406 research outputs found
[[alternative]]Effects of Relative Positions and Age Differences on Motor Imitation by Mediator
No full text[[abstract]]Effects of Relative Positions and Age Differences on Motor Imitation
by Mediator
Master’s Thesis, 2005 Zhen-yi Chen
Advisor: Hank Junling Jwo, Ph.D.
ABSTRACT
This study was designed to further determine findings of Chen and Jwo’s studies (2003, 2004) on relative positions between demonstrator and learner in observational learning and modeling. Indirect approach by manipulating the mediator (wooden manikin) was used. Twelve female fourth graders (M = 10.0 years, SD = 0.3 years) and twelve female senior kindergarteners (M = 5.9 years, SD = 0.3 years) were served as participants, whom were offered two trials to perform the bimanual movement pattern under face-face and back-face relative positions with manipulating the mediator. The videotaped data were analyzed and the inter-rater and intra-rater reliabilities were 91.0% and 87.6% respectively. 2 (age) ×2 (relative positions) two-way ANOVA mixed design with relative positions as repeated measures, and chi-square test revealed that (1) the elder children were better than the younger ones in performance of motor under face-face, (2) there were no differences between groups under relative positions in manipulating time, (3) the face-direct were same both of the mediator and the demonstrator, (4) the processes of manipulating mediator were from upper limbs to lower limbs and from midline to periphery.
Key words: mediator, imitation, relative positions, age differences, demonstration.
[[alternative]]Effects of perceptual modality and distance on basketball shooting
No full text[[abstract]]Effects of Perceptual Modality and Distance on Basketball Shooting Action
Master’s Thesis, 2003 Shu-hui Chen
Advisor: Junling Jwo, Ph.D.
Abstract
Traditional view of indirect perception and action and ecological psychology view of direct perception and action were found research literatures of individual’s perception and action. Research questions in this study were: (1) Were there difference in shooting scores between the two different perceptual modalities under distance constrains? (2) What was the association among the shooting patterns, the perceptual modality, and the distance constraint? (3) Were there difference in shooting patterns between the two perceptual modalities under distance constrains? Twenty high school female students (mean age = 17.4 ± 0.5 yrs.) served as participants. The experimental task was to shoot basketball for 10 times from six different distances (1.8, 3.8, 5.8, 7.8, 9.8, and 11.8 meters away from baseline) through the two different perceptual modalities. Shooting performance was filmed and analyzed by using component approach and scoring system. Tow way repeated measure ANOVA with 2 (perceptual modality) ´ 6 (shooting distances), c2 multiple contingency table, G2 test, c2 test for homogeneity were administered for analyses. The finding were as follows: (1) There were differences in shooting scores between indirect and direct perceptual modalities under distance constrains except for the 1.8 meter away from baseline. (2) There was association among shooting patterns, perceptual modalities, and distances constraints. (3) There were differences in shooting patterns between indirect and direct perceptual modalities under six distance constrains except for the shooting patterns under 1.8, 3.8, 5.8, 7.8, and 11.8 meters away from baseline; trunk under 5.8 and 11.8 meters away from baseline; feet under 11.8 meters away from baseline.
Keywords: indirect perception and action, direct perception and action, shooting patterns.
[[alternative]]Performance of standing long jump and its correlates among
No full text[[abstract]]Performance of standing long jump and its correlates among
male children in later childhood
Master’s Thesis,2004 Chun-chich Wang
Advisor: Junling Jwo, Ph.D.
Abstract
Fundamental movement performance is the product of the interaction of many factors. According to the constraints model, the movement can be influenced by factors of individual constraints, environmental constraints, and task constraints, and there are probably close relationships between individual factors and performance of standing long jump (SLJ). The main purpose of this study was to investigate the performance of SLJ and its correlates among male children in later childhood. Seven selected individual factors, pattern of SLJ, leg strength, leg length, body mass index (BMI), and the flexibility of hip, knee, and ankle were examined its relationships with and predictors for SLJ’s performance. One hundred and twenty-one participants, whose mean age were 11.7 years (SD = 0.6 years), were measured for the seven individual factors, the SLJ performance, and SLJ pattern. Total body approach was used to analyze SLJ pattern. The inter-rater reliability was .85; the intra-rater reliability was .90. The Stepwise Regression analyses showed that: (1) SLJ’s performance was positively correlated with the level of SLJ (r = .79, p < .05), leg strength (r = .33, p < .05), the flexibility of hip (r = .34, p < .05), knee (r = .48, p < .05), and ankle(r = .22, p < .05), SLJ’s performance was negatively correlated with BMI (r = -.41, p < .05), and (2) SLJ’s pattern, the flexibility of hip, and knee accounted for 69% of the SLJ’s performance variance. Therefore, it was concluded that, among children in later childhood, (1) the factors of the level of SLJ, leg strength, BMI, the flexibility of hip, knee, and ankle were correlated with SLJ’s performance, and (2) SLJ’s pattern, the flexibility of hip and knee were the predictors of SLJ’s performance.
Key words: constraints model, later childhood, standing long
jump, movement patterns, individual factors.
[[alternative]]Association of Physical Activity Level, Peer Relation, and Physical Self-concept in Later Childhood: Sport Participation and Gender Differences
No full text[[abstract]]Association of Physical Activity Level, Peer Relation, and Physical Self-concept in Later Childhood: Sport Participation and Gender Differences
Master’s Thesis, 2006 Peng-jen Chen
Advisor: Hank Junling Jwo, Ph.D.
Abstract
Psychological Model for Physical Activity suggests the individual perception of physical capability can promote attraction of physical activity and reflects constant physical activity participation. This study was designed to examine the association of physical activity level, peer relation, and physical self-concept with sport participation and gender differences in later childhood. Three hundred and sixty-seven children in twelve grades were purposive sampled, whose average age were 11.9 ± 0.5 years. Physical Activity Questionnaire, Index of Sociometric Status Score, and Physical Self-concept Inventory were completed by all participants. The collected data were analyzed by Pearson Product Moment correlation and t-tests. The results showed that: (1) The physical activity level in later childhood was positively correlated with the physical self-concept, and the item of flexibility, endurance, appearance, and strength. However, the physical activity level was negatively correlated with fatness; (2) There were general significantly among the physical activity level and physical self-concept in later childhood. Boys had higher endurance, appearance, and strength than that of girls. Girls had higher scores in flexibility and fatness but no significant difference was found; (3) Significant difference was found among physical activity level, peer relation, and physical self-concept in later childhood with sport participation; (4) Significant difference was found that in later childhood with higher physical activity level had batter physical self-concept than ones with lower physical activity level. Therefore, it was concluded that, in later childhood with higher physical activity level had higher physical self-concept, boys had higher physical activity level and physical self-concept than girls in later childhood, and the later childhood with sport participation than ones without sport participation in physical activity level, peer relation, and physical self-concept.
Key words：physical activity level, physical self-concept, peer relation
The Initial Opening of the Drake Passage Occurred During ca. 62‐59 Ma
No full textAbstract Although the Drake Passage has been considered a critical component of ocean circulation and climate, its initial opening age remains controversial due to the weak constraints on the paleoposition of the Antarctic Peninsula. Here, new zircon U‐Pb geochronological studies are conducted on the Barchans Islands, providing a critical age constraint on the paleopole (Latitude = 76.9°S, Longitude = 332.1°E, A 95 = 5.9°) of the peninsula at ca. 59 Ma. Geochronological and paleomagnetic studies on Anagram Island and King George Island provide a new paleopole (Latitude = 77.4°S, Longitude = 23.5°E, A 95 = 4.4°) of the Antarctic Peninsula at ca. 55 Ma. When combined with existing evidence, the initial separation between the Antarctic Peninsula and the Patagonian Andes is restricted to be between ca. 62 and 59 Ma, caused by the clockwise rotation of the Antarctic Peninsula. The separation induced the initial opening of the Drake Passage and the formation of the shallow proto‐Antarctic circumpolar current, as well as Paleocene global cooling.Plain Language Summary Although the Antarctic circumpolar current is thought to be an important component of ocean circulation and climate, its evolution is still debated due to poor restrictions on the initial opening age of the Drake Passage. In this study, we present new Paleocene chronological and paleomagnetic data from the Antarctic Peninsula and the South Shetland Islands, which are used to reconstruct the separation between the Antarctic Peninsula and the Patagonian Andes through a combination of existing paleomagnetic data, geological evidence, and numerical simulations. Our new findings reveal that the continents separated between ca. 62 and 59 Ma, as a result of the clockwise rotation of the Antarctic Peninsula. The shallow proto‐Antarctic circumpolar current was formed after the separation, changed global ocean circulation, and caused global cooling.Key Points We obtained new chronological and paleomagnetic data from the Antarctic Peninsula and the South Shetland Islands The initial opening of the Drake Passage occurred during ca. 62‐59 Ma caused by the clockwise rotation of the Antarctic Peninsula The ocean variation and global cooling during ca. 62‐59 Ma is supported to be induced by the initial opening of the Drake PassageAbstract Although the Drake Passage has been considered a critical component of ocean circulation and climate, its initial opening age remains controversial due to the weak constraints on the paleoposition of the Antarctic Peninsula. Here, new zircon U‐Pb geochronological studies are conducted on the Barchans Islands, providing a critical age constraint on the paleopole (Latitude = 76.9°S, Longitude = 332.1°E, A 95 = 5.9°) of the peninsula at ca. 59 Ma. Geochronological and paleomagnetic studies on Anagram Island and King George Island provide a new paleopole (Latitude = 77.4°S, Longitude = 23.5°E, A 95 = 4.4°) of the Antarctic Peninsula at ca. 55 Ma. When combined with existing evidence, the initial separation between the Antarctic Peninsula and the Patagonian Andes is restricted to be between ca. 62 and 59 Ma, caused by the clockwise rotation of the Antarctic Peninsula. The separation induced the initial opening of the Drake Passage and the formation of the shallow proto‐Antarctic circumpolar current, as well as Paleocene global cooling.Plain Language Summary Although the Antarctic circumpolar current is thought to be an important component of ocean circulation and climate, its evolution is still debated due to poor restrictions on the initial opening age of the Drake Passage. In this study, we present new Paleocene chronological and paleomagnetic data from the Antarctic Peninsula and the South Shetland Islands, which are used to reconstruct the separation between the Antarctic Peninsula and the Patagonian Andes through a combination of existing paleomagnetic data, geological evidence, and numerical simulations. Our new findings reveal that the continents separated between ca. 62 and 59 Ma, as a result of the clockwise rotation of the Antarctic Peninsula. The shallow proto‐Antarctic circumpolar current was formed after the separation, changed global ocean circulation, and caused global cooling.Key Points We obtained new chronological and paleomagnetic data from the Antarctic Peninsula and the South Shetland Islands The initial opening of the Drake Passage occurred during ca. 62‐59 Ma caused by the clockwise rotation of the Antarctic Peninsula The ocean variation and global cooling during ca. 62‐59 Ma is supported to be induced by the initial opening of the Drake PassageAbstract Although the Drake Passage has been considered a critical component of ocean circulation and climate, its initial opening age remains controversial due to the weak constraints on the paleoposition of the Antarctic Peninsula. Here, new zircon U‐Pb geochronological studies are conducted on the Barchans Islands, providing a critical age constraint on the paleopole (Latitude = 76.9°S, Longitude = 332.1°E, A 95 = 5.9°) of the peninsula at ca. 59 Ma. Geochronological and paleomagnetic studies on Anagram Island and King George Island provide a new paleopole (Latitude = 77.4°S, Longitude = 23.5°E, A 95 = 4.4°) of the Antarctic Peninsula at ca. 55 Ma. When combined with existing evidence, the initial separation between the Antarctic Peninsula and the Patagonian Andes is restricted to be between ca. 62 and 59 Ma, caused by the clockwise rotation of the Antarctic Peninsula. The separation induced the initial opening of the Drake Passage and the formation of the shallow proto‐Antarctic circumpolar current, as well as Paleocene global cooling.Plain Language Summary Although the Antarctic circumpolar current is thought to be an important component of ocean circulation and climate, its evolution is still debated due to poor restrictions on the initial opening age of the Drake Passage. In this study, we present new Paleocene chronological and paleomagnetic data from the Antarctic Peninsula and the South Shetland Islands, which are used to reconstruct the separation between the Antarctic Peninsula and the Patagonian Andes through a combination of existing paleomagnetic data, geological evidence, and numerical simulations. Our new findings reveal that the continents separated between ca. 62 and 59 Ma, as a result of the clockwise rotation of the Antarctic Peninsula. The shallow proto‐Antarctic circumpolar current was formed after the separation, changed global ocean circulation, and caused global cooling.Key Points We obtained new chronological and paleomagnetic data from the Antarctic Peninsula and the South Shetland Islands The initial opening of the Drake Passage occurred during ca. 62‐59 Ma caused by the clockwise rotation of the Antarctic Peninsula The ocean variation and global cooling during ca. 62‐59 Ma is supported to be induced by the initial opening of the Drake PassageNational Natural Science Foundation of China https://doi.org/10.13039/50110000180
Pair formation and disease dynamics: modeling HIV and HCV among injection drug users in Victoria, BC
No full textNew survey data indicate that injection drug users (IDU) in Victoria, BC who
share syringes do so with a single person. These partnerships pose an obvious health
risk to IDU, as blood borne illnesses are transmitted through the sharing of injection
equipment. Here we formulate an ordinary di erential equation (ODE) model of pair
formation and separation. Susceptible-infectious (SI) disease dynamics are built into
this model so as to describe the syringe-mediated transmission of human immune
de ciency virus (HIV) and hepatitis C virus (HCV) among IDU. We utilize a novel
parameter estimation approach, and t the distribution of partnership durations observed
in Victoria. The basic reproduction number is derived, and its qualitative
behavior explored with both analytical and numerical techniques
Generating function approach for the effective degree SIR Model
No full textThe effective degree model has been applied to both SIR and SIS type diseases
(those which confer permanent immunity and those which do not, respectively) with
great success. The original model considers a large system of ODEs to keep track of
the number of infected and susceptible neighbours of an individual. In this thesis, we
use a generating function approach on the SIR effective degree model to transform
the system of ODEs into a single PDE. This has the advantage of allowing the con-
sideration of infinite networks. We derive existence and uniqueness of solutions to the
PDE. Furthermore, we show that the linear stability of the PDE is governed by the
same disease threshold derived by the ODE model, and we also show the nonlinear
instability of the PDE agrees with the same disease threshold.Graduat
Estimating the Size of the COVID-19 Population in British Columbia Using the Stratified Petersen Estimator
No full textThe presence of undetected COVID-19 cases is a known phenomenon. Mathematical modelling techniques, such as capture-recapture, provide a reliable method for estimating the true size of the infected population. Treating a positive SARS-CoV-2 diagnostic test result as the initial capture and a hospital admission with a COVID-19-related diagnosis code as the recapture, we developed a Lincoln-Petersen model with temporal stratification, taking into account factors that influence the occurrence of captures. Applying this model to repeated patient encounter data collected at the provincial level in British Columbia, we estimated the number of COVID-19 cases among males aged 35 or older during the first week of March 2021. Our analysis revealed that the true number of cases ranged from 4.94 to 9.18 times greater than the number of detected cases.Graduat
Synthesis and property investigation of Schiff-base polycavitand nanocapsules
No full textDisclosed are studies on the design and synthesis of polycavitand nanocapsules and their encapsulation properties. In Chapter 1, a general overview about capsular molecules is presented. In Chapter 2, the synthesis, characterization and chiral guest recognition of chiral tetracavitand nanocapsules and chiral hemicarcerands are described. For tetracavitand nanocapsule 41a, a two-step enantiomerization process is discussed. In Chapter 3, the rational design and synthesis of giant nanocapsules, including octahedral and rhombicuboctahedral nanocapsules is discussed. These nanocapsules formed quantitatively from condensation reactions between deep cavitands and linear aromatic linkers. In Chapter 4, effective molarities (EMs) of a series of hemicarcerands and nanocapsules were measured. The results show that solvents and the linker rigidity play an important role in the formation of hemicarcerands and EMs of nanocapsules 23, 65a, 67a and 69 are mainly controlled by entropy. Furthermore, stepwise EMs of hemicarcerands 20b, 20d and 20g are discussed, too. In Chapter 5, the synthesis of hemicarcerands through liquid-assisted grinding (LAG) is described. Furthermore, encapsulation inside hemicarcerands 20b, 20d and 20g by grinding is discussed. In Chapter 6, water-soluble acylhydrazone rhombicuboctahedral nanocapsules were synthesized. Preliminary results of protein encapsulation are also presented.Ph. D.Includes bibliographical referencesIncludes vitaby Junling Su
Cyclic Dynamics Caused by Antigenic Drift
No full text Traditionally, seasonal forcing has been considered to be the major cause of the influenza seasonality. However, Andreasen [2003] showed that repetitive introductions of new strains can lead to cyclic dynamics. The cyclic dynamic produced by his model is not seasonal, because the length of seasons cannot be defined in his model. In this report, we develop a model that combines a stochastic mutation process with a two-strain competition process governing the spread of the mutant strain. This model can produce stable seasonal dynamics. If we introduce a small seasonal forcing to the transmission rate, the length of a season can be regulated to one year if the unforced system oscillates with a period close to one year. If the system has a period that is far from one year, then the forced system may behave chaotically.ThesisMaster of Science (MSc
- …
