Automatic offline-capable smartphone paper-based microfluidic device for efficient biomarker detection of Alzheimer's disease.

BACKGROUND: Alzheimer's disease (AD) is a prevalent neurodegenerative disease with no effective treatment. Efficient and rapid detection plays a crucial role in mitigating and managing AD progression. Deep learning-assisted smartphone-based microfluidic paper analysis devices (µPADs) offer the advantages of low cost, good sensitivity, and rapid detection, providing a strategic pathway to address large-scale disease screening in resource-limited areas. However, existing smartphone-based detection platforms usually rely on large devices or cloud servers for data transfer and processing. Additionally, the implementation of automated colorimetric enzyme-linked immunoassay (c-ELISA) on µPADs can further facilitate the realization of smartphone µPADs platforms for efficient disease detection. RESULTS: This paper introduces a new deep learning-assisted offline smartphone platform for early AD screening, offering rapid disease detection in low-resource areas. The proposed platform features a simple mechanical rotating structure controlled by a smartphone, enabling fully automated c-ELISA on µPADs. Our platform successfully applied sandwich c-ELISA for detecting the ß-amyloid peptide 1-42 (Aß 1-42, a crucial AD biomarker) and demonstrated its efficacy in 38 artificial plasma samples (healthy: 19, unhealthy: 19, N = 6). Moreover, we employed the YOLOv5 deep learning model and achieved an impressive 97 % accuracy on a dataset of 1824 images, which is 10.16 % higher than the traditional method of curve-fitting results. The trained YOLOv5 model was seamlessly integrated into the smartphone using the NCNN (Tencent's Neural Network Inference Framework), enabling deep learning-assisted offline detection. A user-friendly smartphone application was developed to control the entire process, realizing a streamlined "samples in, answers out" approach. SIGNIFICANCE: This deep learning-assisted, low-cost, user-friendly, highly stable, and rapid-response automated offline smartphone-based detection platform represents a good advancement in point-of-care testing (POCT). Moreover, our platform provides a feasible approach for efficient AD detection by examining the level of Aß 1-42, particularly in areas with low resources and limited communication infrastructure.

Identification of document paper using hybrid feature extraction.

Document forgery is a significant issue in Korea, with around ten thousand cases reported every year. Analyzing paper plays a crucial role in examining questionable documents such as marketable securities and contracts, which can aid in solving criminal cases of document forgery. Paper analysis can also provide essential insights in other types of criminal cases, serving as an important clue for solving cases such as the source of a blackmail letter. The papermaking process generates distinct forming fabric marks and formations, which are critical features for paper classification. These characteristics are observable under transmitted light and are created by the forming fabric pattern and the distribution of pulp fibers, respectively. In this study, we propose a novel approach for paper identification based on hybrid features. This method combines texture features extracted from images converted using the gray-level co-occurrence matrix (GLCM) approach and a convolutional neural network (CNN), with another set of features extracted by the CNN using the same images as input. We applied the proposed method to classification tasks for seven major paper brands available in the Korean market, achieving an accuracy of 97.66%. The results confirm the applicability of this method for visually inspecting paper products and demonstrate its potential for assisting in solving criminal cases involving document forgery.

Spectroscopic Investigations for the Dating of Paper from the Nineteenth Century.

The knowledge of the detailed material composition of paper can help art historians, archivist, librarians, paper historians, and conservators to determine the possible age of a document or a work of art. The dating of paper by the identification of specific paper components is especially applicable to paper from the 19th century. In this era, many changes in the paper production technology occurred and new raw materials were introduced in relatively short time intervals. ATR-IR and Raman spectroscopic measurements were used to analyze the chemical composition and structure of papers from the 19th century. The infrared spectra showed the general material composition of the papers. More specific information on the different paper components and their distribution in the paper were obtained by Raman microscopic measurements. The resulting Raman images visualize the detailed chemical structure of the papers including all components such as paper fibers, filler pigments, sizing agents, and color pigments. Special emphasis was made on the spectroscopic identification of different paper fiber types, like straw, esparto, and sulphite and sulfate chemical wood pulp, which were introduced to paper production during the second half of the 19th century. It could be shown that the specific spectral differences in the Raman spectra of the different paper fiber types are related to different amounts of hemicellulose xylan compounds on or in the cellulose fibers.

Analysis of articles and citation indexes in Chinese Journal of Behavioral Medicine and Brain Science / 中华行为医学与脑科学杂志

Objective:To analyze the changing trend of articles, authors and citation indexes in Chinese Journal of Behavioral Medicine and Brain Science(CJBMBS), so as to provide basis and guidance for further academic quality and editing and proofreading quality improving, and striving to build high-quality scientific and technological journal.Methods:Chinese Medical Journal Network and Wanfang database were used to obtain the information of articles published from 2009 to 2021.The citation indexes of the CJBMBS and the discipline journals of " neurology and psychiatry" were obtained from the natural science volume of the Citation Report (Core Edition) of Chinese Scientific and Technological Journals from 2002 to 2021.All data were analyzed by Excel 2010.Results:The CJBMBS published 187-314 articles per year from 2015 to 2021, and the annual number of articles decreased year by year.The average number of pages per article was 3.66-6.13 pages/article, showing an increasing trend year by year.Since 2015, the CJBMBS set up 3-7 key topics every year, and published 6.4%-16.2% articles of the annual.From 2009 to 2020, the average citation volume of magazine articles was 12.8-27.9, showing an increasing trend year by year.The average number of authors per article was basically stable at 4-6.From 2001 to 2020, the core impact factor of the CJBMBS was 0.188-1.327, with a wave like change and an overall upward trend.The total frequency of core citations was 155-2 836, with a rapid increase from 2001 to 2009, a stable at 2 500 from 2007 to 2017, and a downward trend after 2014.Compared with average level of the core journals of the discipline " neurology and psychiatry" , the core impact factor and the core total citation frequency of the CJBMBS from 2009 to 2020 were both significantly higher.From 2009 to 2020, the fund paper ratio of CJBMBS was 0.42-0.84, showing an upward trend.Conclusion:The citation indexes of CJBMBS are in the forefront of the discipline in recent years.In the future, we should pay more attention to the academic quality of papers and further expand the influence of the journal.

Unsupervised Clustering of Hyperspectral Paper Data Using t-SNE.

For a suspected forgery that involves the falsification of a document or its contents, the investigator will primarily analyze the document's paper and ink in order to establish the authenticity of the subject under investigation. As a non-destructive and contactless technique, Hyperspectral Imaging (HSI) is gaining popularity in the field of forensic document analysis. HSI returns more information compared to conventional three channel imaging systems due to the vast number of narrowband images recorded across the electromagnetic spectrum. As a result, HSI can provide better classification results. In this publication, we present results of an approach known as the t-Distributed Stochastic Neighbor Embedding (t-SNE) algorithm, which we have applied to HSI paper data analysis. Even though t-SNE has been widely accepted as a method for dimensionality reduction and visualization of high dimensional data, its usefulness has not yet been evaluated for the classification of paper data. In this research, we present a hyperspectral dataset of paper samples, and evaluate the clustering quality of the proposed method both visually and quantitatively. The t-SNE algorithm shows exceptional discrimination power when compared to traditional PCA with k-means clustering, in both visual and quantitative evaluations.

Final examination paper analysis of Surgery and Field Surgery in five-year students from comprehensive class of Grade 2014 / 中华医学教育探索杂志

Objective@#To analyze the quality of final exam papers of Surgery and Field Surgery for five-year medical students from comprehensive class of Grade 2014, so as to check the mastery of different students, perfect the construction of item banking, verify the quality of teaching and learning, and thus provide references to further teaching reform.@*Methods@#SPSS 21.0 was used for statistical analysis of 133 Surgery and Field Surgery papers of students from comprehensive class of Grade 2014.@*Results@#The highest score was 93.5, the lowest score was 52.0, and the average score was (70.60±9.00). Among those 133 students, six students were failed, occupying 4.51%. The overall difficulty coefficient of examination paper (P) was 0.71, and P value of multiple choice questions and blank-filling questions was 0.4-0.7. Difference degrees (D) of question types were more than 0.600 and the overall reliability was 0.764. Scores of examination paper were generally in normal distribution. The average scores of students form anesthesiology major were higher than those of students from navigation medicine major, but the average scores of students from above two majors were higher than those of students from psychology major, with statistically significant differences (P<0.05).@*Conclusion@#Question types of this paper are comprehensive and reasonable. The overall difficulty is not high, the difference degree is good, the reliability is good and the score distribution is reasonable. However, the question should be further improved, focusing on the reasonable distribution of difficulty of question. In addition, we should strengthen the teaching of the course in students from psychology major.

Final examination paper analysis of Surgery and Field Surgery in five-year students from comprehensive class of Grade 2014 / 中华医学教育探索杂志

Objective To analyze the quality of final exam papers of Surgery and Field Surgery for five-year medical students from comprehensive class of Grade 2014, so as to check the mastery of different students, perfect the construction of item banking, verify the quality of teaching and learning, and thus provide references to further teaching reform. Methods SPSS 21.0 was used for statistical analysis of 133 Surgery and Field Surgery papers of students from comprehensive class of Grade 2014. Results The highest score was 93.5, the lowest score was 52.0, and the average score was (70.60 ±9.00). Among those 133 students, six students were failed, occupying 4.51％. The overall difficulty coefficient of examination paper (P) was 0.71, and P value of multiple choice questions and blank-filling questions was 0.4-0.7. Difference degrees (D) of question types were more than 0.600 and the overall reliability was 0.764. Scores of examination paper were generally in normal distribution. The average scores of students form anesthesiology major were higher than those of students from navigation medicine major, but the average scores of students from above two majors were higher than those of students from psychology major, with statistically significant differences (P<0.05). Conclusion Question types of this paper are comprehensive and reasonable. The overall difficulty is not high, the difference degree is good, the reliability is good and the score distribution is reasonable. However, the question should be further improved, focusing on the reasonable distribution of difficulty of question . In addition , we should strengthen the teaching of the course in students from psychology major.

Application and evaluation of the S-P chart in analyzing examination papers of nutrition and food hygiene / 中华医学教育探索杂志

Objective To explore the application and evaluation of S-P chart in analyzing examination papers of nutrition and food hygiene and improve the quality of examination.Methods 15 papers were randomly selected from 56 examination papers of nutrition and food hygiene and 5,4,5,1,0 were randomly selected from the students with scores of ＜60,60-69,70-79,80-89,and 90-100 with stratified samplingmethod.S-P chart and fuzzy S-P chart were drawn according to objective and subjective questions.Results In the S-P chart of multiple choice,both the P-curve and S-curve were in the lower right corner.There was no obvious fault on the S-curve,while P-curve had obvious faults.There were 2 questions and 1 student with alarm coefficient ＞ 0.75.The difference,difficulty coefficient,stability coefficient and suitability coefficient were 0.13,0.66,0.55 and 0.58 respectively.In the S-P chart of multiple choices,both the P-curve and S-curve were in the upper left corner.There was no obvious fault on the S-curve,while P-curve had obvious faults.There were 1 question and 1 student with alarm coefficient ＞ 0.75.The difference,difficulty coefficient,stability coefficient and suitability coefficient were 0.10,0.30,0.64 and 0.60 respectively.In the S-P chart of subjective questions,the difference was 0.275,and both the P-curve and S-curve were in the upper left corner and had no obvious fault.Conclusion The application of S-P chart can help teachers to analyze the difference between the quality of test questions and the grade of students,thereby making teaching more targeted and improving the quality of teaching and examination.

Comparison of the traditional and situational choice questions in the physiological examination / 基础医学与临床

Objective Evaluating the effect of situational questions for qualifying the students'abilities in physiolo-gy examination .Methods Comparing the difficulty coefficients and discrimination indexes between situational and traditional choice questions .Results Compared with the traditional choice questions , the difficulty coefficient of situational questions increased , while the discrimination indexes were more reasonable .The discrimination indexes of situational understanding questions were higher than those of the traditional memory and understanding questions . There were no difference between discrimination indexes of the situational application questions and those of tradi -tional application questions .Conclusions Situational questions not only improved the quality of examinations , but also facilitate evaluating students'learning ability .

Examination paper analysis and evaluation of clinical hematology laboratory technique in four-year medical laboratory specialty / 中华医学教育探索杂志

Objective To assess quality of the clinical hematology laboratory technique examination papers and to explore the teaching methods, in order to improve the quality of the course. Methods After gathering 27 clinical hematology laboratory technique theoretical and experimental papers of the first session four-year laboratory medicine students in China Medical University of Grade 2014, we adopted the method of SPSS 19.0 on test scores for statistics of distribution frequency and mean, and applied the corre-lation function formula to calculate the difficulty and discrimination of various types of test questions, and then evaluated the level of knowledge according to the score distribution, and analyzed the quality of the papers based on the difficulty and discrimination. Results The average score of theoretical papers was (76.81±9.12) points, the proposition scheme is reasonable, the overall difficulty was 0.78, and the discrimi-nation is 0.41. The average score of experimental papers was (14.33±1.21) points, the overall difficulty is 0.72, and the discrimination is 0.10. Conclusion The difficulty of the theoretical papers is moderate, equipped with better capacity to discrimination, the difficulty of the experimental papers is also moderate, otherwise with poor discriminatory ability. We should learn from advanced management concept of ISO 15189 and combining professional training requirements of the four-year laboratory medicine , and strengthen students' ability of using theoretical knowledge flexibly to further perfect the mechanism of the experimental exam, improve experimental teaching methods, and finally help further improvement of teaching work.

"The assessment and analysis of the graduation papers of ""3+2"" assistant general practitioners training ""comprehensive clinical course""" / 中华医学教育探索杂志

Objective Based on the objective test (A type) results of the 2014 comprehensive clinical course graduation test of 3+2 assistant general practitioners training,this article analyzed the differences between different teaching units,so as to provide objective basis for improving the teaching level of each unit.Method We established a database with EXCEL 2000,and put each question's ID and points,and the score of each student into the computer,so we could get the difficulty coefficient,distinction degree and reliability of the test paper,and calculate the difficulty coefficient and difference of each question.Then we analyzed the difficulty coefficient,the difference and the reliability of the 122 students' testing results,and compared the accuracy to the same question of the 6 teaching units.Result The objective test's (A type) difficulty coefficient is 0.77,distinction degree is 0.19,and reliability is 0.99.The highest score of the 122 students is 47 points,and the lowest score is 28 points,the average score is (38.5 ± 3.9) points.In the 50 questions,3 questions' difficulty coefficient is less than 0.4,14 questions' difficulty coefficient is between 0.4-0.7,33 questions' difficulty coefficient is above 0.7,so the difficulty degree of the paper is relatively low.In the 50 questions,23 questions' distinction degree is less than 0.15,17 questions' distinction degree is between 0.15-0.30,10 questions' distinction degree is above 0.30,so the distinction degree of the paper is relatively high.In the 50 questions,20 questions' accuracy appears larger differences between each unit:9 questions' accuracy has decreased significantly among 1-2 units,4 questions' accuracy decreased significantly among 3 units,3 questions' accuracy decreased significantly among 4 units,only 1 unit has high accuracy among 2 questions,and 2 questions' accuracy decreased significantly among all units.These problems are related to the teachers' teaching ability,the difficulty in mastering the key points of the curriculum,the lack of the concept of the general practitioners training.Conclusion The design of the examination paper is basically in line with the study purpose and the objectives of the training course.This examination paper was highly reliable,and suitable for the professional theory and ability test.There are site differences between each unit,which can provide an objective basis for improving the teaching level of different teaching unit,and we will solve the problems in the form of collective preparation next step.

A cost-effective Z-folding controlled liquid handling microfluidic paper analysis device for pathogen detection via ATP quantification.

A cost-effective microfluidic paper analysis device (µPAD) was developed with a special Z-folding design for controlling the fluidic flowing and substrate transportation. This presented µPAD can be easily fabricated through wax printing by using a solid ink printer which deposits wax onto the surface of a chromatographic paper, and then baked on a hotplate by penetrating the molten wax into the paper to create a hydrophobic barrier. After µPAD fabrication, liquid control and substrate transportation can be easily carried out by twice folding the µPAD following Z shape. The Z folding made two separated reagent holding zone connected while the detection reaction occurred with the connection. In this paper, a pathogens detection indicated by ATP quantification was took as a proof-in-principle application of using this presented µPAD, the limit of detection (LOD) was 1 µM for ATP detection and 2.6×10(7) CFU/mL for Salmonella live cell detection, which showed a great potential for Point-of-Care Testing (POCT) applications.

Statistical analysis of papers published in Journal of Chinese Behavioral Medicine and Brain Science from 2009 to 2014 / 中华行为医学与脑科学杂志

Objective To analyze the papers published in Journal of Chinese Behavioral Medicine and Brain Science(JCBMBS) from 2009 to 2014 so as to know well of the characteristics of published papers and the progress of the journal.Methods Based on the published magazines,Wanfang database and the Magtech system,bibliometric analysis was conducted to analyze the quantity,types,authors,cooperation,citations and the funds of all the papers published from 2009 to 2014.Results A total of 2 343 papers were published from 2009 to 2014 with the average 390.50 items per year,32.54 items per tissue and 0.34 items per page.It was stable in columns setting and publishing types while the original papers accounted for more than 70％ every year.Zero fund-supported papers decreased year by year and the funds were 1.41-1.83 per article while the ratio of national funds supported papers were 20％-31％.It had a steady author group and the high produced institutions maintained stable.The ratio of cooperation in institutions were 45％-58％.The ratio cooperation in authors were 95.45％-97.09％ and it was high and steady.The citations were 12.45-18.48 per article which increased year by year.Conclusion From 2009 to 2014,the annual published articles on JCBMBS decrease,the paper density decreases and the citations increase year by year.It is relatively steady in columns setting,core authors,ratio of fund-supported papers and cooperation.

Validation and quality control of an ICP-MS method for the quantification and discrimination of trace metals and application in paper analysis: an overview.

Questioned documents analysis includes: handwriting comparison, analysis of the ink and the printer used in the production of the documents, and the physical and chemical characterization of the cellulosic substrate (paper) of the documents. In many situations in life, for financial, social, and personal concerns, we depend on different documents. Therefore, over time, various analytical methods have been developed in order to determine their authenticity, source, and age or to differentiate various papers. In this study a quantitative analytical method for the determination of eight trace level chemical elements (Al, Ba, Fe, Mg, Mn, Pb, Sr, Zn) from document paper samples using inductively coupled plasma-mass spectrometry (ICP-MS) was validated and applied. The evaluation of the performance parameters of the method (applicability, fitness for purpose, linearity, working range, limit of detection and limit of quantification, sensitivity, accuracy, and precision) was accomplished. An overview of the validation parameters are presented and discussed in detail.

Statistical analysis of articles and authors in Journal of Chinese Behavioral Medicine and Brain Science in 2012 / 中华行为医学与脑科学杂志

Objective To analyze the articles and authors published in Journal of Chinese Behavioral Medicine and Brain Science(JCBMBS) in 2012.Methods By using the bibliometric statistical methods,all papers published in JCBMBS in the whole year of 2012 were analyzed,including the paper amount,the paper column,the published style of papers,the institute distributions and the area distributions of the first authors,the foundation supported papers amount,the author amount,the citation amount and the published delay.Results 375 papers were published in JCBMBS in 2012,31.25 papers were published in an average issue,and one article included 3.06 pages averagely.The paper density was 0.327 and the information density was 5.21.The main style of published papers was original article,which accounted for 79.7％,and the least style was experts forum articles,which accounted for 2.4％.The amount of clinical research articles were 129,the hygienic articles were 89 and the basic research articles were 80.The area distributions of the first author were wide and imbalance.The top 6 provinces of the most published paper amounts in 2012 were Shandong,Jiangsu,Guangdong,Beijing,Anhui and Henan,where published paper amounts in total were 207 papers,and accounted for 55.2％ of the total papers of the whole year.There were 244 articles supported by various foundations and accounted for 65.06％ of the total papers of the whole year,in which 30.93％ was supported by the national foundations.The average author amount of the published papers,the average citation amount and the average published delay were 4.71 authors,15.58 indexes and 161.5 days respectively.12 corresponding authors had published 3 or more than 3 articles,and 37 corresponding authors had published 2 articles in the year.The top fifteen institutes of the most paper amounts in the periodical had published 145 articles,accounting for 38.7％ of the total amount of the papers.Conclusion The JCBMBS have an aboundant information resource;the main style of the published papers is original article;the clinical researches are the most in all columns.There are higher foundation supported papers and steady authors of this periodical.

Procedimentos e recursos de ensino para o aluno com deficiência: o que tem sido disseminado nos trabalhos do GT 15 da ANPED sobre estes temas? / Teaching procedures and resources for students with disabilities: what has been presented by anped special education work group on these subjects?

O artigo teve o propósito de analisar os 37 trabalhos que versaram sobre procedimentos e recursos de ensino destinados a alunos com deficiência apresentados no GT 15 de Educação Especial da ANPEd, entre 1996 e 2010. Esses artigos representam 17 por cento do total de 216 trabalhos apresentados nessas 15 reuniões anuais do GT. A perspectiva sociohistórica de Vigotsky fundamentou teoricamente a maioria dos estudos, sobretudos aqueles dedicados à educação de surdos. A população alvo mais estudada foi a de alunos com deficiência intelectual, seguida da surdez, sobretudo no período de 1996 a 2000; estudos dedicados a outras deficiências - física, visual e múltipla - foram menos frequentes. Os estudos descritivos, privilegiando dados qualitativos, envolvendo estudos de caso e etnográficos constituíram a maioria dos trabalhos. Os trabalhos experimentais englobaram delineamentos de grupo e delineamentos intrassujeito. Os estudos foram eloquentes em mostrar a necessidade de o professor observar mais o processo de aprendizagem do que o produto da mesma e a enfatizar o papel essencial da mediação. O processo de desenvolvimento do aluno com deficiência não ocorre da mesma forma que do aluno sem deficiência, não pela condição de deficiência exatamente, mas porque o olhar do outro nem sempre lhe confere a possibilidade para aprender e se desenvolver.

The purpose of this paper was to analyze 37 papers regarding teaching procedures and resources designed for students with special needs presented at ANPEd Special Education Work Group, during the 1996-2000 period. These articles represent 17 percent of the 216 papers presented in the last 15 annual ANPEd meetings. Vygotsky social historical perspective served as the theoretical basis for the majority of the studies, especially those concerning education for the deaf. Students with intellectual disabilities were the target population of most studies, followed by students with deafness, mainly during the 1996-2000 period; papers about physical, visual and multiple disabilities were less frequent. Descriptive studies, focusing on qualitative data, involving both case and ethnographic investigations constitute the majority of the articles. Experimental studies included group design as well as single subject designs. The articles were eloquent in both showing the need for teachers to pay more attention to the learning process than to the product of learning and in emphasizing the critical role of mediation. The development process of students with disabilities does not occur in the same way as their typically developing peers. This occurs mainly because of the lack of learning opportunities given to students with special needs, rather than the disabling condition.

Analysis and evaluation of the human anatomy examination paper / 中华医学教育探索杂志

Objective: In order to sum up the teaching experience and improve the teaching quality.Methods: The human anatomy final examination papers for the students of 2007 majoring in clinical medicine were analysed.Results: The averaged 83.87,showed an appropriate degree of difficulty and discrimination of the examination paper and reasonable scores with negative skew distribution.Conclusions: This analysis as an objective index can be used to evaluate the response of teaching in human anatomy as well as improve the quality of test paper.

Investigation on current situation of introduction to medicine / 中华医学教育探索杂志

Objective To investigate teaching situation of Introduction to Medicine at SJTUSM,and to make more progress in educational reforms. Methods By analyzing questionnaire and test paper,the relevant information was collected and analyzed by SPSS statistics software. Results Teaching the course at SJTUSM was basically satisfactory. Conclusion The investigation showed that the teaching quality of the course is being improved. However,the quality guarantee system of teaching process needs to be further perfected.

Software Design for Paper Quality Analysis / 中华医学教育探索杂志

Paper analysis plays an important role in teaching improvement as well as in its quality enhancement.We have developed a set of software for analyzing paper qualities,which will make paper analysis efficient,practical and standardizing.