Physical development and blood composition correlation in adolescents

The goal of the study was to assess the correlation between height and body mass deviations measured with the aid of Z-index in teens and cell component of their peripheral blood. Materials and methods. Apical height was measured in 83 adolescent boys in the course of regular prophylactic medical examination. Z-index was calculated according to WHO Growth Reference, 2007. Cell blood composition was studied with the help of automatic hematologic analyzer. The empiric data was processed statistically using Spearmans correlation coefficient. Results. The analysis of hematologic parameters correlation with deviations of height and bodymass by Z-index has yielded relationship as follows: moderate positive correlation of Hb concentration with bodymass index Z-index, hematocrite with bodymass and height Z-index. Besides there is a mild positive correlation of Hb concentration with bodymass Z-index; RBC number with bodymass and height Z-index, MCV with bodymass and height Z-index. There is no correlation of MCH, MCHC, WBC and Plt number with bodymass and height Z-index. Conclusion. The study has demonstrated there is a correlation between RBC number, Hb concentration and height deviations in case of normochromicity. The relationship ascertained may be explained by an assumption that peculiarities of erythropoiezis correlate with body size. Lower RBC number and Hb concentration in children with smaller bodymass index may be due to general plastic deficiency in their organism. The results obtained in the present study may be used to reveal and analyze physical development and the organism morpho-functional peculiarities correlation markers.

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Relações entre esportividade e traços de personalidade de esportistas eletrônicos amadores do Rio de Janeiro (Relationship between sportsmanship and personality traits of amateur electronic sportsmen from Rio de Janeiro) (Relaciones entre deportividad y

Retos ◽

10.47197/retos.v38i38.75245 ◽

2020 ◽

pp. 537-542

Author(s):

Dirceu Ribeiro Gama ◽

Marcel Amaral De Queiroz ◽

Matheus Cristino Cordeiro ◽

Jean Marinho Eftimie ◽

Rodrigo Souza Vale

Keyword(s):

Personality Traits ◽

Rio De Janeiro ◽

Eysenck Personality Questionnaire ◽

Personality Questionnaire ◽

Positive Correlation ◽

Moderate Negative Correlation ◽

The Relationship ◽

Spearman’S Correlation ◽

Moderate Positive Correlation ◽

Janeiro City

Resumo: O objetivo deste estudo foi analisar as relações entre esportividade e traços de personalidade de esportistas eletrônicos amadores do Rio de Janeiro. A amostra foi composta de 36 esportistas eletrônicos amadores, todos residentes na cidade do Rio de Janeiro. Os instrumentos para coleta de dados foram o Questionário de Personalidade de Eysenck; Questionário de Atitudes no Esporte; e um questionário suplementar de cunho sociodemográfico. O teste de correlação de Spearman mostrou uma correlação negativa moderada da variável idade com os traços de personalidade Psicoticismo (rho= -0,424; p= 0,010) e Neuroticismo (rho= -0,386; p= 0,020), e com a dimensão Convenção (rho= -0,452; p= 0,006). A variável anos de jogo exibiu correlação positiva moderada com a dimensão Antidesportivismo (rho= 0,410; p= 0,013). A variável horas semanais praticadas também acusou uma correlação positiva moderada com o Antidesportivismo (rho= 0,345; p= 0,039). Observou-se uma correlação positiva moderada entre o Psicoticismo e a dimensão Convenção (rho= 0,360; p= 0,031). A Extroversão correlacionou-se positiva e moderadamente com a dimensão Trapaça (rho= 0,351; p= 0,036). O Neuroticismo e as dimensões Empenho (rho= 0,372; p= 0,025) e Convenção (rho= 0,447 p= 0,006) correlacionaram-se de modo positivo e moderado. Conclui-se que os graus de esportividade de esportistas eletrônicos estão relacionados a determinados traços de personalidade.Abstract: The aim of this study was to analyze the relationship between sportsmanship and personality traits of amateur electronic sportsmen from Rio de Janeiro. The sample consisted of 36 amateur electronic sportsmen, all residents at Rio de Janeiro city. The instruments for data collection were the Eysenck Personality Questionnaire; the Sport Attitudes Questionnaire; and a supplementary sociodemographic questionnaire. Spearman's correlation test showed a moderate negative correlation between the age variable and the personality traits Psychoticism (rho= -0,424; p= 0,010) and Neuroticism (rho= -0,386; p= 0,020), and the Convention dimension (rho= -0,452; p= 0,006). The variable years of practice exhibited moderate positive correlation with the dimension Unsportsmanship (rho= 0,410; p= 0,013). The variable hours per week practiced also showed a moderate positive correlation with Unsportsmanship (rho= 0,345; p= 0,039). There was a moderate positive correlation between Psychoticism and the Convention dimension (rho= 0,360; p= 0,031). Extroversion correlated positively and moderately with the Cheat dimension (rho= 0,351; p= 0,036). Neuroticism and the Commitment (rho= 0,372; p= 0,025) and Convention (rho= 0,447 p= 0,006) dimensions were correlated positively and moderately. One concludes that the sportsmanship levels of electronic sportsmen are related to certain personality traits.Resumen: El objetivo de este estudio fue analizar la relación entre deportividad y rasgos de personalidad de deportistas electrónicos amadores de Río de Janeiro. La muestra consistió en 36 deportistas electrónicos amadores, todos residentes en la ciudad de Río de Janeiro. Los instrumentos para la recolección de datos fueron el Cuestionario de personalidad de Eysenck; Cuestionario de actitudes deportivas; y un cuestionario sociodemográfico suplementario. La prueba de correlación de Spearman mostró una correlación negativa moderada de la variable edad con los rasgos de personalidad Psicoticismo (rho= -0,424; p= 0,010) y Neuroticismo (rho= -0,386; p= 0,020), y con la dimensión Convención (rho= -0,452; p= 0,006). La variable años de juego exhibiero una correlación positiva moderada con la dimensión Antideportividad (rho= 0,410; p= 0,013). Las horas semanales practicadas también mostraron una correlación positiva moderada con la Antideportividad (rho= 0,345; p= 0,039). Hubo una correlación positiva moderada entre el Psicoticismo y la dimensión de la Convención (rho= 0,360; p= 0,031). La Extroversión se correlacionó positiva y moderadamente con la dimensión Trapaza (rho= 0,351; p= 0,036). El Neuroticismo y las dimensiones de Empeño (rho= 0,372; p= 0,025) y Convención (rho= 0,447 p= 0,006) se correlacionaron positiva y moderadamente. Se concluye que los grados de Deportividad de los deportes electrónicos están relacionados con ciertos rasgos de personalidad.

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Hope and spirituality among patients with chronic kidney disease undergoing hemodialysis: a correlational study

Revista Latino-Americana de Enfermagem ◽

10.1590/0104-1169.3323.2409 ◽

2014 ◽

Vol 22 (2) ◽

pp. 248-254 ◽

Cited By ~ 17

Author(s):

Ana Carolina Ottaviani ◽

Érica Nestor Souza ◽

Natália de Camargo Drago ◽

Marisa Silvana Zazzetta de Mendiondo ◽

Sofia Cristina Iost Pavarini ◽

...

Keyword(s):

Chronic Kidney Disease ◽

Kidney Disease ◽

Health Professionals ◽

Correlational Study ◽

Cross Sectional ◽

Positive Correlation ◽

Individual Interviews ◽

Herth Hope Index ◽

The Relationship ◽

Moderate Positive Correlation

OBJECTIVE: to analyze the relationship between the hope and spirituality of patients with chronic kidney disease undergoing hemodialysis.METHOD: this is a cross-sectional, correlational study. The sample was composed of 127 patients of a Renal Replacement Unit. Data were collected through individual interviews guided by the following instruments: participant characterization, Herth Hope Index (HHI), and Pinto Pais-Ribeiro Spirituality Scale (PP-RSS).RESULTS: the average HHI score was 38.06 (±4.32) while the average PP-RSS score was 3.67 (±0.62) for "beliefs" and 3.21 (±0.53) for "hope/optimism". Spearman's coefficient indicated there was a moderate positive correlation between the HHI and PP-RSS dimensions of "beliefs" (r=0.430; p<0.001) and "hope/optimism" (r=0.376; p<0.001).CONCLUSION: Since a relationship between the sense of hope and spirituality of patients with chronic kidney disease was found, these constructs should be taken into account at the time health professionals deliver care to help patients coping with the disease and treatment.

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Desenvolvimento Motor da criança: Relação entre Habilidades Motoras Globais, Habilidades Motoras Finas e Idade

Cuadernos de Psicología del Deporte ◽

10.6018/cpd.385791 ◽

2019 ◽

Vol 20 (1) ◽

pp. 75-85 ◽

Cited By ~ 1

Author(s):

Miguel Rebelo

Keyword(s):

Motor Skills ◽

Quantitative Study ◽

Motor Development ◽

Fine Motor ◽

Fine Motor Skills ◽

Positive Correlation ◽

Positive Correlations ◽

Peabody Developmental Motor Scales ◽

The Relationship ◽

Moderate Positive Correlation

El presente estudio sobre el desarrollo Motor del niño en los primeros meses de vida, tuvo como objetivo verificar la relación entre las Habilidades Motoras Globales, las Habilidades Motoras Finas y la Edad de los niños. Para ello, desarrollamos un estudio de naturaleza cuantitativa, con una muestra de 405 niños de edades comprendidas entre los 12 y los 46 meses, de ambos géneros. Los instrumentos utilizados en el estudio fueron las Peabody Developmental Motor Scales-2 (PDMS-2). En términos globales los resultados indican que existe una tendencia a correlaciones positivas entre las variables Edad, Habilidades Motoras Globales y Habilidades Motoras Finas, resaltando la correlación positiva moderada (p≤0.05, r2=0.265, 0.5≤ r ≤ 0.7) entre la Edad y la Motricidad Fina a su vez una pequeña correlación positiva (p≤0.05, r2=0.217, 0.1≤ r ≤ 0.3) entre la Edad y la Motricidad Global. Podemos así constatar, una mejora de esas habilidades a medida que los niños crecen, evidenciando mejores resultados en la Motricidad Fina. Los resultados obtenidos sugieren la importancia de la relación entre la edad y las habilidades motoras, enfocando la necesidad de desarrollar con más énfasis las Habilidades Motoras Globales. The present study on motor development of the child in the first months of life, at verifying the relationship between Global Motor Skills, Fine Motor Skills and the Age of children. For this purpose, we developed a quantitative study, with a sample of 405 children between the ages of 12 and 46 months of both genders. The instruments used in the study were the Peabody Developmental Motor Scales-2 (PDMS-2). Overall, the results indicate that there is a tendency for positive correlations between the variables Age, Global Motor Skills and Fine Motor Skills, emphasizing the moderate positive correlation (p≤0.05; r2=0.265; 0.5≤ r ≤ 0.7) between Age and Fine Motricity in turn a small positive correlation (p≤0.05; r2=0.217; 0.1≤ r ≤ 0.3) between Age and Global Motricity. We can thus see an improvement of these abilities as children grow, evidencing better results in Fine Motor. The results suggest the importance of the relationship between age and motor skills, focusing on the need to develop with more emphasis the Global Motor Skills. O presente estudo sobre o desenvolvimento Motor da criança nos primeiros meses de vida, teve como objetivo verificar a relação entre as Habilidades Motoras Globais, as Habilidades Motoras Finas e a Idade das crianças. Estudo transversal, com uma amostra de 405 crianças com idades compreendidas entre os 12 e os 46 meses, de ambos os géneros. Os instrumentos usados no estudo foram as Peabody Developmental Motor Scales-2 (PDMS-2). Em termos globais os resultados indicam que existe uma tendência para correlações positivas entre as variáveis Idade, Habilidades Motoras Globais e Habilidades Motoras Finas, salientando a correlação positiva moderada (p≤0.05; r2=0.265; 0.5≤ r ≤0.7) entre a Idade e a Motricidade Fina, e uma correlação positiva pequena (p≤0.05; r2=0.217; 0.1≤ r ≤ 0.3) entre a Idade e a Motricidade Global. Podemos assim constatar, uma melhoria destas habilidades à medida que as crianças vão crescendo, evidenciando melhores resultados na Motricidade Fina. Os resultados obtidos sugerem a importância da relação entre a idade e as habilidades motoras, focando a necessidade de desenvolver com mais ênfase as Habilidades Motoras Globais.

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Comparison of temperature readings using infrared thermometers at three different sites: tympanic, forehead and temporal

Proceedings of Singapore Healthcare ◽

10.1177/2010105820935932 ◽

2020 ◽

pp. 201010582093593

Author(s):

Warren Weng Seng Fong ◽

Shuan Khiag Yeo ◽

Stephanie Man Chung Fook-Chong ◽

Jie Kie Phang ◽

Eugene Sim

Keyword(s):

Predictive Value ◽

Pearson Correlation ◽

Mean Difference ◽

The Body ◽

Tympanic Temperature ◽

Limits Of Agreement ◽

Positive Correlation ◽

Singapore General Hospital ◽

The Relationship ◽

Moderate Positive Correlation

The aim of this study was to compare the body temperature measurements at tympanic, forehead and temporal sites using infrared thermometers. A total of 1576 consecutive visitors to Singapore General Hospital at two entry locations were included in this study. Pearson correlation and Bland–Altman mean difference between sites (95% confidence interval for limits of agreement) were calculated for the relationship between the three different sites of temperatures recorded (i.e. temporal, forehead and tympanic). Of all the visitors, 27 (1.7%) had fever. Moderate positive correlation was found between temporal and forehead temperature readings ( r=0.602, mean difference (temporal – forehead), (95% limits of agreement) = 0.1 (−0.8, 0.7)), and there was very weak positive correlation between tympanic and temporal temperature readings ( r=0.177, mean difference (temporal – tympanic), (95% limits of agreement) = −0.3 (−1.7, 1.1)). Sensitivity for temporal temperature readings (⩾37.5°C) to detect febrile visitors was 3.7%, specificity was 99.6%, positive predictive value was 14.3% and negative predictive value was 98.3%. Our results demonstrate that tympanic temperature readings should be used for fever screening instead of temporal or forehead readings.

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CT density of cervical thymus, in comparison with mediastinal thymus

Insights into Imaging ◽

10.1186/s13244-019-0781-z ◽

2019 ◽

Vol 10 (1) ◽

Author(s):

Anitha Sen ◽

Jiji Valsalamony ◽

Jubie Raj

Keyword(s):

Young Adults ◽

Soft Tissue ◽

Older Age ◽

List Type ◽

Age Group ◽

Positive Correlation ◽

Children And Young Adults ◽

Criteria For Diagnosis ◽

Ct Density ◽

Moderate Positive Correlation

Abstract Objectives Cervical component of thymus is noted more in children and young adults than in older age group. CT texture (lobules of soft tissue interspersed with fat), similarity with CT density of mediastinal thymus and continuity with mediastinal thymus on sagittal/coronal images, are given as the criteria for diagnosis of the cervical thymus. But CT densities of cervical and mediastinal components of the thymus may vary. The purpose of our study was to compare CT densities of cervical and mediastinal parts of the thymus, in cases where ultrasonography correlation was available. Methods We retrospectively identified 22 patients who had undergone CT between May 2015 and May 2017 and in whom ultrasonography (USG) correlation was available. CT densities of cervical and mediastinal components of thymus were measured. Results CT density of cervical thymus is lower than the CT density of mediastinal thymus by ~ 25 HU. There is a moderate positive correlation between CT densities of cervical and mediastinal parts of the thymus. CT densities of both cervical and mediastinal thymus were found to reduce with age, but the reduction was statistically significant only in the cervical thymus in this study. Conclusions CT densities of cervical and mediastinal components of the thymus may vary, with CT density of cervical thymus being lower. There is a positive correlation between CT densities of cervical and mediastinal parts of the thymus. CT density of cervical thymus reduces with age. Understanding these may help avoid confusion on CT and avoid the need for correlative USG, saving time and effort.

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Study on the relationship of depression, anxiety, lifestyle and eating habits with the severity of reflux esophagitis

BMC Gastroenterology ◽

10.1186/s12876-021-01717-5 ◽

2021 ◽

Vol 21 (1) ◽

Author(s):

Rongxin Wang ◽

Jing Wang ◽

Shuiqing Hu

Keyword(s):

Quality Of Life ◽

Logistic Regression ◽

Regression Analysis ◽

Logistic Regression Analysis ◽

Reflux Esophagitis ◽

Eating Habits ◽

Positive Correlation ◽

Relationship Of ◽

The Relationship

Abstract Background The etiology of reflux esophagitis (RE) is multi-factorial. This study analyzed the relationship of depression, anxiety, lifestyle and eating habits with RE and its severity and further explored the impact of anxiety and depression on patients’ symptoms and quality of life. Methods From September 2016 to February 2018, a total of 689 subjects at Xuanwu Hospital Capital Medical University participated in this survey. They were divided into the RE group (patients diagnosed with RE on gastroscopy, n = 361) and the control group (healthy individuals without heartburn, regurgitation and other gastrointestinal symptoms, n = 328). The survey included general demographic information, lifestyle habits, eating habits, comorbidities, current medications, the gastroesophageal reflux disease (GERD) questionnaire (GerdQ), the Patient Health Questionnaire-9 depression scale and the General Anxiety Disorder-7 anxiety scale. Results The mean age and sex ratio of the two groups were similar. Multivariate logistic regression analysis identified the following factors as related to the onset of RE (p < 0.05): low education level; drinking strong tea; preferences for sweets, noodles and acidic foods; sleeping on a low pillow; overeating; a short interval between dinner and sleep; anxiety; depression; constipation; history of hypertension; and use of oral calcium channel blockers. Ordinal logistic regression analysis revealed a positive correlation between sleeping on a low pillow and RE severity (p = 0.025). Depression had a positive correlation with the severity of symptoms (rs = 0.375, p < 0.001) and patients’ quality of life (rs = 0.306, p < 0.001), whereas anxiety showed no such association. Conclusions Many lifestyle factors and eating habits were correlated with the onset of RE. Notably, sleeping on a low pillow was positively correlated with RE severity, and depression was positively related to the severity of symptoms and patients’ quality of life.

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Spatial Variation of the Relationship between PM2.5Concentrations and Meteorological Parameters in China

BioMed Research International ◽

10.1155/2015/684618 ◽

2015 ◽

Vol 2015 ◽

pp. 1-15 ◽

Cited By ~ 10

Author(s):

Gang Lin ◽

Jingying Fu ◽

Dong Jiang ◽

Jianhua Wang ◽

Qiao Wang ◽

...

Keyword(s):

Negative Correlation ◽

Meteorological Parameters ◽

Semiarid Region ◽

Strong Positive Correlation ◽

Annual Average ◽

Strong Negative Correlation ◽

Positive Correlation ◽

Humid Region ◽

The Relationship ◽

Warm Temperate

Epidemiological studies around the world have reported that fine particulate matter (PM2.5) is closely associated with human health. The distribution of PM2.5concentrations is influenced by multiple geographic and socioeconomic factors. Using a remote-sensing-derived PM2.5dataset, this paper explores the relationship between PM2.5concentrations and meteorological parameters and their spatial variance in China for the period 2001–2010. The spatial variations of the relationships between the annual average PM2.5, the annual average precipitation (AAP), and the annual average temperature (AAT) were evaluated using the Geographically Weighted Regression (GWR) model. The results indicated that PM2.5had a strong and stable correlation with meteorological parameters. In particular, PM2.5had a negative correlation with precipitation and a positive correlation with temperature. In addition, the relationship between the variables changed over space, and the strong negative correlation between PM2.5and the AAP mainly appeared in the warm temperate semihumid region and northern subtropical humid region in 2001 and 2010, with some localized differences. The strong positive correlation between the PM2.5and the AAT mainly occurred in the mid-temperate semiarid region, the humid, semihumid, and semiarid warm temperate regions, and the northern subtropical humid region in 2001 and 2010.

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Relationship amongst ResearchGate altmetric indicators and Scopus bibliometric indicators

New Library World ◽

10.1108/nlw-03-2015-0017 ◽

2015 ◽

Vol 116 (9/10) ◽

pp. 564-577 ◽

Cited By ~ 10

Author(s):

RISHABH SHRIVASTAVA ◽

Preeti Mahajan

Keyword(s):

Sample Size ◽

Correlation Coefficients ◽

Strong Positive Correlation ◽

Bibliometric Indicators ◽

Pearson’S Correlation ◽

Content Type ◽

Positive Correlation ◽

Pearson's Correlation ◽

Different Characteristics ◽

The Relationship

Purpose – The purpose of this paper is twofold. First, the study aims to investigate the relationship between the altmetric indicators from ResearchGate (RG) and the bibliometric indicators from the Scopus database. Second, the study seeks to examine the relationship amongst the RG altmetric indicators themselves. RG is a rich source of altmetric indicators such as Citations, RGScore, Impact Points, Profile Views, Publication Views, etc. Design/methodology/approach – For establishing whether RG metrics showed the same results as the established sources of metrics, Pearson’s correlation coefficients were calculated between the metrics provided by RG and the metrics obtained from Scopus. Pearson’s correlation coefficients were also calculated for the metrics provided by RG. The data were collected by visiting the profile pages of all the members who had an account in RG under the Department of Physics, Panjab University, Chandigarh (India). Findings – The study showed that most of the RG metrics showed strong positive correlation with the Scopus metrics, except for RGScore (RG) and Citations (Scopus), which showed moderate positive correlation. It was also found that the RG metrics showed moderate to strong positive correlation amongst each other. Research limitations/implications – The limitation of this study is that more and more scientists and researchers may join RG in the future, therefore the data may change. The study focuses on the members who had an account in RG under the Department of Physics, Panjab University, Chandigarh (India). Perhaps further studies can be conducted by increasing the sample size and by taking a different sample size having different characteristics. Originality/value – Being an emerging field, not much has been conducted in the area of altmetrics. Very few studies have been conducted on the reach of academic social networks like RG and their validity as sources of altmetric indicators like RGScore, Impact Points, etc. The findings offer insights to the question whether RG can be used as an alternative to traditional sources of bibliometric indicators, especially with reference to a rapidly developing country such as India.

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Reducing Unnecessary Sleep Disruption for Neonatal Patients

Proceedings of the International Symposium on Human Factors and Ergonomics in Health Care ◽

10.1177/2327857913021029 ◽

2013 ◽

Vol 2 (1) ◽

pp. 154-159

Author(s):

Swaroop Rajaraman ◽

Thomas Ferris

Keyword(s):

Critical Care ◽

Intensive Care ◽

Neonatal Intensive Care ◽

Physical Development ◽

Sleep Disruption ◽

Future Research ◽

Metropolitan Hospital ◽

The Relationship ◽

Wake State ◽

Do So

This research addresses a major issue that is receiving growing attention in neonatal intensive care: the importance of uninterrupted sleep to promote healthy cognitive and physical development for NICU patients. This issue is addressed by targeting classic human factors problems with alarms in critical care environments. The focus of this research is in the intersection between alarm problems and problems related to unnecessary disruption of patients’ sleep. An observational study is currently underway at a major metropolitan hospital to document the relationship between alarms and sleep/wake state, highlighting characteristics of alarms and contexts when sleep is disrupted due to clinically insignificant/inactionable alarms and also when nurses’ response to the alarms leads to them intentionally waking the patients when it is unnecessary to do so. Methods for this work are discussed in detail, and preliminary anecdotal findings suggest that apnea and bradycardia are some of the more problematic alarms for unnecessary sleep disruption. Future research plans to address these and other problematic alarms are also discussed.

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Effect of Vibration on Rapeseed Header Loss and Optimization of Header Frame

Transactions of the ASABE ◽

10.13031/trans.13299 ◽

2021 ◽

Vol 64 (4) ◽

pp. 1247-1258

Author(s):

Yang Li ◽

Lizhang Xu ◽

Zhipeng Gao ◽

En Lu ◽

Yaoming Li

Keyword(s):

Modal Analysis ◽

Engine Speed ◽

Vibration Measurement ◽

List Type ◽

Positive Correlation ◽

Combine Harvester ◽

Analysis System ◽

Combine Harvesters ◽

Relationship Of ◽

The Relationship

HighlightsThe relationship of vibration and header loss was studied by multi-point vibration measurement and loss collection test.There was an approximately linear positive correlation between total header vibration and total rapeseed header loss.The header frame was analyzed and optimized through modal simulation and testing.The total rapeseed header loss of the improved header was reduced by 33.2% to 46.9%.Abstract. In view of the current large rapeseed header losses of rape combine harvesters, the effects of the header on rapeseed header loss were studied from the perspective of vibration. First, the vibrations at various measuring points on the header during rape harvest were studied using a data acquisition and analysis system while performing collection tests of rapeseed header loss with the sample slot method. The relationships between total header vibration and total rapeseed header loss and between vertical cutter vibration and rapeseed vertical cutter loss were shown to have a positive correlation, and they all increased with the increase in engine speed. Vertical cutter loss accounted for 31.2% to 42.4% of the total rapeseed header loss. Modal analysis and optimization of the header frame were then performed by simulation and test. The natural frequencies of the first-order and second-order modes of the optimized header were increased, and the possibility of resonance with other working parts was eliminated. Finally, the improved header was tested during rape harvest. The results showed that the total vibration of the improved header was reduced by 19.9% to 43.9%, and the total rapeseed header loss was reduced by 33.2% to 46.9%. The vertical cutter vibration was reduced by 30.5% to 49.8%, and the rapeseed vertical cutter loss was reduced by 20.8% to 34.7%. In addition, the vibration and rapeseed loss of the improved header had relatively slow rates of increase with the increase in engine speed. The method of reducing rapeseed loss by reducing the header vibration achieved an obvious and positive effect. Keywords: Frame optimization, Modal analysis, Rape combine harvester, Rapeseed header loss, Vibration.

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