keyword
MENU ▼
Read by QxMD icon Read
search

statistical mechanics

keyword
https://www.readbyqxmd.com/read/28431416/caring-for-critically-injured-children-an-analysis-of-56-pediatric-damage-control-laparotomies
#1
Miguel A Villalobos, Joshua P Hazelton, Rachel L Choron, Lisa Capano-Wehrle, Krystal Hunter, John P Gaughan, Steven E Ross, Mark J Seamon
BACKGROUND: Injury is the leading cause of death in children under 18 years. Damage control principles have been extensively studied in adults but remain relatively unstudied in children. Our primary study objective was to evaluate the use of damage control laparotomy (DCL) in critically injured children. METHODS: An American College of Surgeons-verified Level 1 trauma center review (1996-2013) of pediatric trauma laparotomies was undertaken. Exclusion criteria included: age older than 18 years, laparotomy for abdominal compartment syndrome or delayed longer than 2 hours after admission...
May 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28431361/uncertainty-quantification-and-validation-of-3d-lattice-scaffolds-for-computer-aided-biomedical-applications
#2
Recep M Gorguluarslan, Seung-Kyum Choi, Christopher J Saldana
A methodology is proposed for uncertainty quantification and validation to accurately predict the mechanical response of lattice structures used in the design of scaffolds. Effective structural properties of the scaffolds are characterized using a developed multi-level stochastic upscaling process that propagates the quantified uncertainties at strut level to the lattice structure level. To obtain realistic simulation models for the stochastic upscaling process and minimize the experimental cost, high-resolution finite element models of individual struts were reconstructed from the micro-CT scan images of lattice structures which are fabricated by selective laser melting...
April 12, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28430816/possible-increase-in-insulin-resistance-and-concealed-glucose-coupled-potassium-lowering-mechanisms-during-acute-coronary-syndrome-documented-by-covariance-structure-analysis
#3
Satoshi Ito, Tomohisa Nagoshi, Kosuke Minai, Yusuke Kashiwagi, Hiroshi Sekiyama, Akira Yoshii, Haruka Kimura, Yasunori Inoue, Kazuo Ogawa, Toshikazu D Tanaka, Takayuki Ogawa, Makoto Kawai, Michihiro Yoshimura
OBJECTIVE: Although glucose-insulin-potassium (GIK) therapy ought to be beneficial for ischemic heart disease in general, variable outcomes in many clinical trials of GIK in acute coronary syndrome (ACS) had a controversial impact. This study was designed to examine whether "insulin resistance" is involved in ACS and to clarify other potential intrinsic compensatory mechanisms for GIK tolerance through highly statistical procedure. METHODS AND RESULTS: We compared the degree of insulin resistance during ACS attack and remission phase after treatment in individual patients (n = 104)...
2017: PloS One
https://www.readbyqxmd.com/read/28430795/igm-antibodies-to-oxidized-phosphatidylserine-as-protection-markers-in-cardiovascular-disease-among-60-year-olds
#4
Johan Frostegård, Jun Su, Sudhir Sing, Xiang Hua, Max Vikström, Karin Leander, Bruna Gigante, Ulf de Faire, Anna G Frostegård
OBJECTIVE: Phosphatidylserine is exposed on apoptotic cells and is prone to oxidation (OxPS). Here we analyze the association of IgM antibodies against OxPS (anti-OxPS) with the risk of cardiovascular disease (CVD). METHODS: Among sixty-year olds from Stockholm County in Sweden, previously screened for cardiovascular risk factors (2039 men, 2193 women), there were 210 incident CVD-cases identified during a 5-year follow-up. Using a nested case-control design, 622 age- and sex-matched controls were selected...
2017: PloS One
https://www.readbyqxmd.com/read/28430520/wind-generated-rogue-waves-in-an-annular-wave-flume
#5
A Toffoli, D Proment, H Salman, J Monbaliu, F Frascoli, M Dafilis, E Stramignoni, R Forza, M Manfrin, M Onorato
We investigate experimentally the statistical properties of a wind-generated wave field and the spontaneous formation of rogue waves in an annular flume. Unlike many experiments on rogue waves where waves are mechanically generated, here the wave field is forced naturally by wind as it is in the ocean. What is unique about the present experiment is that the annular geometry of the tank makes waves propagating circularly in an unlimited-fetch condition. Within this peculiar framework, we discuss the temporal evolution of the statistical properties of the surface elevation...
April 7, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28430495/superstatistical-energy-distributions-of-an-ion-in-an-ultracold-buffer-gas
#6
I Rouse, S Willitsch
An ion in a radio frequency ion trap interacting with a buffer gas of ultracold neutral atoms is a driven dynamical system which has been found to develop a nonthermal energy distribution with a power law tail. The exact analytical form of this distribution is unknown, but has often been represented empirically by q-exponential (Tsallis) functions. Based on the concepts of superstatistics, we introduce a framework for the statistical mechanics of an ion trapped in an rf field subject to collisions with a buffer gas...
April 7, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28430472/random-number-generation-with-cosmic-photons
#7
Cheng Wu, Bing Bai, Yang Liu, Xiaoming Zhang, Meng Yang, Yuan Cao, Jianfeng Wang, Shaohua Zhang, Hongyan Zhou, Xiheng Shi, Xiongfeng Ma, Ji-Gang Ren, Jun Zhang, Cheng-Zhi Peng, Jingyun Fan, Qiang Zhang, Jian-Wei Pan
Random numbers are indispensable for a variety of applications ranging from testing physics foundations to information encryption. In particular, nonlocality test provide strong evidence for our current understanding of nature-quantum mechanics. All the random number generators (RNGs) used for the existing tests are constructed locally, making the test results vulnerable to the freedom-of-choice loophole. We report an experimental realization of RNGs based on the arrival time of cosmic photons. The measurement outcomes (raw data) pass the standard NIST statistical test suite...
April 7, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28430083/hydrocephalus-treatment-in-children-long-term-outcome-in-975-consecutive-patients
#8
Pierre-Aurelien Beuriat, Stephanie Puget, Giuseppe Cinalli, Thomas Blauwblomme, Kevin Beccaria, Michel Zerah, Christian Sainte-Rose
OBJECTIVE Hydrocephalus remains one of the more common pathologies managed in pediatric neurosurgical units. Endoscopic third ventriculostomy (ETV) has an advantage over ventriculoperitoneal shunting as it enables patients to remain device free. Multiple shunt devices with various valve designs exist, with no one valve proven to be superior to another. The aim of this study was to describe the management of hydrocephalus and its long-term outcome. METHODS The authors retrospectively reviewed the medical records of all patients who had been treated for hydrocephalus at the Hôpital Necker-Enfants Malades in the period from 1985 to 1995...
April 21, 2017: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/28429967/knee-arthroscopic-surgery-in-middle-aged-patients-with-meniscal-symptoms-a-3-year-follow-up-of-a-prospective-randomized-study
#9
Håkan Gauffin, Sofi Sonesson, Andreas Meunier, Henrik Magnusson, Joanna Kvist
BACKGROUND: The optimal treatment for middle-aged patients with knee pain and meniscal lesions has been extensively debated. Most previous studies have revealed only short-term beneficial results of knee arthroscopic surgery. The authors have previously shown a positive benefit of knee arthroscopic surgery and an exercise program after 1 year when compared with an exercise program alone. PURPOSE: To evaluate if knee arthroscopic surgery combined with an exercise program provided an additional long-term benefit after 3 years compared with an exercise program alone in middle-aged patients with meniscal symptoms...
April 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28429895/interleukin-6-and-resistin-in-relation-to-anthropometric-measurements-in-school-children
#10
Carolina Del Pilar Escalona-Villasmil, Jorymar Yoselyn Leal-Montiel, Pablo Antonio Ortega-Fernindez, Carlos Javier Chavez
The worldwide prevalence of childhood obesity has increased greatly over the past three decades. The increasing occurrence in children of disorders, such as type 2 diabetes, is believed to be a consequence of this obesity epidemic. Although the precise mechanisms are still unclear, dysregulated production or secretion of adipokines caused by excess adipose tissue and adipose tissue dysfunction can contribute to the development of obesity-related me- tabolic diseases. The objective of the study was to determine the serum levels of interleukin-6 and resistin in relation to anthropometric measurements in school children...
June 2016: Investigación Clínica
https://www.readbyqxmd.com/read/28429875/effect-of-untreated-zirconium-oxide-nanofiller-on-the-flexural-strength-and-surface-hardness-of-autopolymerized-interim-fixed-restoration-resins
#11
Abdolhamid Alhavaz, Maryam Rezaei Dastjerdi, Arman Ghasemi, Azade Ghasemi, Abolfazl Alizadeh Sahraei
OBJECTIVE: Autopolymerized poly methyl methacrylate (PMMA) resin is commonly used for the construction of interim restorations; however, it has less than optimal mechanical properties. In this article, we evaluated the reinforcing effect of adding untreated zirconia nanoparticles on the flexural strength and surface hardness of this resin. METHODS: A total of 80 specimens were fabricated. Forty each were used for the flexural strength test and for the surface hardness test...
April 21, 2017: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/28429680/the-inhibitory-effects-of-hydamtiq-a-novel-parp-inhibitor-on-growth-in-human-tumor-cell-lines-with-defective-dna-damage-response-pathways
#12
Enrico Mini, Ida Landini, Laura Lucarini, Andrea Lapucci, Cristina Napoli, Gabriele Perrone, Renato Tassi, Emanuela Masini, Flavio Moroni, Stefania Nobili
The poly(ADP-ribose) polymerase (PARP) enzymes play key roles in the regulation of cellular processes (e.g. DNA damagerepair, genomic stability). It has been shown that PARP inhibitors (PARPIs) are selectively cytotoxic against cells with dysfunctions in genes involved in DNA repair mechanisms (synthetic lethality). Drug induced PARP inhibition potentiates the activity of anticancer drugs such as 5-fluorouracil in enhancing DNA damage, whose repair involves PARP1 activity.The aim of this study was to evaluate the growth inhibitory effects of a novel PARPI, HYDAMTIQ, on human tumor cell lines characterized by different features with regard to DNA damage response pathways (BRCA mutational status, microsatellite status and ATM expression level) and degree of sensitivity/resistance to 5-fluorouracil...
April 20, 2017: Oncology Research
https://www.readbyqxmd.com/read/28429640/spinal-alterations-of-reil-insula-in-alzheimer-s-disease
#13
Foivos E Petrides, Ioannis A Mavroudis, Martha Spilioti, Fotios G Chatzinikolaou, Vasiliki G Costa, Stavros J Baloyannis
Alzheimer's disease (AD) is a progressive neurodegenerative disease that involves numerous cellular and biochemical mechanisms resulting in synaptic alterations and extensive neuronal loss. It is primarily characterized by impairment of memory, associated frequently with mood disorders. Continuous studies have shown that insula may be an important target of AD, but neuropathological alterations have not been described extensively. In the present study, we attempted to describe the morphometric and morphological changes of the spines of Reil insula in AD in comparison with normal aging using a silver impregnation technique...
January 1, 2017: American Journal of Alzheimer's Disease and Other Dementias
https://www.readbyqxmd.com/read/28429407/spinal-cord-injury-induces-widespread-chronic-changes-in-cerebral-white-matter
#14
Tero Ilvesmäki, Eerika Koskinen, Antti Brander, Teemu Luoto, Juha Öhman, Hannu Eskola
Traumatic spinal cord injuries (SCIs) lead to axonal damage at the trauma site, as well as disconnections within the central nervous system. While the exact mechanisms of the long-term pathophysiological consequences of SCIs are not fully understood, it is known that neuronal damage and degeneration are not limited to the direct proximity of the trauma. Instead, the effects can be detected even in the cerebrum. We examined SCI-induced chronic brain changes with a case-control design using 32 patients and 70 control subjects...
April 21, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28429191/melanogenesis-inhibition-in-mice-using-a-low-fluence-1064-nm-q-switched-neodymium-doped-yttrium-aluminum-garnet-laser-a-pilot-study
#15
Jae-Hui Nam, Joon Hong Min, Wang-Kyun Kim, Sunmin Yim, Won-Serk Kim
A low-fluence 1064-nm Q-switched neodymium-doped yttrium aluminum garnet laser, or laser toning, has yielded favorable outcomes in various benign pigmented disorders. However, the exact mechanism of action of laser toning has not been fully elucidated. We sought to determine the inhibitory effect of laser toning on melanogenesis and to assess how laser passes influence the outcomes. To produce perceptible pigmentation, nine HRM-2 melanin-possessing hairless mice were treated with ultraviolet (UV) B radiation on the dorsal skin...
April 20, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28429040/retraction-force-necessary-to-expose-the-mandibular-neck-in-risdon-and-high-cervical-anteroparotid-transmasseteric-approaches-an-anatomic-comparative-study
#16
Jérôme Adnot, Aliosha Feuss, Fabrice Duparc, Olivier Trost
PURPOSE: The purpose of this anatomic study was to compare the retraction force necessary to expose the mandibular neck in the Risdon and the high cervical anteroparotid transmasseteric (HAT) approaches. METHODS: An anatomic study was performed on 18 formalin-embalmed cadavers. We performed a Risdon approach on the left side, and an HAT approach on the right side in all the cases. The subjects were placed in a normative frame and the force necessary to maintain a satisfactory exposure of the condyle was measured with a system of cables, pulleys, and mechanical dynamometer...
April 20, 2017: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/28428848/modeling-activity-patterns-of-wildlife-using-time-series-analysis
#17
Jindong Zhang, Vanessa Hull, Zhiyun Ouyang, Liang He, Thomas Connor, Hongbo Yang, Jinyan Huang, Shiqiang Zhou, Zejun Zhang, Caiquan Zhou, Hemin Zhang, Jianguo Liu
The study of wildlife activity patterns is an effective approach to understanding fundamental ecological and evolutionary processes. However, traditional statistical approaches used to conduct quantitative analysis have thus far had limited success in revealing underlying mechanisms driving activity patterns. Here, we combine wavelet analysis, a type of frequency-based time-series analysis, with high-resolution activity data from accelerometers embedded in GPS collars to explore the effects of internal states (e...
April 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28428827/fundamental-research-on-the-action-mechanism-of-the-800-nm-semiconductor-laser-on-skin-blackheads-and-coarse-pores
#18
Jie Lin, Li Jing, Hao Zhu, Fu-Sheng Dong
The aim of the study was to determine the mechanism of action of the 800 nm semiconductor laser on skin blackheads and coarse pores. A total of 24 healthy purebred short-haired male guinea pigs, weighing 350-400 g, were selected and smeared with 0.5 ml coal tar suspension evenly by injector once daily. Treatment was continued for 14 days to form an experimental area of 8×3 cm on the back of the guinea pigs. The animals were divided into the following groups: Normal control group (NC), low-dose laser treatment group (L-LS), high-dose laser treatment group (H-LS), and Q-switched Nd:YAG treatment group (QC)...
January 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28428742/a-set-based-mixed-effect-model-for-gene-environment-interaction-and-its-application-to-neuroimaging-phenotypes
#19
Changqing Wang, Jianping Sun, Bryan Guillaume, Tian Ge, Derrek P Hibar, Celia M T Greenwood, Anqi Qiu
Imaging genetics is an emerging field for the investigation of neuro-mechanisms linked to genetic variation. Although imaging genetics has recently shown great promise in understanding biological mechanisms for brain development and psychiatric disorders, studying the link between genetic variants and neuroimaging phenotypes remains statistically challenging due to the high-dimensionality of both genetic and neuroimaging data. This becomes even more challenging when studying gene-environment interaction (G×E) on neuroimaging phenotypes...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28428620/formal-definitions-of-unbounded-evolution-and-innovation-reveal-universal-mechanisms-for-open-ended-evolution-in-dynamical-systems
#20
Alyssa Adams, Hector Zenil, Paul C W Davies, Sara Imari Walker
Open-ended evolution (OEE) is relevant to a variety of biological, artificial and technological systems, but has been challenging to reproduce in silico. Most theoretical efforts focus on key aspects of open-ended evolution as it appears in biology. We recast the problem as a more general one in dynamical systems theory, providing simple criteria for open-ended evolution based on two hallmark features: unbounded evolution and innovation. We define unbounded evolution as patterns that are non-repeating within the expected Poincare recurrence time of an isolated system, and innovation as trajectories not observed in isolated systems...
April 20, 2017: Scientific Reports
keyword
keyword
64894
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"