Relevant bibliographies by topics / Stem section

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Stem section'

Author: Grafiati
Published: 5 June 2025
Last updated: 8 July 2025

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Journal articles on the topic "Stem section"

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Lee, Dong-Han, and Dongkyoo Kim. "A Plan for Applying Extended Reality to an English Textbook for Elementary School Students." STEM Journal 23, no. 3 (2022): 39–52. http://dx.doi.org/10.16875/stem.2022.23.3.39.

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The purpose of this study is to provide application plans for English textbooks for elementary school students through Extended Reality (XR). For this purpose, this study first investigated current trends and issues in the technology of XR including Virtual Reality (VR), Augmented Reality (AR), and Mixed Reality (MR). This study also investigated current studies of the application of XR technology in educational fields. Recent studies showed that applications of XR in English class for elementary school students were very rare. Only a few cases of applications of AR were found to be utilized for English class for elementary schools. Thus, this study suggested a direction of developing English education contents for elementary school students through the application of XR. A practical use of English textbook applied by XR is introduced on the basis of the contents of a textbook unit. Example sections of a class period in a textbook unit applied by XR were proposed. In each section, a developmental plan of class activities applied by XR was offered. In consideration of recent circumstances of technology, cost, and time, a developmental plan of class activities in each section applied was suggested in the order of VR, AR, and MR.
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Burcham, Daniel, Subhadip Ghosh, Leong Eng Choon, and Fong Yok King. "Evaluation of an Infrared Camera Technique for Detecting Mechanically Induced Internal Voids in Syzygium grande." Arboriculture & Urban Forestry 37, no. 3 (2011): 93–98. http://dx.doi.org/10.48044/jauf.2011.013.

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In order to evaluate a proposed tree diagnostic technique employing infrared cameras, research was conducted to evaluate the effect of internal voids on surface temperature using a thermal photographic instrument. Three axial cylindrical voids of increasing size (Void A, 327 cm3; Void B, 745 cm3; Void C, 1159 cm3) were introduced mechanically in 45 cm long stem sections and exposed to direct sunlight. Subsequently, infrared images were collected from two diametrically opposed sides of the stem sections at regular 30-minute intervals over 150 minutes. The collected images were evaluated visually to compare stem features with observed temperature anomalies, and temperature data was extracted from a vertical transect in the infrared images. The data extracted were compared against a control stem section without defects to determine the independent and combined effects of void size and internal position on surface temperature. Mean relative temperature revealed a significant temperature change in the stems containing mechanical voids compared to the control stem. Significant increases in mean relative temperature were recorded on the stems containing Void A and Void B compared to the control. However, there was no significant change in mean relative temperature on the stem section containing Void C.
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Small, Tanya, E. G. Rhoden, A. Woldeghebriel, and G. W. Carver. "KUDZU IN THE SOUTH: AN OLD ALTERNATIVE CROP." HortScience 26, no. 5 (1991): 498a—498. http://dx.doi.org/10.21273/hortsci.26.5.498a.

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Kudzu (Pueraria lobata) has become a pervasive weed in the southeast US. It has been receiving much attention recently and a study was initiated to evaluate the plant as an alternative food and feed source. Kudzu vines were sectioned into; 0-25, 25-50, 50-75 and 75-100 cm and analysed for acid detergent fiber (ADF), neutral detergent fiber (NDF), ash and crude protein content. Leaf ash content of kudzu increased while stem ash content decreased as the vine was sampled from the growing tip. Stem NDF increased from 44.4% at the 0-25 cm section to 57.83% at the 75-100 cm section of the vine, while leaf NDF declined from 52.23 to 39.01% for the same sections. The trend was reversed for ADF in the kudzu leaf and stem. Crude protein content of kudzu ranged from 18.45% at the 0-25 cm section for leaves to 7.42% for stem sections at 75-100 cm. The high crude protein content of kudzu as well as its abundance in the Southeast makes it a good feed source and a potential food source. However, further studies are needed to determine the vitamin content and digestion coefficient to ascertain its suitability as a food and feed source.
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Guedes, N. M. P., and P. H. Jennings. "Somatic Embryogenesis Using Cucumis sativus (L.) Cotyledons." HortScience 31, no. 4 (1996): 630c—630. http://dx.doi.org/10.21273/hortsci.31.4.630c.

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To improve somatic embryogenesis of Cucumis sativus, two types of explants (cotyledons and stem sections) were cultured on Murashige and Skoog (MS) media supplemented with 2,4-D (2.0 mg·L–1) + kinetin (0.5 mg·L–1). After 4 weeks, the embryogenic callus was transferred for 2 weeks to MS + NAA (1.0 mg·L–1) for embryo development. Stem sections failed to develop embryos while cotyledons responded with 14% embryo formation. The embryos were transferred to MS without hormones for 4 weeks to allow for plantlet growth. These embryos developed only shoots. To improve on the successful generation of embryos with root and shoot development, the procedures used above were repeated, but the cotyledons were cut into three sections to be used as explants. Each transverse section of the cotyledon was approximately 2–3 mm wide. All sections produced callus but not all of them were embryogenic. From the first section (cotyledon base), the second (between the first and third section) and the third section (furthest from the cotyledon base), respectively, 58%, 31%, and 5% embryo development occurred. Those embryos from the basal cotyledon sections regenerated 10 plantlets, 5 with shoots and roots and 5 with only shoots. Approaches to enhance somatic embryogenesis, and shoot and root development, will be discussed.
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Henry, Paul H., and John E. Preece. "Production of Shoots from Dormant Species of Acer as Influenced by Length and Caliper of Stem Sections." Journal of Environmental Horticulture 15, no. 3 (1997): 153–56. http://dx.doi.org/10.24266/0738-2898-15.3.153.

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Abstract Stem sections removed from selected, dormant species of Acer L. (maples) were forced to produce softwood shoots under greenhouse conditions. Species and clones varied widely in the percentage of stem sections forming shoots, and in the number of shoots that were generated per section. Both length and diameter of sections influenced the number of shoots that were generated. With respect to length, it was best to use stem sections of 30 to 40 cm (11.8 to 15.7 in) since longer sections failed to produce additional shoots and occupied considerably more production space. Effect of increased stem diameter varied across species. For A. rubrum, the number of shoots produced was greatest on ‘large’ diameter (5.2 to 7.6 cm; 2.0 to 3.0 in) stem sections; shoot production was greatest on ‘medium’ diameter (3.3 to 5.1 cm; 1.3 to 2.0 in) stem sections of A. palmatum. Data indicate that an optimum diameter will have to be determined for each species that is propagated when using this method.
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Valleser, V. C. "Exogenous application of gibberellic acid on lateral bud emergence in pineapple propagated through stem cuttings." Food Research 7, no. 5 (2023): 297–301. http://dx.doi.org/10.26656/fr.2017.7(5).010.

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The effects of gibberellic acid (GA3) on lateral bud emergence in pineapple stem is still not known. Hence, this study was conducted. ‘MD2’ pineapple stems were sectioned into vertical halves. The first half served as the control (untreated). Whereas the other halves were soaked in 500 ppm GA3 for 2 hrs. The study was performed in two trials. Results in both trials show that untreated stem sections produced lateral buds after one week. In contrast, the GA3 treatment prevented the development of buds. In trial 1, only 2 out of 18 stem sections (11.11%) soaked in 500 ppm of GA3 produced buds after one week. In trial 2, GA3-treated stem sections failed to produce buds. The average number of buds emergence per stem section and diameter of lateral buds were consistently better in untreated pineapple stem sections. These findings implied that the exogenous application of GA3 could prevent the emergence of lateral buds in the pineapple stem.
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Schatten, Heide. "Introduction to Stem Cell Special Section." Microscopy and Microanalysis 17, no. 4 (2011): 473. http://dx.doi.org/10.1017/s1431927611011998.

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The prospect of utilizing stem cells for clinical applications has generated an enormous amount of enthusiasm in the stem cell research community and has led to a wealth of new data that offer the possibility for practical applications into clinical translation. Recent advances in stem cell imaging has contributed greatly to the ultimate goal to identify and culture specific cell types for regeneration of tissue that had been affected by disease such as Parkinson's, Alzheimer's, heart disease, muscle diseases, and others.
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Dwinanda, Aldi Rivaldi, Bambang Setia Nugroho, and Aloysius Adya Pramudita. "Modeling of Cavities Detection in The Tree Stemsection Using Radar Vector Network Analyzer (VNA) Elaborating Radon Transform." Journal of Measurements, Electronics, Communications, and Systems 9, no. 1 (2022): 29. http://dx.doi.org/10.25124/jmecs.v9i1.5370.

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Trees are one of the most useful plants for life on earth. However, trees can be harmful due to cavities in the stem sections. Rapid detection is needed to prevent several losses that may arise due to fallen trees. This research identified a hollow and non-hollow tree stem section of flamboyant tree with a sub-surface detection radar system. The sub surface detection radar system was modeled using a Vector Network Analyzer (VNA) connected to a Vivaldi antenna. VNA emitted electromagnetic waves to the tree stem section and subsequently propagated and penetrated hollow tree stem section. The propagation wave met the boundary plane between the wood and the cavity which reflected the electromagnetic waves. The reflected wave was caught by antenna and was display by the VNA as S-Parameter. This research used a Vivaldi antenna with a working frequency of 1 GHz – 10 GHz and a VNA with working frequency 300KHz - 8GHz. The difference in the amplitude of the signal could be seen from the results of cavity measurements made at one point. By implementing circular scanning method with inverse radon transformation, this research could identify a 19 cm diameter wood with a hole of 6 cm and 9.5 cm diameter filled with water, respectively. It was observed that the optimal detection was obtained by placing object between the antennas. This research has signified the application of radar modeled with VNA for detecting the cavities in tree stem section.
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Canne-Hilliker, Judith M., and Christine M. Kampny. "Taxonomic significance of leaf and stem anatomy of Agalinis (Scrophulariaceae) from the U.S.A. and Canada." Canadian Journal of Botany 69, no. 9 (1991): 1935–50. http://dx.doi.org/10.1139/b91-243.

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Features of foliar and stem anatomy of 26 annual and 1 perennial species of North American Agalinis were examined from over 200 population samples. Several species including A. aphylla, A. densiflora, A. filicaulis, A. heterophylla, A. linifolia, A. maritima, and A. oligophylla have distinctive anatomy. Evidence from anatomy supports a reclassification of North American Agalinis at the sectional and subsectional ranks. Agalinis aphylla and A. oligophylla are allied with species of section Erectae, not section Purpureae subsection Setaceae. Agalinis edwardsiana (from section Tenuifoliae) and A. aspera (section Asperae) are most similar to members of section Purpureae subsection Pedunculares. Agalinis tenuifolia (section Tenuifoliae) is similar to species of section Purpureae subsection Purpureae. Anatomical characters range from those usually regarded as xeromorphic to those typical of hydromorphic species. However, different xeromorphic characters are present in species of sections Purpureae, Erectae, and Tenuifoliae. Species of section Purpureae subsection Setaceae have filiform, adaxially grooved leaves; species of section Erectae have narrow, short sclerenchyma-reinforced leaves and very slender stems usually having fiber bundles in their ridges. Species that we retain in section Tenuifoliae have a cylinder of sclerenchyma between the vascular tissues and the fiber-laden cortex. Key words: Agalinis, Scrophulariaceae, anatomy, systematics, taxonomy.
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Pleasants, Kathleen. "Integrative Approaches in Education: Bridging STEM and the Arts." Xpertno International Journal of Interdisciplinary Research 1, no. 1 (2023): 30–42. https://doi.org/10.5281/zenodo.10053569.

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This research embarked on a meticulous exploration of integrative approaches in education, with a predominant focus on the confluence of Science, Technology, Engineering, Arts, and Mathematics (STEAM). The study was woven into a rich tapestry of interdisciplinary inquiry, aiming to unveil the multifaceted dimensions and impacts of STEAM education through a symphony of quantitative and qualitative methodologies. Surveys and interviews paved the path of investigation, leading to a confluence of findings that illuminated the landscape of STEAM with nuanced insights into participant experiences, perceptions, and pedagogical implications. Key findings revealed STEAM education as a vibrant catalyst fostering creativity, engagement, and an inclusive learning environment. However, challenges echoing with the nuances of authentic integration and implementation intricacies also reverberated within the narrative of results. The discussion section traversed through interpretative pathways, connecting empirical evidence with theoretical paradigms, and elucidating recommendations that resonate with future trajectories of research and practice in the vibrant realms of STEAM education.
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Dissertations / Theses on the topic "Stem section"

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Wesser, Andrea Suzette. "User-defined patterning of neural progenitor cells on 3D micropillar arrays using round cross-sectional geometry, specific dimensions and thiol-based chemical adhesion." Orlando, Fla. : University of Central Florida, 2008. http://purl.fcla.edu/fcla/etd/CFE0002054.

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MacArthur, Katherine E. "Quantitative structural and compositional characterisation of bimetallic fuel-cell catalyst nanoparticles using STEM." Thesis, University of Oxford, 2015. http://ora.ox.ac.uk/objects/uuid:6ce29b0c-1e7e-4604-ba5b-22f2ebd03d4e.

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Platinum-based catalysts for hydrogen fuel-cell applications have progressed greatly with the addition of a second element in either a mixed-alloy or core-shell structure. Not only do they contain a reduced amount of the more expensive platinum metal but they have been shown to demonstrate a significant improvement in catalytic activity. Further improvement of these systems can only be made by careful investigation of such catalyst panoparticles on an atomic scale. These nanoparticles provide a significant characterisation challenge due to their minute size and beam sensitivity. A new method of quantifying the annular dark-field (ADF) scanning transmission electron microscope (STEM) signal on an absolute scale has been developed to address this problem. Experimental images are scaled to a fraction of the incident beam intensity from a detector map. The integrated intensity of each individual atomic column is multiplied by the pixel area to yield a more robust imaging parameter: a scattering cross section, σ. Using this cross section approach and simulated reference data, I show it is possible to count the number of atoms in individual columns. With some prior knowledge of the sample, this makes it possible to reconstruct the 3-dimensional structures of pure platinum nanoparticles. Such an approach has subsequently been extended to bimetallic particles here the elements are close in atomic number, using the platinum-iridium system as an example. In the same way that the cross section can be calculated from ADF image intensity, it is possible to calculate an energy dispersive x-ray (EDX) partial scattering cross section, beneficial especially because of the simplicity of its implementation. In sufficiently thin samples such that the number of x-ray counts is linearly proportional to sample thickness, we can determine element-specific atom counts. Finally, it is possible to combine EDX and ADF cross sections to provide us with quantitative structural and compositional information.
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Miroglotta, Marissa L. "A Cross-Sectional Comparison of Psychosocial Adjustment among Spousal Caregivers for Hematopoietic Stem Cell Transplant Patients." Xavier University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=xavier1556140118018044.

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Grude, Olaug Lea. "Near-field photothermal microspectroscopy and far-field vibrational microspectroscopy of ex-vivo stem cells in tissue sections from cornea." Thesis, Lancaster University, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.536040.

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Wesser, Andrea. "USER-DEFINED PATTERNING OF NEURAL PROGENITOR CELLS ON 3D MICROPILLAR ARRAYS USING ROUND CROSS-SECTIONAL GEOMETRY, SPECIFIC DIMEN." Master's thesis, University of Central Florida, 2008. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3973.

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The ability to control stem cell functions, particularly neuronal progenitors, has long since been believed to be the key to successful treatment of neurodegenerative disorders such as Alzheimer's, Parkinson's and accidents involving head trauma. The neurology field calls for many new solutions to address the controlled neural stem cell seeding and placement of cells for neural tissue regeneration. Self-assembled monolayers (SAM) from the alkanethiol group provide a straightforward applicable, reliable treatment for cell adhesion. An ODT/gold treatment was used to adhere the cells to patterned areas, due mainly to a high confluence of cells attracted to it, as well as the viable environment it produced for the cells. Arrays of micropillars, made of SU-8 photoresist, then covered with a thin film of gold and treated with the ODT, created scaffolding allowing manipulation of neural stem cells. Based on multiple trials of observing varying cross-sectional geometric parameters, metal layer thicknesses and the ODT/Gold treatment, this study explores seeding density control, base and circumferential cell population dependence on those parameters.<br>M.S.M.E.<br>Department of Mechanical, Materials and Aerospace Engineering;<br>Engineering and Computer Science<br>Mechanical Engineering MSME
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Walton, Janet Brown. "Partners for Change: A Mixed Methods Case Study of an Intermediary-led Partnership for STEM Education Reform." University of Cincinnati / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1406810984.

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Candelise, Chiara. "Technical and regulatory developments needed to ster grid-connected photovoltaic (PV) within the UK electricity sector." Thesis, Imperial College London, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.523754.

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Meynell, Francis. "Awakening giants : an inquiry into The Natural Step UK's facilitation of sustainable development with sector-leading companies." Thesis, Open University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.397910.

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Weinryb, Noomi. "Free to Conform : A Comparative Study of Philanthropists’ Accountability." Doctoral thesis, Uppsala universitet, Företagsekonomiska institutionen, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-251281.

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Those who are very wealthy may also be extremely free. Independently wealthy philanthropists epitomize this type of freedom. They seem to be able to act in whichever way they please, as long as they respect the limits of the law. Their freedom also implies that they do not experience as much accountability as other funders. Considering philanthropists’ ambitions as policymakers, and given their imposition of performance demands on their grantees, their accountability is relevant to investigate. However, there are no comprehensive comparative studies of philanthropists’ accountability, and there is mainly anecdotal evidence of a lack of accountability being derived from their independent wealth. This dissertation is a study of philanthropists’ accountability. I compare their experienced and exhibited accountability to that of other funders within societies, and I also compare philanthropists’ accountability across societies. I investigate whether philanthropists’ independent wealth influences to whom they are accountable, for what they are accountable, and how they are accountable. To learn about these topics, I examine their accountability relationships, their accountability mechanisms, and how they justify their potentially controversial funding of human embryonic stem cell research. Across these dimensions, I study their legal, financial, hierarchical, peer, professional, political, and fiduciary/social accountability. Empirically, I make a cross-sectional comparison of philanthropists to other funders of human embryonic stem cell research within and across three welfare regimes - liberal California, social democratic Sweden, and statist South Korea. I compare the accountability of independently wealthy philanthropists to that of public agencies, corporations, and fundraising dependent nonprofits. The empirical materials include 101 structured interviews with open-ended questions covering 51 funding organizations, as well as questionnaires explored in ANOVA and social network analysis. The study indicates that philanthropists experience and exhibit less accountability than other funders in some ways, in some contexts. By developing and using a framework to analyze their accountability, I show that philanthropists’ accountability is patterned within the societies in which they fund, and it differs greatly across societies. In California, philanthropists enact themselves as free actors, whereas in Sweden they enact a moral identity as funders of science. In South Korea, there is no clear boundary between philanthropic and corporate accountability. My results point to the contextual limits of philanthropists’ accountability. By enacting their moral identity in a way that conforms to local norms, philanthropists simultaneously retain and enable their continued freedom. In terms of their accountability, philanthropists are free to conform, and they become free by conforming.
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Vallée, Christophe. "Dynamics of the free surface of stratified two-phase flows in channels with rectangular cross-sections." Forschungszentrum Dresden, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:d120-qucosa-86493.

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Stratified two-phase flows were investigated at different test facilities with horizontal test sections in order to provide an experimental database for the development and validation of computational fluid dynamics (CFD) codes. These channels were designed with rectangular cross-sections to enable optimal observation conditions for the application of optical measurement techniques. Consequently, the local flow structure was visualised with a high-speed video camera, delivering data with high-resolution in space and time as needed for CFD code validation. Generic investigations were performed at atmospheric pressure and room temperature in two air/water channels made of acrylic glass. Divers preliminary experiments were conducted with various measuring systems in a test section mounted between two separators. The second test facility, the Horizontal Air/Water Channel (HAWAC), is dedicated to co-current flow investigations. The hydraulic jump as the quasi-stationary discontinuous transition between super- and subcritical flow was studied in this closed channel. Moreover, the instable wave growth leading to slug flow was investigated from the test section inlet. For quantitative analysis of the optical measurements, an algorithm was developed to recognise the stratified interface in the camera frames, allowing statistical treatments for comparison with CFD calculation results. The third test apparatus was installed in the pressure chamber of the TOPFLOW test facility in order to be operated at reactor typical conditions under pressure equilibrium with the vessel atmosphere. The test section representing a flat model of the hot leg of the German Konvoi pressurised water reactor (PWR) scaled at 1:3 is equipped with large glass side walls in the region of the elbow and of the steam generator inlet chamber to allow visual observations. The experiments were conducted with air and water at room temperature and maximum pressures of 3 bar as well as with steam and water at boundary conditions of up to 50 bar and 264°C. Four types of experiments were performed, including generic test cases as well as transient validation cases of typical nuclear reactor safety issues. As an example, the co-current flow experiments simulate the two-phase natural circulation in the primary circuit of a PWR. The probability distribution of the water level measured in the reactor pressure vessel simulator was used to characterise the flow in the hot leg. Moreover, the flooding behaviour in this conduit was investigated with dedicated counter-current flow limitation experiments. A comparison of the flooding characteristics with similar experimental data and correlations available in the literature shows that the channel height is the characteristic length to be used in the Wallis parameter for channels with rectangular cross-sections. Furthermore, for the analysis of steam/water experiments, condensation effects had to be taken into account. Finally, the experimental results confirm that the Wallis similarity is appropriate to scale flooding in the hot leg of a PWR over a large range of pressure and temperature conditions. Not least, different examples of comparison between experiment and simulation demonstrate the possibilities offered by the data to support the development and validation of CFD codes. Besides the comparison of qualitative aspects, it is shown exemplarily how to treat the CFD results in order to enable quantitative comparisons with the experiments.
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Books on the topic "Stem section"

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United States. Advisory Council on Historic Preservation, ed. Working with section 106: Section 106, step-by-step. Advisory Council on Historic Preservation, 1986.

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Meuronen, Vesa. Ash particle erosion on steam boiler convective section. Lappeenranta University of Technology, 1997.

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Simpson, William Turner. Heating times for round and rectangular cross sections of wood in steam. U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 2001.

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Mackay, John R. Power boilers: A guide to Section I of the ASME boiler and pressure vessel code. 2nd ed. ASME Press, 2011.

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Richards, David M. The dos and don'ts of Section 504: Step-by-step training to ensure compliance. LRP Publications, 2004.

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Richards, David M. The dos and don'ts of Section 504: Step-by-step training to ensure compliance. LRP Publications, 2011.

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Maine. Board of Boiler Rules. Boiler rules: Formulated by the Board of Boiler Rules under authority of section 173, Title 26, R.S. 1964 amended ... Maine Dept. of Labor, Bureau of Labor Standards, Boiler Division, 1993.

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Maine. Board of Boiler Rules. Boiler rules: Formulated by the Board of Boiler Rules under authority of section 173, Title 26, R.S. 1964 amended ... Maine Dept. of Labor, Bureau of Labor Standards, Boiler Division, 1989.

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United States. Environmental Protection Agency. Office of Science and Technology. Engineering and Analysis Division. and United States. Environmental Protection Agency. Office of Water., eds. Economic and engineering analyses of the proposed [section] 316(b) new facility rule. U.S. Environmental Protection Agency, Office of Science and Technology, Engineering and Analysis Division, 2000.

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J, Katz Charles, Branson Douglas M, Washington State Bar Association. Corporation, Business & Banking Law Section., and Washington State Bar Association. Continuing Legal Education Committee., eds. A Step ahead: 1989 Corporation, Business & Banking Section mid-year meeting & seminar. WSBA, 1989.

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Book chapters on the topic "Stem section"

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Piispanen, Riikka, Jiri Pyörälä, and Sauli Valkonen. "Wood Properties and Quality." In Managing Forest Ecosystems. Springer Nature Switzerland, 2024. https://doi.org/10.1007/978-3-031-70484-0_9.

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Abstract Trees in continuous cover forestry (CCF) typically form very narrow rings at young ages in suppressed positions but can grow very quickly at older ages in dominant positions, maintaining long-lived crowns. CCF trees have slightly higher mean wood density in stems than rotation forestry (RF) trees. CCF trees have better fiber properties for pulp than RF trees. CCF trees have a relatively short stem section of small dead knots in sawn timber. CCF trees have a relatively long section of large green knots in sawn timber. Sawn goods produced from spruce logs yielded with the selection system do not differ markedly from those from RF. The application of a shelterwood system with overstorey retention for Scots pine facilitates the production of very high-grade timber.
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Borbye, Lisbeth. "Personal Step-by-Step Work Section." In Sustainable Innovation. Springer International Publishing, 2011. http://dx.doi.org/10.1007/978-3-031-02573-0_6.

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Duvernoy, Henri M. "Sagittal sections — Figs. 154–168." In The Human Brain Stem and Cerebellum. Springer Vienna, 1995. http://dx.doi.org/10.1007/978-3-7091-3078-0_9.

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Duvernoy, Henri M. "Axial (horizontal) sections — Figs. 99–127." In The Human Brain Stem and Cerebellum. Springer Vienna, 1995. http://dx.doi.org/10.1007/978-3-7091-3078-0_7.

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Duvernoy, Henri M. "Coronal (frontal) sections — Figs. 128–153." In The Human Brain Stem and Cerebellum. Springer Vienna, 1995. http://dx.doi.org/10.1007/978-3-7091-3078-0_8.

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Youssef, Fady, and Sebastian Kassner. "Kinematic Design." In Springer Series on Touch and Haptic Systems. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-04536-3_8.

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AbstractOne aspect in haptic devices is the design of the kinematics. The kinematics of a mechanism is the key to implement and accomplish the design goals, like transmitting dynamic feedback in the form of forces or torques, or allowing a sufficient workspace for the user to interact with environment. This chapter introduces the steps of the kinematic design. The chapter consists of five main sections. The first section gives an overview on some basic definitions and the main types of mechanisms. In the second section, the first step in the design, defining the structure of the mechanism, is introduced. This is accompanied with an example. After choosing the most applicable structure for the desired application, the second step takes place, where the kinematic equations are solved. These equations are used to describe the relation between the operating point of the mechanism and the base at any point in time. Different approaches are used to solve those equations depending on the type of the mechanism used. The third and final step in the design process is introduced in the fourth section. This step contains the optimization process of the mechanism in order to achieve a desired operation of the mechanism. Last but not least, the importance of modeling and simulation is discussed in the last section.
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"Color Plates Section." In Stem Cells. Elsevier, 1997. http://dx.doi.org/10.1016/b978-0-12-563455-7.50020-9.

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"Color Plate Section." In Stem Cells and Bone Tissue. CRC Press, 2013. http://dx.doi.org/10.1201/b14590-27.

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"Color Plate Section." In Regenerative Medicine, Stem Cells and the Liver. Science Publishers, 2012. http://dx.doi.org/10.1201/b11937-14.

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"Color Plate Section." In Stem Cells: From Basic Research to Therapy, Volume Two. CRC Press, 2014. http://dx.doi.org/10.1201/b16962-20.

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Conference papers on the topic "Stem section"

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Hubbard, William A., and B. C. Regan. "Imaging Nanoscale Electronic Changes in a Biased GaN HEMT." In ISTFA 2024. ASM International, 2024. http://dx.doi.org/10.31399/asm.cp.istfa2024p0317.

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Abstract The transmission electron microscope (TEM) is the standard high-resolution technique for imaging microelectronics. But TEM primarily generates contrast related to the physical structure and composition of samples, giving little insight into their electronic properties. Samples must also be electron transparent, typically requiring cross-sectioning of components to nanometers-thin foils prior to imaging, which can compromise their electronic integrity. These cross section samples are also notoriously difficult to electrically connect to without surface leakage dominating transport. As a result, successful in situ electronic testing or bias-manipulation of electronic devices in the TEM is notably rare. Here we image nanoscale, bias-induced electronic changes in an electrically contacted cross section extracted from a GaN high electronmobility transistor (HEMT). The sample is prepared using a Xe+-based plasma focused ion beam (PFIB) to eliminate conducting implantation of the standard FIB ion, Ga+. Scanning TEM electron beam-induced current (STEM EBIC) imaging visualizes bias-induced changes to the device’s electronic structure during normal biasing, stressing, and after failure, all performed in situ.
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Rajagopal, Anurag, and Dewey Hodges. "Generalized Timoshenko and Vlasov Theories for the Oblique Cross-Sectional Analysis of Rotor Blades." In Vertical Flight Society 70th Annual Forum & Technology Display. The Vertical Flight Society, 2014. http://dx.doi.org/10.4050/f-0070-2014-9495.

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An important aspect of rotor blade structural and aeroelastic analyses is the cross-sectional analysis, i.e., the step that generates the blade section properties and recovers 3D stress, strain and displacement. Although there exist several section tools of repute, they suffer from a shortcoming that the reference section has to be perpendicular to the reference line. Therefore, should a user possess the 3D material and geometric properties of a nonorthogonal or oblique section, a significant effort needs to be undertaken in order to get those of the corresponding orthogonal section. The present work addresses this shortcoming by incorporating an oblique cross-sectional analysis model into both Generalized Timoshenko and Generalized Vlasov models of the well known tool VABS. The obliqueness model of VABS is then used with a geometrically exact nonlinear beam formulation to extract the static and dynamic results for beams of various cross sections, through which thorough verification and validation are undertaken. Excellent agreement is observed with results from 3D finite elements and experiments; a fact which must be emphasized given the user-friendly and cost-effective nature of VABS.
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Firmansyah, Rizky, Dediek Tri Kurniawan, Muhammad Nadhif Priambada Utomo, Ahmad Fawaiq Suwanan, Adelia Shabrina Prameka, and Andro Agil Nur Rakhmad. "Game-Based Rapid Analysis and Discuss (G-BRAND) Learning Model: A Unique and Fun Learning Experience to Public Sector Accounting Courses)." In 2024 9th International STEM Education Conference (iSTEM-Ed). IEEE, 2024. http://dx.doi.org/10.1109/istem-ed62750.2024.10663095.

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Bain, Douglas I., and David L. Christophersen. "Some Common Mechanisms Leading to Failures in Heat Recovery Steam Generators." In CORROSION 2003. NACE International, 2003. https://doi.org/10.5006/c2003-03489.

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Abstract Failures due to flow accelerated corrosion have occurred in the economizers and the low pressure generating sections of a number of HRSG's. Deposit accumulation in the high pressure generating section has presented difficulties in many of the same units. Three case histories are presented illustrating the conditions, which have lead to component failures in some Heat Recovery Steam Generator systems.
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Terdyothin, Alongkot, Tuanjai Archevapanich, Manit Chansuthirangkool, Pondthip Inyoo, Thanavit Anuwongpinit, and Boonchana Purahong. "Multi-sector Collaboration for Students of different levels to Learn Digital Technology Skills using Competency Assessment from Learning to Create pieces with a 3D printers for Young Innovators Case Study: MogroWittayakom School." In 2024 9th International STEM Education Conference (iSTEM-Ed). IEEE, 2024. http://dx.doi.org/10.1109/istem-ed62750.2024.10663179.

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Dunér, Gunnar, Ted Best, Dongrui Yang, and Victoria Gelling. "Issues with Correlation between Accelerated Test Methods and Field Performance." In CONFERENCE 2024. AMPP, 2024. https://doi.org/10.5006/c2024-20975.

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Abstract Lifetime prediction often relies on various accelerated methods with the end goal of accurately predicting time-to-failure and failure modes which may occur during real-world exposure. This presentation will focus on a case study for organic coatings over a coil-type metal substrate. Samples from 2011 were evaluated by multiple corrosion, humidity, flexibility, and adhesion measurements prior to field exposure at two test fences in Florida. An unexpected field failure, general blistering, was observed relatively rapidly after the field exposure commenced. This study focuses on data analysis of the 2011 physical and corrosion tests, field exposure results, and recent electrochemical and microscopic evaluations of unexposed 2011 retain samples. The retain samples were from the same 2011 study, but they were never tested and were maintained wrapped on a shelf in a laboratory. No correlation was observed between the standard 2011 tests and the resulting field performance. However, newer test methods, including Electrochemical Impedance Spectroscopy (EIS) and Scanning Transmission Electron Microscopy (STEM) cross-section analysis with elemental mapping, provided insight into the reason for the field blister failure. The proposed mechanism of failure was inconsistencies in pretreatment deposition which caused inconsistent EIS performance and localized blistering upon field testing.
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Orlosky, Christie. "THE HARNESSED ATOM - MIDDLE SCHOOL STEM CURRICULUM." In Joint 52nd Northeastern Annual Section and 51st North-Central Annual GSA Section Meeting - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017ne-290781.

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Root, Kayla Q., Jamie C. Douglas, and Carrie J. Tirel. "SUPPORTING WOMEN IN STEM: A STUDENT’S PERSPECTIVE." In Joint 52nd Northeastern Annual Section and 51st North-Central Annual GSA Section Meeting - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017ne-291179.

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Bryce, Julia, Christina Ortmeier-Hooper, Christina Ortmeier-Hooper, et al. "STEM PATHWAYS FOR MULTILINGUAL STUDENTS AND ENGLISH LEARNERS THROUGH STEM-LANGUAGE ARTS TEACHING/LEARNING ECOSYSTEMS (SLATE)." In 59th Annual GSA Northeastern Section Meeting - 2024. Geological Society of America, 2024. http://dx.doi.org/10.1130/abs/2024ne-397788.

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Allred, Adrianna M. "FROM THE GROUND UP: WOMEN'S PARTICIPATION IN STEM." In 65th Annual Southeastern GSA Section Meeting. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016se-273631.

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Reports on the topic "Stem section"

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Fouquet, Anne, Edgar Aragón, and Marcia Campos. The Emergence of Successful Export Activities in Mexico: Three Case Studies. Inter-American Development Bank, 2009. http://dx.doi.org/10.18235/0011328.

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This paper consists of three case studies of the emergence of three successful export activities in Mexico: avocado production, the manufacture of catheters, and call center outsourcing. Each case study discusses how companies, associations, and governments at various levels have addressed market failures and facilitated the provision of public goods necessary for each activity. The case studies additionally profile first movers in each activity and describe the positive externalities they provide to imitators, particularly diffusion of export knowledge. Also include in each case study is a counterfactual case of a less successful activity (mangos, stem cell banking, and other types of business process outsourcing, respectively) and a section on policy implications.
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Kessler, Matthew, Annsofie Wahlström, Hanna Weiber-Post, and Ylva Carlqvist Warnborg. Exploring the future of meat : navigating complex topics for better decision making. SLU Future food, Swedish University of Agricultural Sciences, 2023. http://dx.doi.org/10.54612/a.55n5kd18dl.

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This report draws on insights gleaned from putting together the project The future of meat – storytelling and dialogues for improved decision making from 2021-2023, integrating lessons from expert interviews, podcast production, and facilitated workshops. The project was initiated by the SLU Future Food platform at the Swedish University of Agricultural Sciences (SLU), and developed and produced by TABLE, which is a food systems collaboration between the University of Oxford, SLU, and Wageningen University and Research. The aim of the project was to reflect on our own viewpoints and to foster mutual understanding and enhance the clarity of conversations around the role of meat and livestock in our societies and for our planet, rather than to intensify differences or argue over right and wrong. We also wanted to explore how stakeholders reach different conclusions and the implications of inaction. The diverse experts we engaged in the project (see Appendix) each aimed to contribute to a ‘good’, sustainable, and equitable future for food. However, due to differing values, professional and academic trainings, and geographic contexts, visions for the future of meat and livestock vary, and this variation is often intensified by the way information circulates in “echo chambers” across media ecosystems. As these experts articulated their visions, motivations, and pathways toward a sustainable food future, we learned that these varied viewpoints often complement rather than conflict with each other. Addressing multifaceted challenges like nutrition, biodiversity conservation, climate mitigation, animal ethics, and social justice indeed requires a spectrum of solutions. For example, rebalancing animal-sourced foods consumptions – increasing it in low- and middle-income countries and decreasing it in high-income countries – could improve health and environmental outcomes. Thus, the project underscores the necessity of embracing diverse perspectives and engaging in meaningful dialogues, forming the basis of a well-rounded strategy for the future of meat and livestock. Recognizing that meat holds different meanings for different people is crucial in moving towards a more sustainable and healthy food system. Adopting an inclusive approach is key to reducing polarization and enhancing the quality of decision-making in this sector. This report is thus divided into two main sections, each directed towards different target groups who contribute to a sustainable food future in different ways. The first section is intended for those with direct power to influence our food systems, including retailers, policymakers and food and agribusiness leaders. In that section, we offer key takeaways and highlight shared understandings and desires to inform decisions towards a more sustainable food future. The second section caters to educators and facilitators striving to improve the quality of dialogues on complex topics. Facilitating dialogues on complex topics is time and resource-intensive but pivotal for steering society toward a more sustainable, resilient, and just future. As mentioned above, the key findings of the project stem from the contributions of a diverse array of experts including scientists, food producers, CEOs, policymakers, and civil society representatives from across the globe, ensuring that the evidence collected in the project is comprehensive and not restricted to perspectives from any single, like-minded group. However, some large-scale, efficient meat producers, whose insights we sought, opted not to participate. This report does not rely on a systematic or comprehensive review of the existing scientific literature on the topics covered. Instead, it synthesizes contributions from the wide range of thoughtful experts, each known for their long-standing experience in this field, who generously shared their knowledge for this project. Finally, if you choose to apply learnings from our project in your work, we are eager to continue the conversation with you.
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Simpson, William T. Heating times for round and rectangular cross sections of wood in steam. U.S. Department of Agriculture, Forest Service, Forest Products Laboratory, 2001. http://dx.doi.org/10.2737/fpl-gtr-130.

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Johnson, Derek, and Nigel Clark. PR-746-22204-R01 Review of Technologies to Enable In-situ Valve Service to Reduce Methane Emissions. Pipeline Research Council International, Inc. (PRCI), 2024. http://dx.doi.org/10.55274/r0000058.

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Leaking gas industry valve stem seals are recognized as a substantial source of atmospheric methane, which is a greenhouse gas. Newly proposed regulations include methane alongside volatile organic compound emissions, with leak detection and repair requirements. If a leak is identified a first attempt at repair must occur no later than five calendar days after identification, or else be justifiably delayed. The objective of this report is to review valve technology and methods used to address in-situ valve stem leak repair that offers an economical solution with reduced service disruption. A wide variety of valves are employed in natural gas facilities, with valve stems that rotate or translate, and with seals ranging from packings to O-rings. Low emissions valve designs are available, but turnover of legacy valves is slow. Precise causes of failures are not well documented, although stem misalignment, intrusive dirt, and corrosion may exacerbate seal damage. Injection of lubricants and sealants into the valve packing or seal area offers the simplest remedy for leakage control. However, more work is required to identify optimal sealants for each application and to predict durability of the repair using injection. Safety must be assured where seals must be replaced, but there are varying practices in addressing isolation of the seal area from high pressure gas. Where double block (or isolation) and bleed are required, knowledge of the valve main seal design is essential. Blowdown of line sections may be required, but the methane release is of concern. Methods exist to capture or else oxidize the methane. Opinions on the protection offered by backseating of gate valves varies. Improved understanding and practice will require comprehensive record keeping on the history of each valve, permitting analysis and quality improvement using the resulting operations database. This is key to recommendations in a future roadmap that includes study of failure modes and optimized use of sealants. Monitoring success of repairs would be better served by measuring leak rate than concentration. Record keeping and better understanding of failures and success of repair approaches also support decisions on immediate versus deferred repair, use of sealants, and on whether a valve should be replaced or repaired. Hardware and practice innovations are anticipated in response to leak detection and repair requirements.
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Lippold, John. Cracking of Alloy 800 Tubing in Superheated Steam Sections of the Solar One Central Receiver. Office of Scientific and Technical Information (OSTI), 1985. http://dx.doi.org/10.2172/1545832.

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Shendo, Marwin Patrick. Multi-Sector General Permit Annual Industrial Storm Water Training, TA-3-22 Power and Steam Plant (Sector 0). Office of Scientific and Technical Information (OSTI), 2015. http://dx.doi.org/10.2172/1167234.

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Veil, J. A. Impact on the steam electric power industry of deleting Section 316(a) of the Clean Water Act: Capital costs. Office of Scientific and Technical Information (OSTI), 1993. http://dx.doi.org/10.2172/10141530.

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Castillo, Rafael, Matteo Grazzi, and Ezequiel Tacsir. Women in Science and Technology: What Does the Literature Say? Inter-American Development Bank, 2014. http://dx.doi.org/10.18235/0009164.

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Skill gaps are a key constraint to innovation, hindering productivity growth and economic development. In particular, shortages in the supply of trained professionals in disciplines related to Science, Technology, Engineering, and Mathematics (STEM) may weaken the innovation potential of a society. A wide gender gap has persisted over the years at all levels of STEM disciplines throughout the world. Although the participation of women in higher education has increased, they are still underrepresented. Latin America is no exception. The untapped potential of fully trained and credentialed women represents an important lost opportunity not only for women themselves but also for society as a whole. Although there is growing recognition of the importance of the issue in developing countries, Latin America faces a lack of information that prevents researchers from deepening the understanding of this phenomenon and policymakers from designing effective interventions. This note aims to contribute to the academic and policy debate in the region by reviewing the main factors put forward in the literature to explain gender inequalities in recruitment, retention, and promotion in STEM disciplines and by providing evidence of the scope and results of policies directed to obtain a better gender balance in the sector.
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McMeekin, Sharon, and Amy Currie. Digital Asset Register Toolkit. Digital Preservation Coalition, 2024. http://dx.doi.org/10.7207/dartool24-01.

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This Toolkit aims to offer practical guidance on how to build, maintain, and use a Digital Asset Register (DAR). It starts by taking you through what a DAR is, why you may wish to build one, and who this toolkit is aimed at. Subsequent sections detail what makes a good DAR, a step-by-step guide to developing one, an example template, further details about information gathering, and using and updating your DAR.
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Walmsley, Terrie, and Robert McDougall. Using Entropy to Compare IO tables. GTAP Research Memoranda, 2005. http://dx.doi.org/10.21642/gtap.rm09.

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The importance of obtaining quality I-O tables for the GTAP Data Base has prompted the need for a method to compare contributed I-O tables. Comparisons are useful for a number of reasons. a) Time comparisons can be used to show how an economy has changed over time. b) Country comparisons may be used to show differences in cost or use structures between countries. c) Comparisons may also be used to highlight errors in construction procedures or mappings and therefore assist us in improving the quality of the data. In this document we look out how entropy can be used to compare I-O tables. The paper is intended to be a practical guide to users who wish to view, examine and use the results from the entropy methods used in the GTAP data Base I-O checking procedure. Section 1 outlines the entropy method used to compare IO tables. Section 2 provides a step by step guide to users on how to view and interpret the results of the entropy programs and section 3 looks at some examples of the entropy program results.
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