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https://www.readbyqxmd.com/read/28319832/comparative-life-cycle-cost-assessment-of-painted-and-hot-dip-galvanized-bridges
#1
B Rossi, S Marquart, G Rossi
The study addresses the life cycle cost assessment (LCCA) of steel bridges, focusing on the maintenance activities and the maintenance scenario. Firstly, the unit costs of maintenance activities and their durability (i.e. the time between two activities) are evaluated. Pragmatic data are provided for the environment category C4 and for three activities: Patch Up, Overcoating and Remove & Replace. A comparative LCCA for a typical hypothetic steel girder bridge is carried out, either painted or hot-dip galvanized (HDG), in the environmental class C4...
March 17, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28319719/year-round-phytofiltration-lagoon-assessment-using-pistia-stratiotes-within-a-pilot-plant-scale-biorefinery
#2
Eugenia J Olguín, Daniel A García-López, Ricardo E González-Portela, Gloria Sánchez-Galván
Phytofiltration lagoons are phytoremediation technologies suitable for tropical and sub-tropical regions requiring cost-effective and echo-friendly technologies. A biorefinery of fourth generation has been implemented at pilot plant level in Xalapa, Mexico, and the phytofiltration lagoon, being the first module for provision of treated water and plant biomass for biofuel production plays a key role. The aim of this work was to evaluate the performance of such phytofiltration lagoon with a working volume of 13,000 L for the removal of nutrients from an urban river polluted with domestic wastewater and the biomass productivity of the macrophyte Pistia stratiotes, during five different experimental periods, comprising 42 days each one...
March 16, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28318224/defects-mediated-corrosion-in-graphene-coating-layer
#3
Jincheng Lei, Yaowu Hu, Zishun Liu, Gary J Cheng, Kejie Zhao
Mixed results were reported on the anticorrosion of graphene coated metal surfaces - while graphene serves as an effective short-term barrier against corrosion and oxidation due to its low permeability to gases, the galvanic cell between graphene and metal substrate facilitates extensive corrosion in the long run. Defects in the graphene layer provide pathways for the permeation of oxidizing species. We study the role of defects in graphene in the anticorrosion using first-principles theoretical modeling. Experiments in the highly reactive environment indicate that the oxidized products primarily distribute along the grain boundaries of graphene...
March 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28301543/inflammation-biomarkers-in-blood-as-mortality-predictors-in-community-acquired-pneumonia-admitted-patients-importance-of-comparison-with-neutrophil-count-percentage-or-neutrophil-lymphocyte-ratio
#4
Jose Curbelo, Sergio Luquero Bueno, José María Galván-Román, Mara Ortega-Gómez, Olga Rajas, Guillermo Fernández-Jiménez, Lorena Vega-Piris, Francisco Rodríguez-Salvanes, Belén Arnalich, Ana Díaz, Ramón Costa, Hortensia de la Fuente, Ángel Lancho, Carmen Suárez, Julio Ancochea, Javier Aspa
INTRODUCTION: The increase and persistence of inflammation in community-acquired pneumonia (CAP) patients can lead to higher mortality. Biomarkers capable of measuring this inadequate inflammatory response are likely candidates to be related with a bad outcome. We investigated the association between concentrations of several inflammatory markers and mortality of CAP patients. MATERIAL AND METHODS: This was a prospective study of hospitalised CAP patients in a Spanish university hospital...
2017: PloS One
https://www.readbyqxmd.com/read/28298978/can-galvanic-skin-conductance-be-used-as-an-objective-indicator-of-children-s-anxiety-in-the-dental-setting
#5
Ebrahim Najafpour, Naser Asl-Aminabadi, Sara Nuroloyuni, Zahra Jamali, Sajjad Shirazi
BACKGROUND: Assessment of procedural distress is essential at assisting children during invasive dental treatments. This study aimed to determine the validity and reliability of galvanic skin response as a measure for assessment of dental anxiety in children. MATERIAL AND METHODS: 151 children, aged 5-7 years, participated in this study. Similar dental treatments were rendered to all subjects. At the beginning and end of the session, modified child dental anxiety scale (MCDAS), clinical anxiety rating scale (CARS) and galvanic skin response (GSR) were used to determine children's anxiety...
March 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28296197/engineering-bimetallic-ag-cu-nanoalloys-for-highly-efficient-oxygen-reduction-catalysts-a-guideline-for-designing-ag-based-electrocatalysts-with-activity-comparable-to-pt-c-20
#6
Xiaoqiang Wu, Fuyi Chen, Nan Zhang, Adnan Qaseem, Roy L Johnston
Development of highly active and stable Pt-free oxygen reduction reaction catalysts from earth-abundant elements remains a grand challenge for highly demanded metal-air batteries. Ag-based alloys have many advantages over platinum group catalysts due to their low cost, high stability, and acceptable oxygen reduction reaction (ORR) performance in alkaline solutions. Nevertheless, compared to commercial Pt/C-20%, their catalytic activity still cannot meet the demand of commercialization. In this study, a kind of catalysts screening strategy on Agx Cu100-x nanoalloys is reported, containing the surface modification method, studies of activity enhancement mechanism, and applied research on zinc-air batteries...
March 15, 2017: Small
https://www.readbyqxmd.com/read/28295949/portosystemic-shunt-as-a-bridge-to-liver-transplantation-in-infants-a-comparison-of-two-techniques
#7
Dor Yoeli, N Thao N Galván, Daniel J Ashton, Kayla R Kumm, Michael L Kueht, Ellen D Witte, Tamir A Miloh, Ronald T Cotton, Abbas Rana, Christine A O'Mahony, John A Goss
Portosystemic shunts can serve as a bridge to liver transplantation in patients with end-stage liver disease by providing portal decompression to treat life-threatening variceal bleeding and prevent recurrent episodes until an organ becomes available. The conventional TIPS procedure, however, is technically challenging to perform in infants due to the small size of their intrahepatic vasculature. We report two cases of emergent creation of portosystemic shunts as a bridge to liver transplantation in infants with life-threatening variceal bleeding using a conventional TIPS technique in the first case and a percutaneous DIPS technique in the other...
March 13, 2017: Pediatric Transplantation
https://www.readbyqxmd.com/read/28289861/expression-patterns-of-programmed-death-ligand-1-in-esophageal-adenocarcinomas-comparison-between-primary-tumors-and-metastases
#8
Bastian Dislich, Alexandra Stein, Christian A Seiler, Dino Kröll, Sabina Berezowska, Inti Zlobec, José Galvan, Julia Slotta-Huspenina, Axel Walch, Rupert Langer
Expression analysis of programmed death-ligand 1 (PD-L1) may be helpful in guiding clinical decisions for immune checkpoint inhibition therapy, but testing by immunohistochemistry may be hampered by heterogeneous staining patterns within tumors and expression changes during metastatic course. PD-L1 expression (clone SP142) was investigated in esophageal adenocarcinomas using tissue microarrays (TMA) from 112 primary resected tumors, preoperative biopsies and full slide sections from a subset of these cases (n = 24), corresponding lymph node (n = 55) and distant metastases (n = 17)...
March 13, 2017: Cancer Immunology, Immunotherapy: CII
https://www.readbyqxmd.com/read/28279917/at-risk-of-being-risky-the-relationship-between-brain-age-under-emotional-states-and-risk-preference
#9
Marc D Rudolph, Oscar Miranda-Domínguez, Alexandra O Cohen, Kaitlyn Breiner, Laurence Steinberg, Richard J Bonnie, Elizabeth S Scott, Kim Taylor-Thompson, Jason Chein, Karla C Fettich, Jennifer A Richeson, Danielle V Dellarco, Adriana Galván, B J Casey, Damien A Fair
Developmental differences regarding decision making are often reported in the absence of emotional stimuli and without context, failing to explain why some individuals are more likely to have a greater inclination toward risk. The current study (N=212; 10-25y) examined the influence of emotional context on underlying functional brain connectivity over development and its impact on risk preference. Using functional imaging data in a neutral brain-state we first identify the "brain age" of a given individual then validate it with an independent measure of cortical thickness...
February 1, 2017: Developmental Cognitive Neuroscience
https://www.readbyqxmd.com/read/28278482/all-digital-galvanically-coupled-bcc-receiver-resilient-to-frequency-misalignment
#10
Pengpeng Chen, Huazhong Yang, Rong Luo, Bo Zhao
It is promising for wearable devices to go to a miniature size to alleviate the load of human body. One way to miniaturize the communication nodes on human body is to remove the bulky components such as antenna and crystal. Galvanically-coupled body channel communication (GC-BCC) has a great advantage over conventional wireless communications in reducing the size of wearable devices because it reuses the monitoring electrodes for signal transmission in place of antennas. To remove the crystal as well, the receiver must be immune to different types of frequency misalignments...
March 2, 2017: IEEE Transactions on Biomedical Circuits and Systems
https://www.readbyqxmd.com/read/28277961/discrimination-factors-and-incorporation-rates-for-organic-matrix-in-shark-teeth-based-on-a-captive-feeding-study
#11
S S Zeichner, A S Colman, P L Koch, C Polo-Silva, F Galván-Magaña, S L Kim
Sharks migrate annually over large distances and occupy a wide variety of habitats, complicating analysis of lifestyle and diet. A biogeochemical technique often used to reconstruct shark diet and environment preferences is stable isotope analysis, which is minimally invasive and integrates through time and space. There are previous studies that focus on isotopic analysis of shark soft tissues, but there are limited applications to shark teeth. However, shark teeth offer an advantage of multiple ecological snapshots and minimum invasiveness during removal because of their distinct conveyor belt tooth replacement system...
March 2017: Physiological and Biochemical Zoology: PBZ
https://www.readbyqxmd.com/read/28276193/assessment-of-corrosion-in-retrieved-spine-implants
#12
V C Panagiotopoulou, H S Hothi, H A Anwar, S Molloy, H Noordeen, K Rezajooi, J Sutcliffe, J A Skinner, A J Hart
Recently the use of dissimilar metals in spine instrumentation has increased, especially in the case of adult deformities, where rods made from Cobalt Chrome alloys (CoCr) are used with Titanium (Ti) screws. The use of dissimilar metals increases the risk of galvanic corrosion and patients have required revision spine surgery due to severe metallosis that may have been caused by corrosion. We aimed to assess the presence of corrosion in spine implant retrievals from constructs with two types of material combinations: similar (Ti/Ti) and dissimilar (CoCr/Ti)...
March 9, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28273606/an-impressive-choledochal-cyst-and-its-surgical-resection
#13
Nhu Thao Nguyen Galván, Kayla Kumm, Dor Yoeli, Ellen Witte, Michael Kueht, Ronald Timothy Cotton, Abbas Rana, Christine A O'Mahony, John A Goss
INTRODUCTION: Choledochal cysts are rare congenital dilations of the biliary tree that can present with non-specific symptoms such as abdominal pain, jaundice, cholelithiasis and pancreatitis. Although most commonly identified in children, they can be found in the adult population. However, because of the non-specific symptoms, this diagnosis may be difficult to make in the adult. A physician therefore must keep this diagnosis within their differential, as it may arise in an unexpected patient population who may present with a convoluted work up...
February 21, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28272368/use-of-wearable-sensors-and-biometric-variables-in-an-artificial-pancreas-system
#14
Kamuran Turksoy, Colleen Monforti, Minsun Park, Garett Griffith, Laurie Quinn, Ali Cinar
An artificial pancreas (AP) computes the optimal insulin dose to be infused through an insulin pump in people with Type 1 Diabetes (T1D) based on information received from a continuous glucose monitoring (CGM) sensor. It has been recognized that exercise is a major challenge in the development of an AP system. The use of biometric physiological variables in an AP system may be beneficial for prevention of exercise-induced challenges and better glucose regulation. The goal of the present study is to find a correlation between biometric variables such as heart rate (HR), heat flux (HF), skin temperature (ST), near-body temperature (NBT), galvanic skin response (GSR), and energy expenditure (EE), 2D acceleration-mean of absolute difference (MAD) and changes in glucose concentrations during exercise via partial least squares (PLS) regression and variable importance in projection (VIP) in order to determine which variables would be most useful to include in a future artificial pancreas...
March 7, 2017: Sensors
https://www.readbyqxmd.com/read/28271069/hypofibrinolytic-state-in-subjects-with-type-2-diabetes-mellitus-aggravated-by-the-metabolic-syndrome-before-clinical-manifestations-of-atherothrombotic-disease
#15
Elsa Aburto-Mejía, David Santiago-Germán, Manuel Martínez-Marino, María Eugenia Galván-Plata, Eduardo Almeida-Gutiérrez, Mardia López-Alarcón, Jesús Hernández-Juárez, Antonio Alvarado-Moreno, Alfredo Leaños-Miranda, Abraham Majluf-Cruz, Irma Isordia-Salas
Background. Metabolic and genetic factors induce plasminogen activator inhibitor type-1 (PAI-1) overexpression; higher PAI-1 levels decrease fibrinolysis and promote atherothrombosis. Aim. To assess PAI-1 antigen levels among subjects with type 2 diabetes mellitus (T2DM) plus Metabolic Syndrome (MetS) before clinical manifestations of atherothrombosis and the contribution of metabolic factors and 4G/5G polymorphism of PAI-1 gene on the variability of PAI-1. Methods. We conducted an observational, cross-sectional assay in a hospital in Mexico City from May 2010 to September 2011...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28269803/an-experimental-analysis-to-monitor-and-manage-stress-among-engineering-students-using-galvanic-skin-response-meter
#16
Anurag Joshi, Ravi Kiran, Ash Narayan Sah
BACKGROUND: This paper studies the impact of musical religious songs (hymns) for managing stress of Indian Engineering students through Galvanic Skin Response (GSR). OBJECTIVE: The objective of the paper is to find out, whether listening to hymns is able to reduce the value of GSR. METHODS: Sample students were selected through initial screening and the students who reported high mental stress during the interview were selected for the main drills...
February 27, 2017: Work: a Journal of Prevention, Assessment, and Rehabilitation
https://www.readbyqxmd.com/read/28269310/driver-drowsiness-detection-using-the-in-ear-eeg
#17
Taeho Hwang, Miyoung Kim, Seunghyeok Hong, Kwang Suk Park
Driver drowsiness monitoring is one of the most demanded technologies for active prevention of severe road accidents. Electroencephalogram (EEG) and several peripheral signals have been suggested for the drowsiness monitoring. However, each type of signal has partial limitations in terms of either convenience or accuracy. Recent emerged concept of in-ear EEG raises expectations due to reduced obtrusiveness. It is yet unclear whether the in-ear EEG is effective enough for drowsiness detection in comparison with on-scalp EEG or peripheral signals...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269299/a-pilot-study-on-the-neurometric-evaluation-of-effective-and-ineffective-antismoking-public-service-announcements
#18
Giulia Cartocci, Enrica Modica, Dario Rossi, Anton Giulio Maglione, Isotta Venuti, Giulia Rossi, Elena Corsi, Fabio Babiloni
Tobacco use is the leading cause of preventable death and smoking-related illness worldwide. Research has shown that antismoking advertising may help reduce this habit. Nowadays, public service announcements (PSAs) are considered "Effective" or "Ineffective" on the base of official reports concerning behavioral/attitudinal changes toward healthier patterns and health-related savings following the exposure to the PSA. In this pilot study, we described the results of the use of three neurometric indexes for the evaluation of the efficacy of a couple of antismoking PSAs in a reduced sample of voluntary participants...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28265294/the-bare-head-of-the-northern-bald-ibis-geronticus-eremita-fulfills-a-thermoregulatory-function
#19
REVIEW
Ismael Galván, Daniel Palacios, Juan José Negro
BACKGROUND: Dark pigments provide animals with several adaptive benefits such as protection against ultraviolet (UV) radiation and mechanical abrasion, but may also impose several constraints like a high absorbance of solar radiation. Endotherms, with relatively constant and high body temperatures, may be especially prone to thermoregulatory limitations if dark coloured and inhabiting hot environments. It is therefore expected that adaptations have specifically evolved because of these limitations...
2017: Frontiers in Zoology
https://www.readbyqxmd.com/read/28258269/ion-release-and-galvanic-corrosion-of-different-orthodontic-brackets-and-wires-in-artificial-saliva
#20
Soodeh Tahmasbi, Tahereh Sheikh, Yasamin B Hemmati
INTRODUCTION: To investigate the galvanic corrosion of brackets manufactured by four different companies coupled with stainless steel (SS) or nickel-titanium (NiTi) wires in an artificial saliva solution. MATERIALS AND METHODS: A total of 24 mandibular central incisor Roth brackets of four different manufacturers (American Orthodontics, Dentaurum, Shinye, ORJ) were used in this experimental study. These brackets were immersed in artificial saliva along with SS or NiTi orthodontic wires (0...
March 1, 2017: Journal of Contemporary Dental Practice
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