an event that deviates from the behavior characterized as normal. This paper analyses the use of the histogram-based outlier score (HBOS) to detect anomalies in the computer network. Experimental results of different histogram creation methods and the influence of the number of bins on the performance of anomaly detection are presented. Experiments were conducted using an NSL-KDD dataset.
OTL-Classifier: Towards Imaging Processing for Future Unmanned Overhead Transmission Line Maintenance
Authors: Zhang Fan , Fan Yalei , Cai Tao , Liu Wenda , Hu Zhongqiu , Wang Nengqing , Wu Minghu
Published: November 2019

The global demand for electric power has been greatly increasing because of industrial development and the change in people’s daily life. A lot of overhead transmission lines have been installed to provide reliable power across long distancess. Therefore, research on overhead transmission lines inspection is very important for preventing sudden wide-area outages. In this paper, we propose an Overhead Transmission Line Classifier (OTL-Classifier) based on deep learning techniques to classify images returned by future unmanned maintenance drones or robots. In the proposed model, a binary classifier based on Inception architecture is incorporated with an auxiliary marker algorithm based on ResNet and Faster-RCNN(Faster Regions with Convolutional Neural Networks features). The binary classifier defines images with foreign objects such as balloons and kites as abnormal class, regardless the type, size, and number of the foreign objects in a single image. The auxiliary marker algorithm marks foreign objects in abnormal images, in order to provide additional help for quick location of hidden foreign objects. Our OTL-Classifier model achieves a recall rate of 95% and an error rate of 10.7% in the normal mode, and a recall rate of 100% and an error rate of 35.9% in the Warning–Review mode.
CMOS Voltage Reference Using a Self-Cascode Composite Transistor and a Schottky Diode
Authors: Brito Thaironi M. , Colombo Dalton M. , Moreno Robson L. , El-Sankary Kamal
Published: November 2019

This work presents an investigation of the temperature behavior of self-cascode composite transistors (SCCTs). Results supported by silicon measurements show that SCCTs can be used to generate a proportional to absolute temperature voltage or even a temperature-compensated voltage. Based on the achieved results, a new circuit topology of a resistorless voltage reference circuit using a Schottky diode is also presented. The circuit was fabricated in a 130 nm BiCMOS process and occupied a silicon area of 67.98 µm × 161.7 µm. The averaged value of the output voltage is 720.4 mV, and its averaged line regulation performance is 2.3 mV/V, calculated through 26 characterized chip samples. The averaged temperature coefficient (TC) obtained through five chip samples is 56 ppm/°C in a temperature range from −40 to 85 °C. A trimming circuit is also included in the circuit topology to mitigate the impact of the fabrication process effects on its TC. The circuit operates with a supply voltage range from 1.1 to 2.5 V.
Gene Introgression among Closely Related Species in Sympatric Populations: A Case Study of Three Walnut (Juglans) Species
Authors: Dang Meng , Yue Ming , Zhang Min , Zhao Guifang , Zhao Peng
Published: November 2019

Gene introgression usually results from natural hybridization occurring among closely related species in sympatric populations. In this study, we discussed two rare and frequent gene flow phenomena between three species of Juglans plants and analyzed the possible causes for the difference. We collected 656 individuals from 40 populations of Persian walnut (Juglans regia L.), Chinese walnut (J. cathayensis Dode), and Iron walnut (J. sigillata Dode) that were genotyped at 17 expressed sequence tag simple sequence repeat (EST-SSR) loci to analyze the introgressions between J. regia and J. cathayensis, and J. regia and J. sigillata. Our study compared the spatial patterns of expected heterozygosity (HE), allelic richness (Rs), and private allele richness (PAR) so as to vividly infer the biogeographic history of related species of Juglans in the two regions. The results of the PCoA, UPGMA, and STRUCTURE analyses showed that all J. regia and J. sigillata populations clustered into one group, and the J. cathayensis populations clustered into the other group. The results of the historical gene flow analysis indicated that J. regia and J. sigillata have no genetic barriers, and the directional gene flow is mainly from J. regia to J. sigillata. For the three species of Juglans, all the above results indicated that gene flow was common among the same group of Juglans, and only rare and low-level gene flow appeared in distinct groups. Therefore, our study revealed multiple phenomena of gene flow and introgression among closely related species in sympatric populations, thereby providing a theoretical basis for the genetic evolution of the genus Juglans.
Name-Based Security for Information-Centric Networking Architectures
Authors: Fotiou Nikos , Polyzos George C.
Published: November 2019

Information-Centric Networking (ICN) is an emerging communication paradigm built around content names. Securing ICN using named-based security is, therefore, a natural choice. For this paper, we designed and evaluated name-based security solutions that satisfy security requirements that are particular to ICN architectures. In order to achieve our goal, we leverage identity-based encryption, identity-based proxy re-encryption, and the emerging paradigm of decentralized identifiers. Our solutions support outsourcing content storage, content integrity protection and content authentication, and provenance verification, as well as access control. We show that our solutions have tolerable storage and computation overhead, thus proving their feasibility.
Research on Cooperative Communication Strategy and Intelligent Agent Directional Source Grouping Algorithms for Internet of Things
Authors: Zou Yongyan , Zhang Yanzhi , Yi Xin
Published: November 2019

In order to improve the network layer of the Internet of things to improve transmission reliability, save time delay and energy consumption, the Internet of things cooperative communication and intelligent agent technology were studied in this paper. In cooperative communication, a new cooperative communication algorithm KCN (k-cooperative node), and a reliability prediction model are proposed. The k value is determined by the end-to-end reliability. After k cooperative nodes are selected, other nodes enter dormancy. In aggregate traffic allocation, game theory is used to model the traffic equilibrium and end-to-end delay optimization scenarios. In practice, the optimal duty cycle can be calculated, which makes some cooperative nodes enter an idle state to save energy. Under the premise of guaranteeing end-to-end delay, it is shown that the reliability of the proposed KCN algorithm is better than that of the other existing routing protocols. In the aspect of intelligent agent, a Directional source grouping based multi-Agent Itinerary Planning (D-MIP) is proposed. This algorithm studies the routing problem of multi-agent parallel access to multiple source nodes. A directed source packet multi-agent routing planning algorithm is proposed. The iterative algorithm of each source node is limited to a sector, and the optimal intelligent agent route is obtained by selecting an appropriate angle. Compared with other algorithms, it is shown through a lot of simulated results that energy consumption and time delay has been saved by the proposed D-MIP algorithm.
How Can You Not Shout, Now That the Whispering Is Done? Accounts of the Enemy in US, Hmong, and Vietnamese Soldiers’ Literary Reflections on the War
Authors: Beard David
Published: November 2019

As typified in the Christmas Truce, soldiers commiserate as they see themselves in the enemy and experience empathy. Commiseration is the first step in breaking down the rhetorical construction of enemyship that acts upon soldiers and which prevents reconciliation and healing. This essay proceeds in three steps. We will identify first the diverse forms of enemyship held by the American, by the North Vietnamese, and by the Hmong soldiers, reading political discourse, poetry, and fiction to uncover the rhetorical constructions of the enemy. We will talk about both an American account and a North Vietnamese account of commiseration, when a soldier looks at the enemy with compassion rooted in identification. Commiseration is fleeting; reconciliation and healing must follow, and so finally, we will look at some of the moments of reconciliation, after the war, in which Vietnamese, Hmong and American soldiers (and their children and grandchildren) find healing.
‘Once Upon a Time in Marseille’: Displacement and the Fairy Tale in Anna Seghers’ Transit
Authors: Slodounik Rebekah
Published: November 2019

Written in 1941, while she was living in exile in Mexico, and published in 1944 in Mexico and the United States, Anna Seghers’ novel Transit replicates on a formal level an experience of displacement, statelessness, and exile. In the following analysis, I examine Transit as a text of forced migration. Several features of the novel attempt to produce an experience of displacement: the narrative situation, the incorporation of descriptions that place the events of World War II into a longer history of forced migration, and the use of references to the genre of the fairy tale. The descriptions that engage with past forced migration and displacement attempt to universalize the historical specificities of the time period, whereas the references to fairy tales generate a sense of timelessness associated with this genre. Through these strategies, Seghers’ novel itself attempts to displace time. Seghers situates Transit within a long history of forced migration and exile, in which the categories that are often used to define and divide populations—such as nationality, ethnicity, and religion—are in flux. By emphasizing the role of mistaken identity, Seghers destabilizes the concept of immutable identities in a period of upheaval and transition.
Intertextuality, Christianity and Death: Major Themes in the Poetry of Stevie Smith
Authors: Woolf Judith
Published: November 2019

Stevie Smith, one of the most productive of twentieth-century poets, is too often remembered simply as the coiner of the four-word punch line of a single short poem. This paper argues that her claim to be seen as a great writer depends on the major themes which—in addition to “death by water”—she shares with T.S. Eliot: Anglicanism and the modern reworking of classical literature, with a strong, and in her case sometimes autobiographical, emphasis on female protagonists. Where the female figures in Eliot’s The Waste Land are seen as parodic and diminished contemporary versions of their classical originals, Smith enters and reimagines her classical sources, testing the strength of the narrative material which binds Phèdre, Antigone, Persephone and Helen of Troy to their fates. In contrast to Eliot’s adult conversion to Anglo-Catholicism, Smith became a convert to agnosticism, engaging in a passionate poetic argument with the faith of her childhood, which led her to challenge Eliot himself. She brings both of these themes together in the most personal of her poems, which celebrate, and ultimately invoke, Thanatos, “the only god/Who comes as a servant”, and who puts a merciful end to all stories by “scattering... the human pattern altogether”.
Smallholder Farmer Perceptions of Postharvest Loss and Its Determinants in Fijian Tomato Value Chains
Authors: Kumar Salesh , Underhill Steven
Published: November 2019

The Fiji Islands, like many small Pacific island nations, are thought to incur high rates of postharvest loss. Little work has been undertaken to quantify the amount of loss within Pacific horticultural value chains, or identify the key determinants. This study sought to quantify postharvest loss within Fijian smallholder tomato value chains and to examine the relative importance of current on-farm practices as possible contributors to this loss. A semi-structured survey of 115 smallholder tomato farmers in Sigatoka Valley and eastern Viti Levu was undertaken, covering socio-economic and demographic parameters, production and postharvest handling practice, and postharvest loss based on farmer recall. On-farm postharvest loss for smallholder farmer tomato value chains was between 26.1% in Sigatoka Valley and 27.6% in eastern Viti Levu. This finding was consistent with quantification of postharvest loss in Fijian tomato chains by direct determination, but is relatively high when compared to smallholder tomato value chain loss in Sub-Saharan Africa. When Fijian tomato value chains were segregated according to specific postharvest handling practice, the contributors to postharvest loss were often associated with on-farm decision-making. Those value chains that only harvested once a week, or in the early morning (before 7 am) or mid-day onwards, stored harvest product in the field for more than three hours, did not sort or grade prior to on-farm ripening, or used packing sheds that had relatively open designs, all had consistently higher levels of postharvest loss. The prevalence of specific postharvest handling practice in both locations is further reported. While this study highlights the impact of current on-farm postharvest handling practices on tomato value chain loss, what remain unclear are the underlying drivers associated with current postharvest handling behaviour and the decision-making that shapes quality and logistic control activities.
Spatial Distribution of Temporalis Pressure Pain Sensitivity in Men with Episodic Cluster Headache
Authors: Palacios-Ceña María , Fuensalida-Novo Stella , Cuadrado María L , Ordás-Bandera Carlos , Madeleine Pascal , Fernández-de-las-Peñas César , Guerrero Ángel L.
Published: November 2019

(1) Background: Spatial changes in pressure sensitivity have been described in migraine and tension-type headaches. Our aim was to determine differences in the spatial distribution of pressure pain sensitivity of the temporalis muscle between cluster headache (CH) patients and headache-free controls; (2) Methods: Pressure pain thresholds (PPTs) were determined over nine points covering the temporalis muscle in 40 men with episodic CH and 40 matched headache-free controls in a blinded fashion. Topographical pressure pain sensitivity maps were constructed based on interpolation of the PPTs. Patients were evaluated in a pain-free period (remission phase), at least 3 months from the last attack and without medication; (3) Results: The analysis of covariance (ANCOVA) found significant difference between points (F = 21.887; P < 0.001) and groups (F = 24.416; P = 0.602), but not between sides (F = 0.440; P = 0.508). No effect of depression (F = 0.014; P = 0.907) or anxiety (F = 0.696; F = 0.407) was observed. A post-hoc analysis revealed: 1) lower PPTs at all points in patients than in controls, 2) an anterior-to-posterior gradient in patients but not in controls, with lower PPTs located in the anterior column. Large between-groups effects were shown in all points (standardized mean difference, SMD > 0.8); (4) Conclusions: Bilateral pressure pain hypersensitivity to pressure pain in the temporalis muscle and an anterior-to-posterior gradient to pressure pain was observed in men with episodic CH.
Associations between Harmful Experiences from Alcohol Use of Others and Mental Health in Korean Adolescents
Authors: Han Mi Ah
Published: November 2019

This study assessed alcohol-induced harm to those not drinking and investigated its association with mental health in Korean adolescents. The 14th Korea Youth Risk Behavior Survey (2018) was used and 60,040 adolescents were analyzed. Harm from others’ alcohol consumption was assessed by four criteria: teasing in public places, being scared in public places, sleep problems, and unsafety of public places due to people drinking alcohol. Mental health included stress, depressive symptoms, suicidal ideation, and attempted suicide. Harm reported due to the alcohol use of others was 5.8% for teasing in public places, 33.6% for being scared in public places, 5.6% for sleep problems, and 40.2% for unsafety of public places among total study participants. Experiences of teasing in public places due to people who drank alcohol were associated with an increased risk of stress, depressive symptoms, suicidal ideation, and suicide attempts. Similarly, experiences of being scared in public places, sleep problems, and unsafety of public places due to people who drank alcohol were associated with poor mental health. In the stratified analysis, alcohol-induced harm was associated with poor mental health in both non-drinkers and drinkers. Harmful experiences from others’ alcohol consumption were associated with poor mental health among Korean adolescents.
Associations between Maternal Health-Related Quality of Life during Pregnancy and Birth Outcomes: The Generation R Study
Authors: Bai Guannan , Korfage Ida J , Mautner Eva , Raat Hein
Published: November 2019

The objective of this study was to assess associations between maternal health-related quality of life (HRQoL) in early, mid-, and late pregnancy and birth outcomes and to assess the differences in birth outcomes between subgroups of mothers reporting relatively “low” and relatively “high” HRQoL. HRQoL was measured by the 12-item Short Form Health Survey in early (n = 6334), mid- (n = 6204), and late pregnancy (n = 6048) in a population-based mother and child cohort; Physical and Mental Component Summary (PCS/MCS) scores were calculated. Birth outcomes included pregnancy duration, preterm birth, birth weight, low birth weight, and small for gestational age. We defined very high PCS/MCS scores as the >90th percentile and very low score as the <10th percentile. The lower PCS score in late pregnancy was significantly associated with a higher chance of having small-for-gestational-age birth (per 10 points: OR = 1.20, 95% CI: 1.08, 1.33, p value = 0.0006). In early, mid-, and late pregnancy, the subgroup mothers with a low MCS score had infants with a lower average birth weight than those with very high scores (p < 0.05). The association between higher physical HRQoL in late pregnancy and a higher chance of having small-for-gestational-age birth needs further research. The role of mother’s mental HRQoL during pregnancy and the potential consequences for the child require further study.
Change in Physical Activity after Diagnosis of Diabetes or Hypertension: Results from an Observational Population-Based Cohort Study
Authors: Rabel Matthias , Mess Filip , Karl Florian M. , Pedron Sara , Schwettmann Lars , Peters Annette , Heier Margit , Laxy Michael
Published: November 2019

Background: Chronic diseases like diabetes mellitus or hypertension are a major public health challenge. Irregular physical activity (PA) is one of the most important modifiable risk factors for chronic conditions and their complications. However, engaging in regular PA is a challenge for many individuals. The literature suggests that a diagnosis of a disease might serve as a promising point in time to change health behavior. This study investigates whether a diagnosis of diabetes or hypertension is associated with changes in PA. Methods: Analyses are based on 4261 participants of the population-based KORA S4 study (1999–2001) and its subsequent 7-and 14-year follow-ups. Information on PA and incident diagnoses of diabetes or hypertension was assessed via standardized interviews. Change in PA was regressed upon diagnosis with diabetes or hypertension, using logistic regression models. Models were stratified into active and inactive individuals at baseline to avoid ceiling and floor effects or regression to the mean. Results: Active participants at baseline showed higher odds (OR = 2.16 [1.20;3.89]) for becoming inactive after a diabetes diagnosis than those without a diabetes diagnosis. No other significant association was observed. Discussion: As PA is important for the management of diabetes or hypertension, ways to increase or maintain PA levels in newly-diagnosed patients are important. Communication strategies might be crucial, and practitioners and health insurance companies could play a key role in raising awareness.
Using Walk-Along Interviews to Identify Environmental Factors Influencing Older Adults’ Out-of-Home Behaviors in a High-Rise, High-Density Neighborhood
Authors: Cao Yuxin , Heng Chye Kiang , Fung John Chye
Published: November 2019

Older adults’ out-of-home behaviors (OOHBs) are critical for maintaining health and quality of life. Taking Singapore’s Yuhua East as a case, this study applied a qualitative approach to explore what neighborhood environmental factors influence older adults’ OOHBs. Twelve older adults were recruited for walk-along interviews through the use of purposeful convenience sampling. A content analysis was conducted using NVivo 11 via an inductive approach. Research results revealed 12 categories of environmental factors that affected older adults’ OOHBs: access to facilities (shops and services, public transit, and connectivity), pedestrian infrastructure (sidewalk quality, sheltered walkways, universal design, crossings, benches, and public toilets), aesthetics (natural elements, buildings, noise, and cleanliness), traffic safety (behavior of other road users and road width), safety from crime, wayfinding, familiarity (long-term residency and routine activities), weather, social contact, high-rise, high-density (lifts, population density, flat size, and privacy), affordability (shops and services, as well as transportation), and maintenance and upgrading. This analysis concluded that access to facilities and pedestrian infrastructure are important for older adults’ OOHBs. Considering Singapore’s weather, sheltered walkways, the proximity of facilities and connectivity should be given serious emphasis. In addition to physical factors, social contacts and the affordability of shops and services are also important.
How Epigenetic Modifications Drive the Expression and Mediate the Action of PGC-1α in the Regulation of Metabolism
Authors: Krämer Anne I. , Handschin Christoph
Published: November 2019

Epigenetic changes are a hallmark of short- and long-term transcriptional regulation, and hence instrumental in the control of cellular identity and plasticity. Epigenetic mechanisms leading to changes in chromatin structure, accessibility for recruitment of transcriptional complexes, and interaction of enhancers and promoters all contribute to acute and chronic adaptations of cells, tissues and organs to internal and external perturbations. Similarly, the peroxisome proliferator-activated receptor γ coactivator 1α (PGC-1α) is activated by stimuli that alter the cellular energetic demand, and subsequently controls complex transcriptional networks responsible for cellular plasticity. It thus is of no surprise that PGC-1α is under the control of epigenetic mechanisms, and constitutes a mediator of epigenetic changes in various tissues and contexts. In this review, we summarize the current knowledge of the link between epigenetics and PGC-1α in health and disease.
Involvement of Receptor for Advanced Glycation Endproducts in Hypertensive Disorders of Pregnancy
Authors: Akasaka Juria , Naruse Katsuhiko , Sado Toshiyuki , Uchiyama Tomoko , Makino Mai , Yamauchi Akiyo , Ota Hiroyo , Sakuramoto-Tsuchida Sumiyo , Itaya-Hironaka Asako , Takasawa Shin , Kobayashi Hiroshi
Published: November 2019

Preeclampsia/hypertensive disorders of pregnancy (PE/HDP) is a serious and potentially life-threatening disease. Recently, PE/HDP has been considered to cause adipose tissue inflammation, but the detailed mechanism remains unknown. We exposed human primary cultured adipocytes with serum from PE/HDP and healthy controls for 24 h, and analyzed mRNA expression of several adipokines, cytokines, and ligands of the receptor for advanced glycation endproducts (RAGE). We found that the mRNA levels of interleukin-6 (IL-6), C-C motif chemokine ligand 2 (CCL2), high mobility group box 1 (HMGB1), and RAGE were significantly increased by the addition of PE/HDP serum. Among RAGE ligands, advanced glycation endproducts (AGE) and HMGB1 increased mRNA levels of IL-6 and CCL2 in SW872 human adipocytes and mouse 3T3-L1 cells. The introduction of small interfering RNA for RAGE (siRAGE) into SW872 cells abolished the AGE- and HMGB1-induced up-regulation of IL-6 and CCL2. In addition, lipopolysaccharide (LPS), a ligand of RAGE, increased the expression of IL-6 and CCL2 and siRAGE attenuated the LPS-induced expression of IL-6 and CCL2. These results strongly suggest that the elevated AGE, HMGB1, and LPS in pregnant women up-regulate the expression of IL-6 and CCL2 via the RAGE system, leading to systemic inflammation such as PE/HDP.
Approximate Completed Trace Equivalence of ILAHSs Based on SAS Solving
Authors: He Honghui , Wu Jinzhao , Xiong Juxia
Published: November 2019

The ILAHS (inhomogeneous linear algebraic hybrid system) is a kind of classic hybrid system. For the purpose of optimizing the design of ILAHS, one important strategy is to introduce equivalence to reduce the states. Recent advances in the hybrid system indicate that approximate trace equivalence can further simplify the design of ILAHS. To address this issue, the paper first introduces the trajectory metric d t r j for measuring the deviation of two hybrid systems’ behaviors. Given a deviation ε ≥ 0 , the original ILAHS of H 1 can be transformed to the approximate ILAHS of H 2 , then in trace equivalence semantics, H 2 is further reduced to H 3 with the same functions, and hence H 1 is ε -approximate trace equivalent to H 3 . In particular, ε = 0 is a traditional trace equivalence. We implement an approach based on RealRootClassification to determine the approximation between the ILAHSs. The paper also shows that the existing approaches are only special cases of our method. Finally, we illustrate the effectiveness and practicality of our method on an example.
Anti-Friction and Anti-Wear Mechanisms of Micro Textures and Optimal Area Proportion in the End Milling of Ti6Al4V Alloy
Authors: Tong Xin , Liu Xianli , Yu Song
Published: November 2019

To solve the problems of low efficiency, poor surface quality, and short tool life in the milling of titanium alloys, this study took the micro-textured ball-end milling tool as a starting point and established a platform for friction and wear tests. Based on a new method of external friction theory, the anti-friction and anti-wear mechanisms of the micro-textured tool were analyzed. According to these mechanisms, the optimal area proportion of the micro textures in the contact area between the chip and tool was theoretically investigated considering the milling force, and the proportion was verified experimentally. This work provides a reference for improving the cutting performance of hard metal tools.
A Scale-up of Energy-Cycle Analysis on Processing Non-Woven Flax/PLA Tape and Triaxial Glass Fibre Fabric for Composites
Authors: Tchana Toffe Gilles , Oluwarotimi Ismail Sikiru , Montalvão Diogo , Knight Jason , Ren Guogang
Published: November 2019

In the drive towards a sustainable bio-economy, a growing interest exists in the development of composite materials using renewable natural resources. This paper explores the life cycle assessment of processing of Flax fibre reinforced polylactic acid (PLA), with a comparison of glass fibre triaxial fabric in the production process. The use of hydrocarbon fossil resources and synthetic fibres, such as glass and carbon, have caused severe environmental impacts in their entire life cycles. Whereas, Flax/PLA is one of the cornerstones for the sustainable economic growth of natural fibre composites. In this study, the manufacturing processes for the production of Flax/PLA tape and triaxial glass fibre were evaluated through a gate-to-gate life cycle assessment (LCA). The assessment was based on an input-output model to estimate energy demand and environmental impacts. The quality of the natural hybrid composite produced and cost-effectiveness of their LCA was dependent on their roving processing speeds and temperature applied to both the Flax/PLA tape and triaxial glass fabrics during processing. The optimum processing condition was found to be at a maximum of 4 m/min at a constant temperature of 170 °C. In contrast, the optimum for normal triaxial glass fibre production was at a slower speed of 1 m/min using a roving glass fibre laminating machine. The results showed that when the Flax and PLA were combined to produce new composite material in the form of a flax/PLA tape, energy consumption was 0.25 MJ/kg, which is lower than the 0.8 MJ/kg used for glass fibre fabric process. Flax/PLA tape and glass fibre fabric composites have a carbon footprint equivalent to 0.036 kg CO2 and 0.11 kg CO2, respectively, under the same manufacturing conditions. These are within the technical requirements in the composites industry. The manufacturing process adopted to transform Flax/PLA into a similar tape composite was considerably quicker than that of woven glass fibre fabric for composite tape. This work elucidated the relationship of the energy consumptions of the two materials processes by using a standard LCA analytical methodology. The outcomes supported an alternative option for replacement of some conventional composite materials for the automotive industry. Most importantly, the natural fibre composite production is shown to result in an economic benefit and reduced environmental impact.
Lack of Syllable Duration as a Post-Lexical Acoustic Cue in Spanish in Contact with Maya
Authors: García Nuria Martínez , Uth Melanie
Published: November 2019

This paper focuses on the duration of stressed syllables in broad versus contrastive focus in Yucatecan Spanish and examines its connection with Spanish–Maya bilingualism. We examine the claim that phonemic vowel length in one language prevents the use of syllable duration as a post-lexical acoustic cue in another. We study the duration of stressed syllables of nouns in subject and object position in subject-verb-object (SVO) sentences (broad and contrastive focus) of a semi-spontaneous production task. One thousand one hundred and twenty-six target syllables of 34 mono- and bilingual speakers were measured and submitted to linear mixed-effects models. Although the target syllables were slightly longer in contrastive focus, duration was not significant, nor was the effect of bilingualism. The results point to duration not constituting a cue to focus marking in Yucatecan Spanish. Finally, it is discussed how this result relates to the strong influence of Yucatec Maya on Yucatecan Spanish prosody observed by both scholars and native speakers of Yucatecan Spanish and other Mexican varieties of Spanish.
The Behavior of Superabsorbent Polymers (SAPs) in Cement Mixtures with Glass Powders as Supplementary Cementitious Materials
Authors: Farzanian Khashayar , Vafaei Babak , Ghahremaninezhad Ali
Published: November 2019

The absorption and desorption of superabsorbent polymers (SAPs) in cement mixtures containing two different glass powders as supplementary cementitious materials are examined in this paper. Two SAPs with different chemical compositions were synthesized in-house and used in the experiments. SAP absorption was investigated directly through the mass change of SAPs in cement slurries, as well as indirectly using the flow test. Scanning electron microscopy was used to monitor the desorption of SAPs using samples prepared with freeze-drying. Hydration and setting time were evaluated to explain the desorption behavior of SAPs. SAP absorption generally increased in pastes with glass powders. The desorption rate of SAPs in different pastes was shown to correlate with the onset of solid skeleton development in the pastes. The addition of SAPs reduced autogenous shrinkage in neat cement paste more than in pastes with glass powders.
Outcome after Interdisciplinary Treatment for Aneurysmal Subarachnoid Hemorrhage—A Single Center Experience
Authors: Voellger Benjamin , Rupa Rosita , Arndt Christian , Carl Barbara , Nimsky Christopher
Published: November 2019

Background and Objectives: To identify predictors of outcome after aneurysmal subarachnoid hemorrhage (aSAH) in our interdisciplinary setting. Materials and Methods: 176 patients who had been treated for aSAH by a team of neurosurgeons and neuroradiologists between 2009 and 2017 were analyzed retrospectively. Age, gender, clinical presentation according to the Hunt and Hess (H&H) grading on admission, overall clot burden, aneurysm localization, modality of aneurysm obliteration, early deterioration (ED), occurrence of vasospasm in transcranial Doppler ultrasonography, delayed cerebral ischemia (DCI), spasmolysis, decompressive craniectomy (DC), cerebrospinal fluid (CSF) shunt placement, deep vein thrombosis (DVT), pulmonary embolism (PE), severe cardiac events (SCE), mortality on Days 14, and 30 after admission, and outcome at one year after the hemorrhage according to the Glasgow Outcome Scale (GOS) were recorded. Chi square, Fisher’s exact, Welch’s t, and Wilcoxon rank sum served as statistical tests. Generalized linear models were fitted, and ordered logistic regression was performed. Results: SCE (p = 0.049) were a significant predictor of mortality at 14 days after aSAH, but not later during the first year after the hemorrhage. Clipping as opposed to coiling (p = 0.049) of ruptured aneurysms was a significant predictor of survival on Day 30 after aSAH, but not later during the first year after the hemorrhage, while coiling as opposed to clipping of ruptured aneurysms was significantly related to a lower frequency of DVT during hospitalization (p = 0.024). Aneurysms of the anterior circulation were significantly more often clipped, while aneurysms of the posterior circulation were significantly more often coiled (p < 0.001). Age over 70 years (p = 0.049), H&H grade on admission (p = 0.022), overall clot burden (p = 0.035), ED (p = 0.009), DCI (p = 0.013), DC (p = 0.0005), and CSF shunt placement (p = 0.038) proved to be predictive of long-term outcome after aSAH. Conclusion: Long-term results after clipping and coiling of ruptured aneurysms appear equal in an interdisciplinary setting that takes aneurysm localization, available staff, and equipment into account.
On the Use of MOFs and ALD Layers as Nanomembranes for the Enhancement of Gas Sensors Selectivity
Authors: Weber Matthieu , Graniel Octavio , Balme Sebastien , Miele Philippe , Bechelany Mikhael
Published: November 2019

Improving the selectivity of gas sensors is crucial for their further development. One effective route to enhance this key property of sensors is the use of selective nanomembrane materials. This work aims to present how metal-organic frameworks (MOFs) and thin films prepared by atomic layer deposition (ALD) can be applied as nanomembranes to separate different gases, and hence improve the selectivity of gas sensing devices. First, the fundamentals of the mechanisms and configuration of gas sensors will be given. A selected list of studies will then be presented to illustrate how MOFs and ALD materials can be implemented as nanomembranes and how they can be implemented to improve the operational performance of gas sensing devices. This review comprehensively shows the benefits of these novel selective nanomaterials and opens prospects for the sensing community.
Nanoparticles (NPs) of WO3-x Compounds by Polyol Route with Enhanced Photochromic Properties
Authors: Bourdin Marie , Gaudon Manuel , Weill François , Duttine Mathieu , Gayot Marion , Messaddeq Younes , Cardinal Thierry
Published: November 2019

Tungsten trioxide (WO3) is well-known as one of the most promising chromogenic compounds. It has a drastic change of coloration induced from different external stimuli and so its applications are developed as gas sensors, electrochromic panels or photochromic sensors. This paper focuses on the photochromic properties of nanoWO3, with tunable composition (with tunable oxygen sub-stoichiometry). Three reference samples with yellow, blue and black colors were prepared from polyol synthesis followed by post annealing under air, none post-annealing treatment, or a post-annealing under argon atmosphere. These three samples differ in terms of crystallographic structure (cubic system versus monoclinic system), oxygen vacancy concentration, electronic band diagram with occurrence of free or trapped electrons and their photochromic behavior. Constituting one main finding, it is shown that the photochromic behavior is highly dependent on the compound’s composition/color. Rapid and important change of coloration under UV (ultraviolet) irradiation was evidenced especially on the blue compound, i.e., the photochromic coloring efficiency of this compound in terms of contrast between bleached and colored phase, as the kinetic aspect is high. The photochromism is reversible in a few hours. This hence opens a new window for the use of tungsten oxide as smart photochromic compounds.
Synthesis of Multicolor Carbon Dots Based on Solvent Control and Its Application in the Detection of Crystal Violet
Authors: Zhao Dan , Liu Xuemei , Zhang Zhixia , Zhang Rui , Liao Liangxiu , Xiao Xincai , Cheng Han
Published: November 2019

The adjustment of the emitting wavelength of carbon dots (CDs) is usually realized by changing the raw materials, reaction temperature, or time. This paper reported the effective synthesis of multicolor photoluminescent CDs only by changing the solvent in a one-step solvothermal method, with 1,2,4,5-tetraaminobenzene as both the novel carbon source and nitrogen source. The emission wavelengths of the as-prepared CDs ranged from 527 to 605 nm, with quantum yields (QYs) reaching 10.0% to 47.6%, and it was successfully employed as fluorescence ink. The prepared red-emitting CDs (R-CDs, λem = 605 nm) and yellow-emitting CDs (Y-CDs, λem = 543 nm) were compared through multiple characterization methods, and their luminescence mechanism was studied. It was discovered that the large particle size, the existence of graphite Ns, and oxygen-containing functional groups are beneficial to the formation of long wavelength-emitting CDs. Y-CDs responded to crystal violet, and its fluorescence could be quenched. This phenomenon was thus employed to develop a detection method for crystal violet with a linear range from 0.1 to 11 µM and a detection limit of 20 nM.
Evidence for and against Liquid-Liquid Phase Separation in the Nucleus
Authors: A Peng , Weber Stephanie C.
Published: November 2019

Enclosed by two membranes, the nucleus itself is comprised of various membraneless compartments, including nuclear bodies and chromatin domains. These compartments play an important though still poorly understood role in gene regulation. Significant progress has been made in characterizing the dynamic behavior of nuclear compartments and liquid-liquid phase separation (LLPS) has emerged as a prominent mechanism governing their assembly. However, recent work reveals that certain nuclear structures violate key predictions of LLPS, suggesting that alternative mechanisms likely contribute to nuclear organization. Here, we review the evidence for and against LLPS for several nuclear compartments and discuss experimental strategies to identify the mechanism(s) underlying their assembly. We propose that LLPS, together with multiple modes of protein-nucleic acid binding, drive spatiotemporal organization of the nucleus and facilitate functional diversity among nuclear compartments.
PCL-ZnO/TiO2/HAp Electrospun Composite Fibers with Applications in Tissue Engineering
Authors: Jinga Sorin-Ion , Zamfirescu Andreea-Ioana , Voicu Georgeta , Enculescu Monica , Evanghelidis Alexandru , Busuioc Cristina
Published: November 2019

The main objective of the tissue engineering field is to regenerate the damaged parts of the body by developing biological substitutes that maintain, restore, or improve original tissue function. In this context, by using the electrospinning technique, composite scaffolds based on polycaprolactone (PCL) and inorganic powders were successfully obtained, namely: zinc oxide (ZnO), titanium dioxide (TiO2) and hydroxyapatite (HAp). The novelty of this approach consists in the production of fibrous membranes based on a biodegradable polymer and loaded with different types of mineral powders, each of them having a particular function in the resulting composite. Subsequently, the precursor powders and the resulting composite materials were characterized by the structural and morphological point of view in order to determine their applicability in the field of bone regeneration. The biological assays demonstrated that the obtained scaffolds represent support that is accepted by the cell cultures. Through simulated body fluid immersion, the biodegradability of the composites was highlighted, with fiber fragmentation and surface degradation within the testing period.
Wasted Ganoderma tsugae Derived Chitosans for Smear Layer Removal in Endodontic Treatment
Authors: Huang Sheng-Tung , Teng Nai-Chia , Wang Hsin-Hui , Hsieh Sung-Chih , Yang Jen-Chang
Published: November 2019

The objective of this study is to investigate the synergistic effects of acid etching and metal-ion chelation in dental smear layer removal using wasted Ganoderma tsugae derived chitosans. The wasted Ganoderma tsugae fruiting body was used to prepare both acid-soluble fungal chitosan (FCS) and alkali-soluble polysaccharide (ASP). To explore the effective irrigant concentration for smear layer removal, a chelating effect on ferrous ions was conducted. Specimens of various concentrations of EDTA, citric acid, and polysaccharide solutions were reacted with FerroZine™ then the absorbance was examined at 562 nm by a UV-visible spectrophotometer to calculate their metal chelating capability. Twenty extracted premolars were instrumented and individually soaked in the solutions of 15 wt% EDTA, 10 wt% citric acid, 0.04 wt% ASP, 0.04 wt% FCS, and normal saline were randomly divided into five groups (N=4). Next, each tooth was cleaved longitudinally and examined by scanning electron microscopy (SEM) to assay the effectiveness of smear layer removal. The chelating capability for EDTA, FCS, and ASP showed no significant difference over the concentration of 0.04 wt% (p > 0.05). The SEM results showed that 0.04 wt% FCS solution was effective in smear layer removal along the canal wall. These results indicated that Ganoderma tsuage derived FCS in acid solutions could be a potential alternative as a root canal irrigant solution due to its synergistic effect.
Polypharmacy and Depressive Symptoms in U.S.-Born Mexican American Older Adults
Authors: Assari Shervin , Wisseh Cheryl , Saqib Mohammed , Helmi Hamid , Bazargan Mohsen
Published: November 2019

Background: Although some studies have suggested a link between polypharmacy and poor mental health, less is known about the association between polypharmacy and depressive symptomology among U.S.-born older Mexican Americans. Aim: This study aimed to test the association between polypharmacy and depressive symptoms in U.S.-born older Latino Americans. Materials and methods: Data came from the Sacramento Area Latino Study on Aging (SALSA 2008). A total of 691 U.S.-born older (age >= 65) Mexican Americans entered this analysis. Polypharmacy was the independent variable. Level of depressive symptoms was the outcome. Age, gender, socioeconomic status (education, income, and employment), retirement status, health (chronic medical conditions, self-rated health, and activities of daily living), language, acculturation, and smoking were the covariates. A linear regression model was used to analyze the data. Results: We found a positive association between polypharmacy and depressive symptoms, which was above and beyond demographic factors, socioeconomic status, physical health, health behaviors, language, acculturation, and health insurance. Conclusion: Polypharmacy is linked to depressive symptoms in U.S.-born older Mexican Americans. More research is needed to test the effects of reducing inappropriate polypharmacy on mental well-being of first and second generation older Mexican Americans. There is also a need to study the role of drug-drug interaction in explaining the observed link between polypharmacy and depressive symptoms.
Sea Ice Remote Sensing Using GNSS-R: A Review
Authors: Yan Qingyun , Huang Weimin
Published: November 2019

Knowledge of sea ice is critical for offshore oil and gas exploration, global shipping industries, and climate change studies. During recent decades, Global Navigation Satellite System-Reflectometry (GNSS-R) has evolved as an efficient tool for sea ice remote sensing. In particular, thanks to the availability of the TechDemoSat-1 (TDS-1) data over high-latitude regions, remote sensing of sea ice based on spaceborne GNSS-R has been rapidly growing. The goal of this paper is to provide a review of the state-of-the-art methods for sea ice remote sensing offered by the GNSS-R technique. In this review, the fundamentals of these applications are described, and their performances are evaluated. Specifically, recent progress in sea ice sensing using TDS-1 data is highlighted including sea ice detection, sea ice concentration estimation, sea ice type classification, sea ice thickness retrieval, and sea ice altimetry. In addition, studies of sea ice sensing using airborne and ground-based data are also noted. Lastly, applications based on various platforms along with remaining challenges are summarized and possible future trends are explored. In this review, concepts, research methods, and experimental techniques of GNSS-R-based sea ice sensing are delivered, and this can benefit the scientific community by providing insights into this topic to further advance this field or transfer the relevant knowledge and practice to other studies.