An Examination of Six “Nutting Stones” from East Texas for Plant Phytoliths

In this article we report on an examination of six nutting stones from East Texas sites as well as an exploratory examination of their possible functions. “Nutting stones” have long been presumed to have been used prehistorically for crushing nuts such as hickory, etc. as foodstuffs. In fact Davis described them as being: A small flat stone, usually made of limestone, sandstone or other sedimentary types of rock which could be carried by hand. The flat surface may have one or more ground or pecked cups of various sizes, shapes and depth. It is postulated that they were used for various purposes such as cracking nuts, mixing pigments, milling herbs and seeds, or as an anvil for flint knapping. While Davis is an avocationalist and numerous professional archaeologists have dealt with nutting stones, we know of neither a more complete definition nor any other effort to empirically test for their function

The tolerance of soybeans to atrazine, 2-chloro-4(ethylamino)-6- (isopropyl amino)-S-triazine

Call number: LD2668 .T4 1978 B69Master of Scienc

Environmental Liens and Title Insurance

Increased concern for the environment and environmental protection laws have affected title insurance. To understand this effect, it is necessary to examine our environmental problems, the environmental laws and the nature of title insurance. This article also looks at the title insurance industry\u27s reaction to these environmental risks as compared to the reaction of the property/casualty insurance industry

Statistical Study of the Effect of Implementing an Airveyor System on the Warpage of Injection Molded Closures

Berry Global in Bowling Green, Kentucky produces predominantly polypropylene container closures. One variant, the 83mm lined jar closure, is produced by first being injection molded, placed in work-in-progress (WIP) hold for 24 hours to cool, and then finished through the auxiliary liner operation into a final product. While this process is an effective method to produce a quality large-diameter closure and allows the polypropylene adequate time to cool without warping out of shape, the 24-hour WIP time and the manpower needed to accomplish this can negatively impact several business metrics as well as employee safety. The purpose of this thesis was to document the application of Six Sigma to improve the process of manufacturing 83mm lined jar closures. This was completed by executing the define, measure, analyze, improve, and control (DMAIC) process at the heart of Six Sigma to define the process, measure current WIP and desired airveyor continuous flow process metrics to analyze any impact to the closure, and put controls in place to ensure the improved process was stable. The project resulted in a successful application of the Six Sigma methodology and positive variable data results supporting a recommendation for the change to a continuous flow airveyor process

The Effect of Grade Level, Achievement, and Type of Task on Metacognitive Awareness in Elementary Mathematics

Metacognition is an awareness of how one thinks and learns. It includes an awareness of the strategies used to learn as well as an awareness of oneself as a learner. The purpose of this study was to describe children's metacognitive awareness during a classroom type task. A further purpose was to determine how grade level, achievement, and type of task influence this awareness. One hundred sixty-eight fourth, sixth, and eighth grade boys and girls were classified as high or low math achievers based on their performance on the Comprehensive Test of Basic Skills, a group achievement test. These children were then randomly selected to receive either known or unknown math problems. The known math task was operationally defined as one that was easy; it was a problem that the children would be able to solve. The unknown task was operationally defined as one that was difficult, it was a math problem that these children would find unsolvable. lmmediately following the task, the children were given feedback about their performance and were then asked to identify types of thoughts they may have had as they were working on the problems. The types of thoughts included general and specific strategies as well as ability and effort self-evaluations. A 3 x 2 x 2 factorial analysis of variance design was used with Grade Level (four, six, and eight), Achievement (high and low), and Type of Task (known and unknown) as the between subjects factors. Findings showed that a known task elicited positive ability and effort self-evaluations for success. An unknown task evoked the use of more specific strategies than a known task. A grade level difference in metacognitive awareness showed that young children reported more metacognitive thoughts than older children

Eldre65: Creating a Website for Senior Adults Based Upon User Experience

Geoffrey Chaucer wrote, “Time and tide wait for no man.” He was correct. Aging is universal. It affects all humans in positive and negative ways. From children becoming teens to adults becoming senior adults, each stage of life brings changes and challenges. In one’s forties, menus can become harder to read, hair can fall out, hearing in loud environments can become difficult. Then, in one’s mid-sixties, more difficult challenges can arrive. Health issues such as high blood pressure, diabetes, lung disease can become a regular part of one’s life. Cognition slowness, vision and hearing loss can create difficulties not only in interacting in social settings, but also managing one’s life online. Technology develops and expands constantly. Professor Peter-Paul Verbeek, distinguished Professor of Philosophy of Technology at the Department of Philosophy of the University of Twente, examined how technology, in its purest form, should be a form of mediation for its users. Technology should not be the focus, it should be the median by which you relate to the world around you. “The central idea in mediation theory is that technologies do not simply create connections between users and their environment, but that they actively help to constitute them” (Verbeek). Technology influences the way the user sees the world around them. When made usable, technology can present large positives in an individual’s life. Technology can allow a viewer who is quarantined at home the opportunity to explore a new country. Technology can also bring shopping and banking to your fingertips. It can give the immobile user the freedom to be self-reliant. Medicine, food, and cleaning needs can all be purchased using many different technologies. A user can refill medications using a finger on a smart phone, smart watch, tablet, or computer. Or they can simply use their voice on technologies like Alexa, Echo, and Siri. Technology makes these possibilities endless. But for technology to do all these wonderful things, it needs to be designed and developed in a way that does not leave certain users behind. There must be a standard that designers follow to keep technology, specifically websites, usable and accessible to all. User inclusivity is the most important component that technology needs to focus upon, and where it is falling the most behind. If the user cannot see the words on the screen, hear a video on a site, or understand how to navigate through pages, then technology and all the wonderful things it can do are useless

Investigation of Dinoflagellate Plastid Protein Transport using Heterologous and Homologous in vivo Systems

Expressed Sequence Tag (EST) data from Ceratium horridum generated and analyzed in this thesis conform to the general parameters of dinoflagellate EST libraries. Comparison with diatom and plant transit peptides, revealed that transit peptides from peridinin-containing dinoflagellate conform to general trends for transit peptides but are relatively deficient in hydroxylated amino acids, have a slight net positive charge, and contain N-terminal basic amino acids among the most N-terminal amino acids. Like transit peptides in the alveolate Plasmodium falciparum, dinoflagellate transit peptides contain positively charged amino acids, have a depleted acidic residue content, and mostly contain one or more chaperone binding sites. The feature of dinoflagellate transit peptides that has gone unnoticed heretofore is the low overall positive charge, in addition to the significant division of charge between C- and N-termini. Despite its overwhelming prominence in dinoflagellate transit peptides, C-terminal negative charge clearly had no impact on the import competence of Amphidinium carterae targeting signals in heterologous in vivo systems. Based on results from transfections of Pisum sativum and Phaeodactylum tricornutum, targeting mediated by transit peptides is not merely dependent on net positive charge, N-terminal positive charge, or amino acid content. Therefore, it was concluded that plastid transport into plant and diatom plastids also depended on sequence-specific patterns or motifs that are not present and/or not identical to those in dinoflagellate transit peptides. Based on the partial interchangeability of topogenic signals between an alveolate and a chromist but not between an alveolate and a plant – despite high homologies in mature protein sequences – it was deduced that plastid targeting signals evolve more expediently than the mature protein domains that they intracellularly target. Analysis of the homologous intracompartmental transport of three Amphidinium carterae plastid proteins showed that differing transport routes exist for plastid proteins. While PsbO and Prk are transported by a Golgi-mediated route to the plastid, RbcL is transported directly from the ER to the plastids. In conclusion, a previously undescribed, possibly protein class-dependent, ER-mediated route seems to exist

Teachers\u27 Experiences with Interactions in Online Classes: A Case Study

The purpose of this qualitative case study is to describe the experiences of teachers interacting with students in an online learning environment at Township School District. The theory guiding this study is Moore’s transactional distance theory as it examines how meaningful interactions can minimize the transactional distance in distance learning or remote learning environments. Data from teacher interviews, focus groups, and teacher generated writing samples were used to provide an understanding of how teachers support and promote interactions in online learning environments. Participants were teachers with at least one-year experience teaching remotely or online. All participants were from the same medium sized school district in central Illinois, with a student population of nearly 8,000. This study adds to the literature by sharing high school teachers’ perspectives and experiences of creating and supporting interactions in an online learning environment. The central research question asked, “What are the experiences of high school teachers creating and fostering meaningful interactions in online learning environments?” NVivo coding was utilized to identify codes generated directly from participant responses. The results of the study indicated that teachers created and supported a variety of meaningful interactions. Teachers experienced challenges, adopted new teaching strategies, embraced interactive digital content, and gained a new perspective on students’ home life