775 research outputs found
Exploring the genetic susceptibility of chronic widespread pain: the tender points in genetic association studies
No full textChronic widespread pain (CWP) is a prevalent disorder associated with a low pain threshold and increased levels of psychological distress. Evidence indicates that there is a genetic component to CWP syndromes and pain sensitivity. Here we have identified and reviewed the current literature on genetic association (GA) studies of CWP and pain sensitivity by searching MEDLINE and EMBASE between January 1990 and May 2007. Of the 18 candidate genes studied to date, no definitive susceptibility genes have been identified. This review highlights the key issues for consideration when interpreting the findings from existing studies and in designing future studies to ensure robust and comparable findings in this field. Well-designed GA studies are essential if the genetic component to CWP aetiology is to be fully determined
Complete structural characterization of single carbon nanotubes by Rayleigh scattering circular dichroism
No full textFunding Information: This work was supported by the National Natural Science Foundation of China under grant numbers 52021006 (J. Zhang), 52025023 (K.L.) and 51991342 (K.L.); the Key R&D Programme of Guangdong Province with grant numbers 2020B010189001 (K.L.), 2019B010931001 (K.L.) and 2018B030327001 (K.L.); the National Key R&D Programme of China under grant numbers 2016YFA0300903 (K.L.), 2017YFA0303800 (K.L.) and 2016YFA0300804 (P.G.); the Strategic Priority Research Programme of Chinese Academy of Sciences with grant number XDB33000000 (K.L.); Beijing Natural Science Foundation under grant number JQ19004 (K.L.); Beijing Graphene Innovation Programme under grant number Z181100004818003 (K.L.); the Pearl River Talent Recruitment Programme of Guangdong Province with grant number 2019ZT08C321 (K.L.); National Equipment Programme of China under grant number ZDYZ2015-1 (X.B.); National Postdoctoral Programme for Innovative Talents under award number BX20190016 (C.L.) and China Postdoctoral Science Foundation under award numbers 2019M660280 (C.L.) and 2019M660281 (R.Q.). Publisher Copyright: © 2021, The Author(s), under exclusive licence to Springer Nature Limited.Non-invasive, high-throughput spectroscopic techniques can identify chiral indices (n,m) of carbon nanotubes down to the single-tube level1–6. Yet, for complete characterization and to unlock full functionality, the handedness, the structural property associated with mirror symmetry breaking, also needs to be identified accurately and efficiently7–14. So far, optical methods fail in the handedness characterization of single nanotubes because of the extremely weak chiroptical signals (roughly 10−7) compared with the excitation light15,16. Here we demonstrate the complete structure identification of single nanotubes in terms of both chiral indices and handedness by Rayleigh scattering circular dichroism. Our method is based on the background-free feature of Rayleigh scattering collected at an oblique angle, which enhances the nanotube’s chiroptical signal by three to four orders of magnitude compared with conventional absorption circular dichroism. We measured a total of 30 single-walled carbon nanotubes including both semiconducting and metallic nanotubes and found that their absolute chiroptical signals show a distinct structure dependence, which can be qualitatively understood through tight-binding calculations. Our strategy enables the exploration of handedness-related functionality of single nanotubes and provides a facile platform for chiral discrimination and chiral device exploration at the level of individual nanomaterials.Peer reviewe
Author Correction: Long-range chiral exchange interaction in synthetic antiferromagnets
No full textIn the version of this Article originally published, the sentence ‘D.-S.H. wrote the paper with K.L., J.H. and M.K.’ in the author contributions was incorrect; it should have read ‘D.-S.H. wrote the paper with K.L., J.H., M.-H.J. and M.K.’ This has been corrected in the online versions of the Article
Cyclical Rs-A-Rsh I-V Curve Fitting MATLAB program with I-V curve experimental measurements
No full textMeasurement datasets are attached in Microsoft workbook format, entitled as:
1)Mono70W 999 Irradiance
2)Poly70W 1000 Irradiance
which are the experimentally measured I-V curves for both mono- and poly- crystalline silicon PV modules. The datasets are obtained by connecting the PV Analyzer towards the targetted PV module, placing the PV module directly under the sun, in which such experiment is conducted in the afternoon. The generated reports from the PV Analyzer's software are filtered, and two of the datasets are selected to present in this paper.
Other than the measured specification of the PV module, the datasets also consist three columns of data, which are the voltage, current and power. By plotting these data points accordingly towards x- and y- axis, the experimentally measured I-V and/or P-V curve is obtained.
Total of 2 main programs developed through MATLAB platform are attached, entitled as:
1)IV_Curve_Characterization_Proposed_Model
2)IV_Curve_Characterization_Traditional_Model
which are the I-V curve fitting parameterization algorithm respectively for proposed and traditional mathematical model. The rest of the .m files are coded to complement the features provided in the main programs.
The program entitled "WinOnTop" is obtained from https://www.mathworks.com/matlabcentral/fileexchange/42252-winontop, thus cited as:
Igor (2020). WinOnTop (https://www.github.com/i3v/WinOnTop), GitHub. Retrieved June 6, 2020.
By executing the programs in MATLAB, press the "Load File" button to select the I-V curve dataset. The user can adjust the Rs, A, and Rsh parameters by pressing the interface button, or pressing the "Auto" button to execute the Cyclical Rs-A-Rsh parameterization algorithm that programmed by the author targeting the objective of minimizing the MAEP error between measured and modeled I-V curve. While the three parameters are adjusting, the information will be updated accordingly. When the "Auto" curve-fitting is completed, a report can be generated showing the successive MAEP iteration throughout the curve fitting if the user presses the "OK" button on the generated window.
A folder entitled "Result" is attached, including four .m files and eight .fig files, which all of these are presented in the result section of the paper.
Two main programs entitled:
1)MAEP_Plotter_Mono
2)MAEP_Plotter_Poly
are attached to compare the obtained results. Comparisons are made between the traditional and proposed mathematical models
Agent Angus by K.L. Denman
No full textDenman, K.L. Agent Angus. Victoria: Orca Book Publishers, 2012. Print. An Orca Currents book for reluctant middle school readers, the story follows Angus and his best friend Shahid on their mission to solve a mysterious theft. Canadian author K.L. Denman writes in her usual first-person narrative style with characteristic elements of mystery, science and romance. The story takes place at a school where a stink bomb incident has led to all the students gathering on the front lawn. Right from the book’s introduction (“I’m not a lucky guy. Today luck has chosen to place me next to the one and only Ella Eckles”), readers are taken inside Angus’ head and will be rooting for him along the way. When his crush’s cherished sketchbook goes missing, Angus poses as a mentalist who can solve the crime by reading people. He ‘proves’ his abilities to Ella by pointing out the shifty stink bomb perpetrator right before he is nabbed by the principal. Humorous elements run throughout such as when the boys consider various spy devices (Gordon the ‘too obvious’ robot, a rocket pack launched from a plane, pricey video cameras hidden in smiley face buttons or baseball hats which are not allowed in school, and affordable but oversized rear view sunglasses). Suspense builds as the various suspects are considered. Is the thief their fellow classmate, their art teacher or someone they least suspected? And what could their motive be? This quick read full of spying and intrigue will have readers flipping pages to solve the mystery of the sketchbook and find out if Angus will finally confront the truth. The fluid writing style with varying sentence lengths adds to the drama and pace of the story. This light-hearted story makes a great choice for reluctant readers but lacks deep meaning. It may not appeal to readers who are looking to be challenged. Those looking for a light, easy read will find it enjoyable.Recommended: 3 out of 4 stars Reviewer: Lori Williams Lori Williams has been teaching at Forest Grove School in British Columbia for the past 6 years and feels lucky to be part of a wonderful team of colleagues and students. This year she is teaching grade 5 at Forest Grove and is also a graduate student in the University of Alberta’s Teacher-Librarianship by Distance Learning program
Mosses new to Hong Kong (1)
No full textTen moss species - Garkea flexuosa (Griffith) Marg. & Nork., Campylopus laxitextus Lac., Fissidens dubius P. Beauv., Fissidens ceylonensis Dozy & Molk, Fissidens maceratus Mitt., Philonotis thwaitesii Mitt., Isopterygium minutirameum (C. Muell.)Jaeg., Homalia trichomanoides (Hedw.) B.S.G., Pogonatum neesii (C. Muell.) Dozyand Polytrichum formosum Hedw. are reported new to Hong Kong. Among them, five are new to Guangdong Province of China
Letter from J.P. Bradley to Mr. [William] S. Martin The Dominguez Estate Company, June 28, 1940
No full textRegarding attached payment by Mr. K.L. Schaap settling his account
K.L. 3-8-55
No full textA description of the different studies within the Perceptual Form of the City, a research project investigating the individual’s perception of the urban landscape
Effect of moving dairy cows at different stages of labor on behavior during parturition
No full textCows are often moved from a group to an individual maternity pen just before calving. However, it is unclear whether moving cows during labor may alter their behavior or affect the progress of labor. The aim of this study was to determine if moving cows to a maternity pen at different stages of labor would influence calving behavior or the length of the second stage of labor. Seventy-nine multiparous Holstein dairy cows were moved from 1 of 2 group pens to 1 of 10 maternity pens adjacent to each group pen either 3 d before expected calving date or when one or more behavioral or physical signs of labor were observed. These signs were noted, and were used to retrospectively categorize cows into 1 of 3 movement categories: (1) moved before labor, (2) moved during early stage I labor (signs of suddenly tense and enlarged udder, raised tail or relaxed pelvic ligaments; could also be immediately prelabor), or (3) moved during late stage I labor (signs of viscous, bloody mucus or abdominal contractions; could also be transitioning to stage II labor). Calves were weighed within 12h of birth and remained with their dam for 3 d. The length of the second stage of labor (the time between first abdominal contractions to the delivery the calf) and the total time of abdominal contractions, lying time, and number of position changes from standing to lying made by the cow in the hour before calving were recorded. A single blood sample was taken from the jugular vein of cows 3 to 27h after calving to determine content of haptoglobin, a marker of systemic inflammation. The effect of movement category on length of the second stage of labor and behavioral variables was tested with ANOVA; category was a fixed effect and calf body weight (BW) and cow parity were covariates. The relationship between haptoglobin and the length of the second stage of labor was tested in a model with time of sampling relative to calving as a covariate. Cows moved during late stage I had the longest labor, but did not have longer contractions compared with cows in the other categories. These same cows spent half as much time lying in the 1h before calving compared with cows in the other categories, but did not differ in the number of position changes from standing to lying. We did not have the power to test the effect of movement category on haptoglobin, but cows with longer stage II labor had higher haptoglobin postcalving. Moving cows to a maternity pen during the late part of the first stage of labor caused a delay in the second stage of labor, and this was likely driven by altered lying behavior
Tour of Central Boston - K.L.
No full textNotes taken as part of the Perceptual Form of the City, a research project
investigating the individual’s perception of the urban landscape
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