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Pulsed γ-ray emission from magnetar 1E 2259+586
Wu, Jason Hung Kit,Hui, Chung Yue,Huang, Regina Hsiu Hui,Kong, Albert Kwok Hing,Cheng, Kwong Sang,Takata, Jumpei,Tam, Pak Hin Thomas,Wu, Eric Man Ho,Liu, Joe 한국우주과학회 2013 Journal of Astronomy and Space Sciences Vol.30 No.2
Anomalous X-ray pulsars (AXPs) are thought to be magnetars which are young isolated neutron stars with extremely strongmagnetic fields of >1014 Gauss. Their tremendous magnetic fields inferred from the spin parameters provide a huge energyreservoir to power the observed X-ray emission. High-energy emission above 0.3 MeV has never been detected despiteintensive search. Here, we present the possible Fermi Large Area Telescope (LAT) detection of γ-ray pulsations above 200MeV from the AXP, 1E 2259+586, which puts the current theoretical models of γ-ray emission mechanisms of magnetars intochallenge. We speculate that the high-energy γ-rays originate from the outer magnetosphere of the magnetar.
Whole-proteome phylogeny of large dsDNA virus families by an alignment-free method.
Wu, Guohong Albert,Jun, Se-Ran,Sims, Gregory E,Kim, Sung-Hou National Academy of Sciences 2009 PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF Vol.106 No.31
<P>The vast sequence divergence among different virus groups has presented a great challenge to alignment-based sequence comparison among different virus families. Using an alignment-free comparison method, we construct the whole-proteome phylogeny for a population of viruses from 11 viral families comprising 142 large dsDNA eukaryote viruses. The method is based on the feature frequency profiles (FFP), where the length of the feature (l-mer) is selected to be optimal for phylogenomic inference. We observe that (i) the FFP phylogeny segregates the population into clades, the membership of each has remarkable agreement with current classification by the International Committee on the Taxonomy of Viruses, with one exception that the mimivirus joins the phycodnavirus family; (ii) the FFP tree detects potential evolutionary relationships among some viral families; (iii) the relative position of the 3 herpesvirus subfamilies in the FFP tree differs from gene alignment-based analysis; (iv) the FFP tree suggests the taxonomic positions of certain 'unclassified' viruses; and (v) the FFP method identifies candidates for horizontal gene transfer between virus families.</P>
Pulsed γ-ray emission from magnetar 1E 2259+586
Jason Hung Kit Wu,허종우,Regina Hsiu Hui Huang,Albert Kwok Hing Kong,Kwong Sang Cheng,Jumpei Takata,Pak Hin Thomas Tam,Eric Man Ho Wu,Joe Liu 한국우주과학회 2013 Journal of Astronomy and Space Sciences Vol.30 No.2
Anomalous X-ray pulsars (AXPs) are thought to be magnetars which are young isolated neutron stars with extremely strong magnetic fields of >1014 Gauss. Their tremendous magnetic fields inferred from the spin parameters provide a huge energy reservoir to power the observed X-ray emission. High-energy emission above 0.3 MeV has never been detected despite intensive search. Here, we present the possible Fermi Large Area Telescope (LAT) detection of γ-ray pulsations above 200MeV from the AXP, 1E 2259+586, which puts the current theoretical models of γ-ray emission mechanisms of magnetars into challenge. We speculate that the high-energy γ-rays originate from the outer magnetosphere of the magnetar.
Peter Liu,Albert Y. Chen,Yin-Nan Huang,Jen-Yu Han,Jihn-Sung Lai,Tzong-Hann Wu,Ming-Chang Wen,Meng-Han Tsai,Shih-Chung Kang 국제구조공학회 2014 Smart Structures and Systems, An International Jou Vol.13 No.6
Civil engineers always face the challenge of uncertainty in planning, building, and maintaininginfrastructure. These works rely heavily on a variety of surveying and monitoring techniques. Unmannedaerial vehicles (UAVs) are an effective approach to obtain information from an additional view, andpotentially bring significant benefits to civil engineering. This paper gives an overview of the state of UAVdevelopments and their possible applications in civil engineering. The paper begins with an introduction toUAV hardware, software, and control methodologies. It also reviews the latest developments in technologiesrelated to UAVs, such as control theories, navigation methods, and image processing. Finally, the paperconcludes with a summary of the potential applications of UAV to seismic risk assessment, transportation,disaster response, construction management, surveying and mapping, and flood monitoring and assessment.
( Elshaday Belay ),( Patrick Kelly ),( Albert Anastasio ),( Niall Cochrane ),( Mark Wu ),( Thorsten Seyler ) 대한고관절학회 2022 Hip and Pelvis Vol.34 No.4
Purpose: Outpatient classified total hip arthroplasty (THA) is a safe option for a select group of patients. An analysis of a national database was conducted to understand the risk factors for unplanned discharge to a skilled nursing facility (SNF) or acute rehabilitation (rehab) after outpatient classified THA. Materials and Methods: A query of the National Surgical Quality Improvement Program (NSQIP) database for THA (Current Procedural Terminology [CPT] 27130) performed from 2015 to 2018 was conducted. Patient demographics, American Society of Anesthesiologists (ASA) classification, functional status, NSQIP morbidity probability, operative time, length of stay (LOS), 30-day reoperation rate, readmission rate, and associated complications were collected. Results: A total of 2,896 patients underwent outpatient classified THA. The mean age of patients was 61.2 years. The mean body mass index (BMI) was 29.6 kg/m2 with median ASA 2. The results of univariate comparison of SNF/rehab versus home discharge showed that a significantly higher percentage of females (58.7% vs. 46.8%), age >70 years (49.3% vs. 20.9%), ASA ≥3 (58.0% vs. 25.8%), BMI >35 kg/m2 (23.3% vs. 16.2%), and hypoalbuminemia (8.0% vs. 1.5%) (P< 0.0001) were discharged to SNF/rehab. The results of multivariable logistic regression showed that female sex (odds ratio [OR] 1.47; P=0.03), age >70 years (OR 3.08; P=0.001), ASA≥3 (OR 2.56; P=0.001), and preoperative hypoalbuminemia (<3.5 g/dL) (OR 3.76; P=0.001) were independent risk factors for SNF/rehab discharge. Conclusion: Risk factors associated with discharge to a SNF/rehab after outpatient classified THA were identified. Surgeons will be able to perform better risk stratification for patients who may require additional postoperative intervention.
Liu, Peter,Chen, Albert Y.,Huang, Yin-Nan,Han, Jen-Yu,Lai, Jihn-Sung,Kang, Shih-Chung,Wu, Tzong-Hann,Wen, Ming-Chang,Tsai, Meng-Han Techno-Press 2014 Smart Structures and Systems, An International Jou Vol.13 No.6
Civil engineers always face the challenge of uncertainty in planning, building, and maintaining infrastructure. These works rely heavily on a variety of surveying and monitoring techniques. Unmanned aerial vehicles (UAVs) are an effective approach to obtain information from an additional view, and potentially bring significant benefits to civil engineering. This paper gives an overview of the state of UAV developments and their possible applications in civil engineering. The paper begins with an introduction to UAV hardware, software, and control methodologies. It also reviews the latest developments in technologies related to UAVs, such as control theories, navigation methods, and image processing. Finally, the paper concludes with a summary of the potential applications of UAV to seismic risk assessment, transportation, disaster response, construction management, surveying and mapping, and flood monitoring and assessment.
Choi, Sun,Jamshidi, Arash,Seok, Tae Joon,Wu, Ming C.,Zohdi, Tarek I.,Pisano, Albert P. American ChemicalSociety 2012 Langmuir Vol.28 No.6
<P>We report a fast, high-throughput method to create size-tunablemicro/nanoparticle clusters via evaporative assembly in picoliter-scaledroplets of particle suspension. Mediated by gravity force and surfacetension force of a contacting surface, picoliter-scale droplets ofthe suspension are generated from a nanofabricated printing head.Rapid evaporative self-assembly of the particles on a hydrophobicsurface leads to fast clustering of micro/nanoparticles and formsparticle clusters of tunable sizes and controlled spacing. The evaporatingbehavior of the droplet is observed in real-time, and the clusteringcharacteristics of the particles are understood based on the physicsof evaporative-assembly. With this method, multiplex printing of variousparticle clusters with accurate positioning and alignment are demonstrated.Also, size-unifomity of the cluster arrays is thoroughly analyzedby examining the metallic nanoparticle cluster-arrays based on surface-enhancedRaman spectroscopy (SERS).</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/langd5/2012/langd5.2012.28.issue-6/la204362s/production/images/medium/la-2011-04362s_0006.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/la204362s'>ACS Electronic Supporting Info</A></P>
PROBABILITY DISTRIBUTION OF CADMIUM PARTITIONING COEFFICIENTS OF CROPLAND SOILS
Chen, Weiping,Chang, Andrew C.,Wu, Laosheng,Li, Lianqing,Kwon, Soon-Ik,Page, Albert L. Williams & Wilkins Co 2007 Soil science Vol.172 No.2
The solution to solid partitioning coefficient (Kd) is an important parameter in assessing the environmental and health risks of potentially toxic metals in soils. Ideally, the metal in solution phase should be determined at the field moisture condition under which the exposures take place. In reality, it is often represented by the concentration in extracts of a given soil-to-water ratio. Using cadmium (Cd) as an example, we demonstrated the uncertainties in determining the soil solution concentrations in cropland soils where the metal contents are only slightly higher than the baselines. Results of extraction experiments showed the Cd concentration of soil solution under simulated field moisture conditions (i.e., water-to-soil ratio of 0.5) tends to be stochastic and follows a normal distribution. The distribution of Kd of two California cropland soils was quantitatively described by a normal probability distribution function. The normal distribution pattern wasfurther validated by data collected in the field. When Kd is characterized in the probabilistic terms, the risks of environmental andhealth harm of metals in the cropland soils may be more appropriately assessed.