首页 > 最新文献

The Journal of Undergraduate Research最新文献

英文 中文
Motivational Effects of Goal Orientation 目标取向的动机效应
Pub Date : 2017-01-01 DOI: 10.32727/25.2019.18
Charles N. Elliott, Paul A. Story
According to achievement goal theory, individuals set mastery or performance goals to accomplish challenging tasks. In addition, they can either approach or avoid the goal they are achieving. Mastery goals show positive correlation to intrinsic motivation while performance goals are linked to extrinsic motivation. Goal setting also affects motivation for completing tasks and perception of self-efficacious behavior while performing tasks. Receiving feedback has been positively correlated with success in learning and intrinsic motivation. The present research manipulates goal orientation through the accomplishment of a word find in an online experimental setting to test the effect on feedback, intrinsic motivation, choice, and self-efficacy. Positive versus highly positive feedback conditions were used after the word find to test effects on perceived competence following a task. For the approach-mastery goal condition, we found main effects for intrinsic motivation, perceived choice, task choice, and views of task importance. Additionally, we found a main effect for perceived competence for our highly positive feedback condition versus giving just positive feedback. These results demonstrate support for accomplishing challenging tasks with mastery goals versus performance goals and the usage of more positive feedback in a feedback condition.
根据成就目标理论,个体设定掌握或绩效目标来完成具有挑战性的任务。此外,他们可以接近或避免他们正在实现的目标。精通目标与内在动机正相关,绩效目标与外在动机正相关。目标设定也会影响完成任务的动机和在执行任务时对自我效能行为的感知。接受反馈与学习成功和内在动机呈正相关。本研究通过在网络实验环境中完成一个词的发现来操纵目标取向,以测试其对反馈、内在动机、选择和自我效能的影响。在“发现”这个词之后,研究人员使用了积极反馈和高度积极反馈的条件来测试任务后对感知能力的影响。对于方法-掌握目标条件,我们发现内在动机、感知选择、任务选择和任务重要性观点是主要影响因素。此外,我们发现高度积极反馈条件对感知能力的主要影响与只给予积极反馈相比。这些结果表明,在完成具有挑战性的任务时,掌握目标与表现目标之间的差异,以及在反馈条件下使用更积极的反馈。
{"title":"Motivational Effects of Goal Orientation","authors":"Charles N. Elliott, Paul A. Story","doi":"10.32727/25.2019.18","DOIUrl":"https://doi.org/10.32727/25.2019.18","url":null,"abstract":"According to achievement goal theory, individuals set mastery or performance goals to accomplish challenging tasks. In addition, they can either approach or avoid the goal they are achieving. Mastery goals show positive correlation to intrinsic motivation while performance goals are linked to extrinsic motivation. Goal setting also affects motivation for completing tasks and perception of self-efficacious behavior while performing tasks. Receiving feedback has been positively correlated with success in learning and intrinsic motivation. The present research manipulates goal orientation through the accomplishment of a word find in an online experimental setting to test the effect on feedback, intrinsic motivation, choice, and self-efficacy. Positive versus highly positive feedback conditions were used after the word find to test effects on perceived competence following a task. For the approach-mastery goal condition, we found main effects for intrinsic motivation, perceived choice, task choice, and views of task importance. Additionally, we found a main effect for perceived competence for our highly positive feedback condition versus giving just positive feedback. These results demonstrate support for accomplishing challenging tasks with mastery goals versus performance goals and the usage of more positive feedback in a feedback condition.","PeriodicalId":22986,"journal":{"name":"The Journal of Undergraduate Research","volume":"81 1","pages":"4"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80499905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
The Danger of Unqualified Dance Instruction in Private Dance Studios and Social Media 私人舞蹈工作室和社交媒体中不合格舞蹈教学的危险
Pub Date : 2017-01-01 DOI: 10.32727/25.2019.22
Angelina M Pellini
While dance classes have become a popular activity for children in the United States, most people are unaware as to what constitutes “quality” dance instruction. This idea has been addressed at a collegiate level yet the lack of standards for dance instruction at the studio level has been overlooked. This research draws attention to this issue and the need for a potential solution to the problem. The project strives to answer these questions: Is there a trend between the lack of standards for dance education and the prevalence of injuries in young dancers? If so, is there a way to address this and establish a detailed set of qualifications that instructors need to meet in order to teach dance? The hypothesis proposes that poor instruction leads to an increase in injuries in young dance students. Furthermore, ineffective instruction is a disservice to students hoping to seek careers in professional dance.
虽然舞蹈课在美国已经成为一项受孩子们欢迎的活动,但大多数人都不知道什么是“高质量”的舞蹈教学。这个想法已经在大学层面上得到了解决,但在工作室层面上缺乏舞蹈教学标准却被忽视了。这项研究引起了人们对这个问题的关注,并需要一个潜在的解决方案。该项目努力回答这些问题:缺乏标准的舞蹈教育和年轻舞者受伤的流行之间是否存在一种趋势?如果是这样,有没有办法解决这个问题,并建立一套详细的资格证书,教练需要满足才能教舞蹈?该假说提出,不良的指导导致年轻舞蹈学生受伤的增加。此外,无效的指导对希望从事专业舞蹈职业的学生来说是一种伤害。
{"title":"The Danger of Unqualified Dance Instruction in Private Dance Studios and Social Media","authors":"Angelina M Pellini","doi":"10.32727/25.2019.22","DOIUrl":"https://doi.org/10.32727/25.2019.22","url":null,"abstract":"While dance classes have become a popular activity for children in the United States, most people are unaware as to what constitutes “quality” dance instruction. This idea has been addressed at a collegiate level yet the lack of standards for dance instruction at the studio level has been overlooked. This research draws attention to this issue and the need for a potential solution to the problem. The project strives to answer these questions: Is there a trend between the lack of standards for dance education and the prevalence of injuries in young dancers? If so, is there a way to address this and establish a detailed set of qualifications that instructors need to meet in order to teach dance? The hypothesis proposes that poor instruction leads to an increase in injuries in young dance students. Furthermore, ineffective instruction is a disservice to students hoping to seek careers in professional dance.","PeriodicalId":22986,"journal":{"name":"The Journal of Undergraduate Research","volume":"71 1","pages":"2"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83941424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Use of An Alternative Natural Weed Suppressant: Effects of Parboiled Rice Hill Mulch on the Growth of Container Weeds 另一种天然杂草抑制剂的使用:覆盖稻谷对容器杂草生长的影响
Pub Date : 2017-01-01 DOI: 10.32727/25.2019.26
Amy R Fields-Taylor, Vanessa Slinger-Friedman
The Chattahoochee Nature Center (CNC) is one of the leading educational centers in Georgia about the ecology of the Chattahoochee River. Due to lack of man power, keeping down the weeds in the CNC plant nursery is one of those tasks that often gets left undone. The nursery becomes overgrown with invasive weed species. Understandably, they must sometimes resort to the use of herbicides, such as Roundup®, to keep the hundreds of native and endangered species of plants housed at CNC from being choked out by invasive weeds. This study tests the ability to suppress weed growth by use of Parboiled Rice Hulls (PBH), a biodegradable by-product of the rice industry used as an eco-friendly mulch or soil additive. As a result of this study the CNC has planned to implement the use of PBH as a mulch material to dramatically decrease use of herbicides.
查塔胡奇河自然中心(CNC)是乔治亚州关于查塔胡奇河生态的主要教育中心之一。由于缺乏人力,在CNC苗圃中清除杂草是经常被遗漏的任务之一。苗圃长满了入侵的杂草。可以理解的是,他们有时必须使用除草剂,如农达®,以防止CNC的数百种本地和濒危植物被入侵的杂草扼杀。这项研究测试了使用煮熟的稻壳(PBH)抑制杂草生长的能力,这是一种可生物降解的稻壳副产品,被用作生态友好的地膜或土壤添加剂。作为这项研究的结果,CNC计划使用PBH作为覆盖材料,以显着减少除草剂的使用。
{"title":"Use of An Alternative Natural Weed Suppressant: Effects of Parboiled Rice Hill Mulch on the Growth of Container Weeds","authors":"Amy R Fields-Taylor, Vanessa Slinger-Friedman","doi":"10.32727/25.2019.26","DOIUrl":"https://doi.org/10.32727/25.2019.26","url":null,"abstract":"The Chattahoochee Nature Center (CNC) is one of the leading educational centers in Georgia about the ecology of the Chattahoochee River. Due to lack of man power, keeping down the weeds in the CNC plant nursery is one of those tasks that often gets left undone. The nursery becomes overgrown with invasive weed species. Understandably, they must sometimes resort to the use of herbicides, such as Roundup®, to keep the hundreds of native and endangered species of plants housed at CNC from being choked out by invasive weeds. This study tests the ability to suppress weed growth by use of Parboiled Rice Hulls (PBH), a biodegradable by-product of the rice industry used as an eco-friendly mulch or soil additive. As a result of this study the CNC has planned to implement the use of PBH as a mulch material to dramatically decrease use of herbicides.","PeriodicalId":22986,"journal":{"name":"The Journal of Undergraduate Research","volume":"16 1","pages":"4"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90897977","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Modeling Internet Traffic Generations Based on Individual Users and Activities for Telecommunication Applications 电信应用中基于个人用户和活动的互联网流量生成建模
Pub Date : 2016-08-31 DOI: 10.33697/AJUR.2016.028
S. Stoudt, Pamela Badian-Pessot, Blanche Ngo Mahop, Erika Earley, J. Menter, Yadira Flores, Danielle Williams, Weijia Zhang, Liza Maharjan, Yixin Bao, L. Rosenbauer, Van Nguyen, V. Mendiratta, N. Tania
ABSTRACT A traffic generation model is a stochastic model of the data flow in a communication network. These models are useful during the development of telecommunication technologies and for analyzing the performance and capacity of various protocols, algorithms, and network topologies. We present here two modeling approaches for simulating internet traffic. In our models, we simulate the length and interarrival times of individual packets, the discrete unit of data transfer over the internet. Our first modeling approach is based on fitting data to known theoretical distributions. The second method utilizes empirical copulae and is completely data driven. Our models were based on internet traffic data generated by different individuals performing specific tasks (e.g. web-browsing, video streaming, and online gaming). When combined, these models can be used to simulate internet traffic from multiple individuals performing typical tasks.
流量生成模型是通信网络中数据流的随机模型。这些模型在电信技术的开发和分析各种协议、算法和网络拓扑的性能和容量时非常有用。我们在这里提出了两种模拟互联网流量的建模方法。在我们的模型中,我们模拟了单个数据包的长度和间隔到达时间,数据包是互联网上数据传输的离散单元。我们的第一种建模方法是基于对已知理论分布的拟合数据。第二种方法利用经验公式,完全是数据驱动的。我们的模型基于不同个体执行特定任务(如网页浏览、视频流和在线游戏)所产生的互联网流量数据。当这些模型结合在一起时,可以用来模拟来自多个执行典型任务的个人的互联网流量。
{"title":"Modeling Internet Traffic Generations Based on Individual Users and Activities for Telecommunication Applications","authors":"S. Stoudt, Pamela Badian-Pessot, Blanche Ngo Mahop, Erika Earley, J. Menter, Yadira Flores, Danielle Williams, Weijia Zhang, Liza Maharjan, Yixin Bao, L. Rosenbauer, Van Nguyen, V. Mendiratta, N. Tania","doi":"10.33697/AJUR.2016.028","DOIUrl":"https://doi.org/10.33697/AJUR.2016.028","url":null,"abstract":"ABSTRACT A traffic generation model is a stochastic model of the data flow in a communication network. These models are useful during the development of telecommunication technologies and for analyzing the performance and capacity of various protocols, algorithms, and network topologies. We present here two modeling approaches for simulating internet traffic. In our models, we simulate the length and interarrival times of individual packets, the discrete unit of data transfer over the internet. Our first modeling approach is based on fitting data to known theoretical distributions. The second method utilizes empirical copulae and is completely data driven. Our models were based on internet traffic data generated by different individuals performing specific tasks (e.g. web-browsing, video streaming, and online gaming). When combined, these models can be used to simulate internet traffic from multiple individuals performing typical tasks.","PeriodicalId":22986,"journal":{"name":"The Journal of Undergraduate Research","volume":"20 1","pages":"53"},"PeriodicalIF":0.0,"publicationDate":"2016-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84538960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Effects of Filament Diameter Tolerances in Fused Filament Fabrication 熔丝加工中丝径公差的影响
Pub Date : 2016-05-31 DOI: 10.14434/IUJUR.V2I1.20917
C. Cardona, Abigail H Curdes, Aaron J Isaacs
Fused filament fabrication (FFF) is one of the most popular additive manufacturing (3D printing) technologies due to the growing availability of low-cost desktop 3D printers and the relatively low cost of the thermoplastic filament used in the 3D printing process. Commercial filament suppliers, 3D printer manufacturers, and end-users regard filament diameter tolerance as an important indicator of the 3D printing quality. Irregular filament diameter affects the flow rate during the filament extrusion, which causes poor surface quality, extruder jams, irregular gaps in-between individual extrusions, and/or excessive overlap, which eventually results in failed 3D prints. Despite the important role of the diameter consistency in the FFF process, few studies have addressed the required tolerance level to achieve highest 3D printing quality. The objective of this work is to develop the testing methods to measure the filament tolerance and control the filament fabrication process. A pellet-based extruder is utilized to fabricate acrylonitrile butadiene styrene (ABS) filament using a nozzle of 1.75 mm in diameter. Temperature and extrusion rate are controlled parameters. An optical comparator and an array of digital calipers are used to measure the filament diameter. The results demonstrate that it is possible to achieve high diameter consistency and low tolerances (0.01mm) at low extrusion temperature (180 °C) and low extrusion rate (10 in/min).
熔融长丝制造(FFF)是最受欢迎的增材制造(3D打印)技术之一,这是由于低成本台式3D打印机的日益普及,以及3D打印过程中使用的热塑性长丝的成本相对较低。商用长丝供应商、3D打印机制造商和终端用户都将长丝直径公差作为3D打印质量的重要指标。不规则的长丝直径会影响长丝挤出过程中的流速,从而导致表面质量差、挤出机堵塞、单个挤出件之间的不规则间隙和/或过度重叠,最终导致3D打印失败。尽管直径一致性在FFF过程中的重要作用,很少有研究解决了所需的公差水平,以实现最高的3D打印质量。本工作的目的是开发测量长丝公差和控制长丝制造过程的测试方法。使用直径1.75 mm的喷嘴,利用球团挤出机制备丙烯腈-丁二烯-苯乙烯(ABS)长丝。控制温度和挤出速率。使用光学比较器和数字卡尺阵列测量灯丝直径。结果表明,在低挤压温度(180℃)和低挤压速率(10 in/min)下,可以实现高直径一致性和低公差(0.01mm)。
{"title":"Effects of Filament Diameter Tolerances in Fused Filament Fabrication","authors":"C. Cardona, Abigail H Curdes, Aaron J Isaacs","doi":"10.14434/IUJUR.V2I1.20917","DOIUrl":"https://doi.org/10.14434/IUJUR.V2I1.20917","url":null,"abstract":"Fused filament fabrication (FFF) is one of the most popular additive manufacturing (3D printing) technologies due to the growing availability of low-cost desktop 3D printers and the relatively low cost of the thermoplastic filament used in the 3D printing process. Commercial filament suppliers, 3D printer manufacturers, and end-users regard filament diameter tolerance as an important indicator of the 3D printing quality. Irregular filament diameter affects the flow rate during the filament extrusion, which causes poor surface quality, extruder jams, irregular gaps in-between individual extrusions, and/or excessive overlap, which eventually results in failed 3D prints. Despite the important role of the diameter consistency in the FFF process, few studies have addressed the required tolerance level to achieve highest 3D printing quality. The objective of this work is to develop the testing methods to measure the filament tolerance and control the filament fabrication process. A pellet-based extruder is utilized to fabricate acrylonitrile butadiene styrene (ABS) filament using a nozzle of 1.75 mm in diameter. Temperature and extrusion rate are controlled parameters. An optical comparator and an array of digital calipers are used to measure the filament diameter. The results demonstrate that it is possible to achieve high diameter consistency and low tolerances (0.01mm) at low extrusion temperature (180 °C) and low extrusion rate (10 in/min).","PeriodicalId":22986,"journal":{"name":"The Journal of Undergraduate Research","volume":"1 1","pages":"44-47"},"PeriodicalIF":0.0,"publicationDate":"2016-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78627759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 23
The Motivations behind Child Welfare Work 儿童福利工作的动机
Pub Date : 2016-05-31 DOI: 10.14434/IUJUR.V2I1.20928
Samuel J Dickman
This report seeks to explore the findings of a qualitative research study concerning the motivations behind child welfare work. Child welfare is a major field within the social work profession that demands a great deal of expertise and effort from workers. Professionals employed as case managers within the child welfare field are held accountable for a wide variety of social work roles, often placing these individuals at risk of emotional trauma and high levels of work-related stress. Due to this, workers who remain in the field for extensive periods of time often experience strong sensations of purpose relative to their work. Our study found that child welfare caseworkers were motivated by altruism and a deep desire to improve the lives of their clients.  They were also kept motivated by the successes that came from time to time. While trials seem to be experienced on a regular basis, child welfare caseworkers generally found their work to be a positive presence within the families they serve. Further research is needed to expound upon the findings of this study.
本报告旨在探讨一项关于儿童福利工作背后动机的定性研究的结果。儿童福利是社会工作专业的一个主要领域,需要大量的专业知识和工作者的努力。儿童福利领域的专业人员被聘为个案管理人员,负责各种各样的社会工作角色,经常将这些人置于情感创伤和高水平工作压力的风险中。正因为如此,在某一领域长时间工作的工人往往会感受到与工作相关的强烈的使命感。我们的研究发现,儿童福利工作者的动机是利他主义和改善客户生活的强烈愿望。不时出现的成功也激励着他们。虽然审判似乎经常发生,但儿童福利案件工作者通常发现他们的工作在他们所服务的家庭中是一种积极的存在。需要进一步的研究来阐述这项研究的结果。
{"title":"The Motivations behind Child Welfare Work","authors":"Samuel J Dickman","doi":"10.14434/IUJUR.V2I1.20928","DOIUrl":"https://doi.org/10.14434/IUJUR.V2I1.20928","url":null,"abstract":"This report seeks to explore the findings of a qualitative research study concerning the motivations behind child welfare work. Child welfare is a major field within the social work profession that demands a great deal of expertise and effort from workers. Professionals employed as case managers within the child welfare field are held accountable for a wide variety of social work roles, often placing these individuals at risk of emotional trauma and high levels of work-related stress. Due to this, workers who remain in the field for extensive periods of time often experience strong sensations of purpose relative to their work. Our study found that child welfare caseworkers were motivated by altruism and a deep desire to improve the lives of their clients.  They were also kept motivated by the successes that came from time to time. While trials seem to be experienced on a regular basis, child welfare caseworkers generally found their work to be a positive presence within the families they serve. Further research is needed to expound upon the findings of this study.","PeriodicalId":22986,"journal":{"name":"The Journal of Undergraduate Research","volume":"13 1","pages":"48-53"},"PeriodicalIF":0.0,"publicationDate":"2016-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74786776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Tracks in the Snow 雪中的足迹
Pub Date : 2016-05-31 DOI: 10.14434/IUJUR.V2I1.20925
Bradford Taylor
In 2000, Subhankar Banerjee set out for the Arctic National Wildlife Refuge to photograph polar bears in a “place untrammeled by tourism or industry” (Banerjee, 2008). This paper explores a number of threads regarding Banerjee’s artistic journey from descriptive to interpretive work, including the role of politics in Banerjee’s evolution as an artist and environmental activist and comparisons of his different publications over time. Along with providing context for Banerjee’s work, this paper investigates the unique avenues through which Banerjee’s photography challenges the traditional paradigm of a pristine wilderness by reconceiving its spacial representations in exhibitions and books highlighting the presence of humans in the Arctic. Research was primarily conducted through an analysis of both photographic and textual elements of Banerjee’s publications and a conversation with Banerjee.
2000年,Subhankar Banerjee前往北极国家野生动物保护区,在一个“不受旅游业或工业限制的地方”拍摄北极熊(Banerjee, 2008)。本文探讨了班纳吉从描述性作品到解释性作品的艺术历程,包括政治在班纳吉作为艺术家和环境活动家的演变过程中所扮演的角色,以及对他不同出版物的比较。除了为Banerjee的作品提供背景外,本文还研究了Banerjee的摄影作品挑战原始荒野传统范式的独特途径,通过重新构想其在展览和书籍中的空间表征来突出人类在北极的存在。研究主要是通过分析Banerjee出版物的照片和文本元素以及与Banerjee的对话进行的。
{"title":"Tracks in the Snow","authors":"Bradford Taylor","doi":"10.14434/IUJUR.V2I1.20925","DOIUrl":"https://doi.org/10.14434/IUJUR.V2I1.20925","url":null,"abstract":"In 2000, Subhankar Banerjee set out for the Arctic National Wildlife Refuge to photograph polar bears in a “place untrammeled by tourism or industry” (Banerjee, 2008). This paper explores a number of threads regarding Banerjee’s artistic journey from descriptive to interpretive work, including the role of politics in Banerjee’s evolution as an artist and environmental activist and comparisons of his different publications over time. Along with providing context for Banerjee’s work, this paper investigates the unique avenues through which Banerjee’s photography challenges the traditional paradigm of a pristine wilderness by reconceiving its spacial representations in exhibitions and books highlighting the presence of humans in the Arctic. Research was primarily conducted through an analysis of both photographic and textual elements of Banerjee’s publications and a conversation with Banerjee.","PeriodicalId":22986,"journal":{"name":"The Journal of Undergraduate Research","volume":"1 1","pages":"29-33"},"PeriodicalIF":0.0,"publicationDate":"2016-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76089239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Endosymbiont bacteria Holospora undulata confers oxidative tolerance in host Paramecium caudatum 内共生细菌波状全息孢子菌赋予宿主尾草履虫氧化耐受性
Pub Date : 2016-05-31 DOI: 10.14434/IUJUR.V2I1.20912
R. A. Stewart
Paramecium is a genus of ciliated protozoan that, while unicellular, has a complex intracellular structure, comparable to Metazoan cells, which has made them excellent models for the study of genetics and cellular functions. Holospora undulata is a bacterial endosymbiont specific to the species Paramecium caudatum ; they are unable to grow outside of P. caudatum . The presence of this endosymbiont has proven to have an effect on the subsequent gene expression and cellular maintenance of its host cells. Recent studies have demonstrated that infection by H. obtusa increases the expression of host heat-shock genes and leads to both resistance at normally-lethal high temperatures and heat resistance in ciliary movement (Fujishima, Kawai, & Yamamoto, 2005; Hori & Fujishima, 2003). Heat-shock resistance occurs because bacterial DNA triggers the upregulation of its P. caudatum host’s heat-shock genes ( i.e. , hsp60 and hsp70), although the mechanisms are not known (Hori & Fujishima, 2003). These studies demonstrate that infection of P. caudatum by H. undulata  (a closely-related species to H. obtusa ) induces heat-shock resistance, but fail to address whether H. undulata protects against other common environmental stressors such as oxidative damage. To determine if infection by H. undulata has the ability to induce additional tolerances, we examined differences in oxidative tolerance, based on percent survival, between P. caudatum with and without H. undulata infection. Samples of both lines were treated with increasing concentrations of hydrogen peroxide, the number of surviving cells were counted, and the percent survivability of each sample was calculated. There was an approximate 20% increase in survival when P. caudautum was infected with H. undulata —thus H. undulata infections confer oxidative tolerance. Further studies will be conducted to determine if an increase in survivability occurs in response to other damaging mechanisms. Future work will also investigate if the genes responsible for oxidative damage repair are upregulated, in addition to the already characterized heat-shock genes.
草履虫是一种纤毛原生动物,虽然单细胞,但具有复杂的细胞内结构,可与后生动物细胞相媲美,这使它们成为研究遗传学和细胞功能的绝佳模型。波状全息孢子虫是尾草履虫特有的细菌内共生菌;它们不能在尾状茎外生长。这种内共生体的存在已被证明对其宿主细胞的后续基因表达和细胞维持有影响。最近的研究表明,受黑僵菌感染增加了宿主热休克基因的表达,并导致宿主在正常致死高温下的抗性和纤毛运动中的耐热性(Fujishima, Kawai, & Yamamoto, 2005;Hori & Fujishima, 2003)。热休克抗性的发生是因为细菌DNA触发了其尾状疟原虫宿主热休克基因(即hsp60和hsp70)的上调,尽管其机制尚不清楚(Hori & Fujishima, 2003)。这些研究表明,波状芽孢杆菌(H. undulata,与H. obtusa密切相关的物种)感染尾状芽孢杆菌(P. caudatum)可诱导热休克抗性,但未能说明波状芽孢杆菌是否能抵抗其他常见的环境应激源,如氧化损伤。为了确定波状螺旋菌感染是否有能力诱导额外的耐受性,我们基于存活率,研究了波状螺旋菌感染和未感染尾尾假单胞菌之间氧化耐受性的差异。两系的样品都用浓度增加的双氧水处理,计数存活细胞的数量,计算每个样品的存活率。当P. caudautum被H.波动菌感染时,存活率大约增加了20%,因此H.波动菌感染赋予了氧化耐受性。将进行进一步的研究,以确定生存能力的增加是否会对其他损伤机制作出反应。除了已知的热休克基因外,未来的工作还将研究负责氧化损伤修复的基因是否被上调。
{"title":"Endosymbiont bacteria Holospora undulata confers oxidative tolerance in host Paramecium caudatum","authors":"R. A. Stewart","doi":"10.14434/IUJUR.V2I1.20912","DOIUrl":"https://doi.org/10.14434/IUJUR.V2I1.20912","url":null,"abstract":"Paramecium is a genus of ciliated protozoan that, while unicellular, has a complex intracellular structure, comparable to Metazoan cells, which has made them excellent models for the study of genetics and cellular functions. Holospora undulata is a bacterial endosymbiont specific to the species Paramecium caudatum ; they are unable to grow outside of P. caudatum . The presence of this endosymbiont has proven to have an effect on the subsequent gene expression and cellular maintenance of its host cells. Recent studies have demonstrated that infection by H. obtusa increases the expression of host heat-shock genes and leads to both resistance at normally-lethal high temperatures and heat resistance in ciliary movement (Fujishima, Kawai, & Yamamoto, 2005; Hori & Fujishima, 2003). Heat-shock resistance occurs because bacterial DNA triggers the upregulation of its P. caudatum host’s heat-shock genes ( i.e. , hsp60 and hsp70), although the mechanisms are not known (Hori & Fujishima, 2003). These studies demonstrate that infection of P. caudatum by H. undulata  (a closely-related species to H. obtusa ) induces heat-shock resistance, but fail to address whether H. undulata protects against other common environmental stressors such as oxidative damage. To determine if infection by H. undulata has the ability to induce additional tolerances, we examined differences in oxidative tolerance, based on percent survival, between P. caudatum with and without H. undulata infection. Samples of both lines were treated with increasing concentrations of hydrogen peroxide, the number of surviving cells were counted, and the percent survivability of each sample was calculated. There was an approximate 20% increase in survival when P. caudautum was infected with H. undulata —thus H. undulata infections confer oxidative tolerance. Further studies will be conducted to determine if an increase in survivability occurs in response to other damaging mechanisms. Future work will also investigate if the genes responsible for oxidative damage repair are upregulated, in addition to the already characterized heat-shock genes.","PeriodicalId":22986,"journal":{"name":"The Journal of Undergraduate Research","volume":"43 1","pages":"41"},"PeriodicalIF":0.0,"publicationDate":"2016-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81943433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Learning About Letters Through Handwriting Practice 通过书写练习学习字母
Pub Date : 2016-05-31 DOI: 10.14434/IUJUR.V2I1.20924
D. Zemlock
The influence of visual-motor experiences with written symbols on pre-reading abilities, such as letter knowledge, have been shown to be facilitatory in both correlational studies on very young children and in experimental studies on older children.  However, it is not known whether any fine-motor practice will create this benefit, whether it is specific to writing letters, or whether certain ages would benefit most from handwriting practice. Here, we hypothesized that immature fine-motor skill that produces variable forms may be crucial to the beneficial effects of handwriting training – predicting the younger children would benefit more from the training than older children. Preschool-aged children, ages three to five years, were divided into two experimental groups (letter-writing, digit-writing) in a 2x2x2 design: TIME (pre, post), AGE (younger, older), and CONDITION (letter-writing, digit-writing). Each group received six weeks of training. The letter-writing and digit-writing groups practiced writing letters (A-Z) or single digits (0-9), respectively, four times per week. Before and after the training period, each group received assessments targeting letter knowledge directly. We predicted that the younger age group, compared to the older age group, in the letter-writing condition would score significantly higher on the letter knowledge tasks at post-test than at pre-test and that this effect would not occur in the digit-writing group. Results demonstrated that the younger children did show a significantly greater improvement in letter recognition skills than the older age group, but this effect held for both the letter-and digit- writing groups.  These results suggest, therefore, that any fine-motor practice at a young age can facilitate letter knowledge.
书写符号的视觉运动体验对阅读前能力(如字母知识)的影响,在针对幼儿的相关研究和针对较大儿童的实验研究中都被证明是促进性的。然而,目前尚不清楚是否任何精细运动练习都能产生这种好处,是否只针对写信,或者是否某些年龄的人最能从书法练习中受益。在这里,我们假设不成熟的精细运动技能产生的各种形式可能对手写训练的有益效果至关重要-预测年龄较小的孩子比年龄较大的孩子从训练中受益更多。采用2x2x2设计,将3 - 5岁学龄前儿童分为两个实验组(写信、写数字):时间组(写信前、写信后)、年龄组(年龄小、年龄大)和条件组(写信、写数字)。每组接受六周的训练。字母书写组和数字书写组分别练习书写字母(A-Z)和单个数字(0-9),每周练习四次。培训前后,每组直接接受针对字母知识的评估。我们预测,与年龄较大的组相比,年龄较小的组在字母写作条件下,在测试后的字母知识任务上的得分明显高于测试前的得分,而这种影响不会发生在数字写作组。结果表明,年龄较小的孩子在字母识别技能上确实比年龄较大的孩子表现出更大的进步,但这种效果对字母和数字书写组都有效。因此,这些结果表明,在年轻的时候,任何精细的运动练习都可以促进字母知识。
{"title":"Learning About Letters Through Handwriting Practice","authors":"D. Zemlock","doi":"10.14434/IUJUR.V2I1.20924","DOIUrl":"https://doi.org/10.14434/IUJUR.V2I1.20924","url":null,"abstract":"The influence of visual-motor experiences with written symbols on pre-reading abilities, such as letter knowledge, have been shown to be facilitatory in both correlational studies on very young children and in experimental studies on older children.  However, it is not known whether any fine-motor practice will create this benefit, whether it is specific to writing letters, or whether certain ages would benefit most from handwriting practice. Here, we hypothesized that immature fine-motor skill that produces variable forms may be crucial to the beneficial effects of handwriting training – predicting the younger children would benefit more from the training than older children. Preschool-aged children, ages three to five years, were divided into two experimental groups (letter-writing, digit-writing) in a 2x2x2 design: TIME (pre, post), AGE (younger, older), and CONDITION (letter-writing, digit-writing). Each group received six weeks of training. The letter-writing and digit-writing groups practiced writing letters (A-Z) or single digits (0-9), respectively, four times per week. Before and after the training period, each group received assessments targeting letter knowledge directly. We predicted that the younger age group, compared to the older age group, in the letter-writing condition would score significantly higher on the letter knowledge tasks at post-test than at pre-test and that this effect would not occur in the digit-writing group. Results demonstrated that the younger children did show a significantly greater improvement in letter recognition skills than the older age group, but this effect held for both the letter-and digit- writing groups.  These results suggest, therefore, that any fine-motor practice at a young age can facilitate letter knowledge.","PeriodicalId":22986,"journal":{"name":"The Journal of Undergraduate Research","volume":"110 1","pages":"56-62"},"PeriodicalIF":0.0,"publicationDate":"2016-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75867717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Why Do Boys Love Frozen, a Disney Princess Movie? 为什么男孩喜欢迪士尼公主电影《冰雪奇缘》?
Pub Date : 2016-05-31 DOI: 10.14434/IUJUR.V2I1.20923
P. E. Butler
This project involves the analysis of both primary and secondary sources to investigate what caused men from three towns in Indiana to volunteer to fight in the Spanish-American War, a conflict that they had no personal reason to join. The predominantly-used primary sources were newspapers from the three towns in Indiana and speeches by politicians. These three towns were selected after careful analysis of demographic information including population and number of volunteers in the Spanish-American War from every major city in the state. To further expand on these ideas, political leanings and occupations were taken into account. Upon completing this study, it was discovered that both the rhetoric of pro-imperial politicians, the propaganda that filled the newspapers of the time, and the creation of the concept of glory and the valor that could be won through combat had an effect on the men’s decision to register for a conflict in which the soldiers had no personal stake.
这个项目包括对第一手资料和第二手资料的分析,以调查是什么原因导致印第安纳州三个城镇的人自愿参加美西战争,他们没有个人原因参加这场战争。主要使用的主要来源是印第安纳州三个城镇的报纸和政治家的演讲。这三个城镇是在仔细分析了该州每个主要城市的人口和参加美西战争的志愿者人数等人口统计信息后选出的。为了进一步扩展这些想法,考虑了政治倾向和职业。在完成这项研究后,人们发现,亲帝国政治家的言辞、充斥在当时报纸上的宣传,以及通过战斗可以赢得的荣耀和英勇概念的创造,都影响了士兵们决定参加一场没有个人利益的冲突。
{"title":"Why Do Boys Love Frozen, a Disney Princess Movie?","authors":"P. E. Butler","doi":"10.14434/IUJUR.V2I1.20923","DOIUrl":"https://doi.org/10.14434/IUJUR.V2I1.20923","url":null,"abstract":"This project involves the analysis of both primary and secondary sources to investigate what caused men from three towns in Indiana to volunteer to fight in the Spanish-American War, a conflict that they had no personal reason to join. The predominantly-used primary sources were newspapers from the three towns in Indiana and speeches by politicians. These three towns were selected after careful analysis of demographic information including population and number of volunteers in the Spanish-American War from every major city in the state. To further expand on these ideas, political leanings and occupations were taken into account. Upon completing this study, it was discovered that both the rhetoric of pro-imperial politicians, the propaganda that filled the newspapers of the time, and the creation of the concept of glory and the valor that could be won through combat had an effect on the men’s decision to register for a conflict in which the soldiers had no personal stake.","PeriodicalId":22986,"journal":{"name":"The Journal of Undergraduate Research","volume":"SE-2 1","pages":"19-28"},"PeriodicalIF":0.0,"publicationDate":"2016-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84628945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
期刊
The Journal of Undergraduate Research
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1