Magnon Condensation in a Dense Nitrogen-Vacancy Spin Ensemble

The feasibility of creating a Bose-Einstein condensate of magnons using a dense ensemble of nitrogen-vacancy spin defects in diamond is investigated. Through assessing a density-dependent spin exchange interaction strength and the magnetic phase transition temperature ($T_c$) using the Sherrington-Kirkpatrick model, the minimum temperature-dependent concentration for magnetic self-ordering is estimated. For a randomly dispersed spin ensemble, the calculated average exchange constant exceeds the average dipole interaction strengths for concentrations approximately greater than 70 ppm, while $T_c$ is estimated to exceed 10 mK beyond 90 ppm, reaching 300 K at a concentration of approximately 450 ppm. On this basis, the existence of dipole-exchange spin waves and their plane-wave dispersion is postulated and estimated using a semiclassical magnetostatic description. This is discussed along with a $T_c$-based estimate of the four-magnon scattering rate, which indicates magnons and their condensation may be detectable in thin films for concentrations greater than 90 ppm.Comment: 14 pages, 6 figure

Application of Digital Image Segmentation of Plantation Fruit Classification in Samarinda Agricultural Polytechnic

Applications of Digital Image Segmentation of Plantation Fruit Classification in Samarinda State Agricultural Polytechnic Based on Form The development of computer technology at this time has brought significant progress in various aspects of human life. Such development is supported by the availability of increasingly high hardware and software, one of the technologies experiencing rapid development is image processing. Image processing is a system where the process is carried out by entering an image and the result is also an image. Currently the use of digital images is widely used in various fields one of which is in the plantation sector. Therefore, the purpose of this study is to create a digital image segmentation application for the classification of plantation fruit based on shape. The method used for image segmentation is the Thresholding method, while the image classification uses the Artificial Neural Network (ANN) method. The accuracy generated by the system both in the training process and testing shows that the method used can classify fruit images wel

Alien Registration- Curtis, Ella R. (Blaine, Aroostook County)

https://digitalmaine.com/alien_docs/22635/thumbnail.jp

Alien Registration- Currie, Ella R. (Mars Hill, Aroostook County)

https://digitalmaine.com/alien_docs/34159/thumbnail.jp

Re-establishment of pollen-mediated connectivity is key to successful restoration of fragmented populations of Eucalyptus albens

An essential factor in assessing the success of woodland restorations is understanding whether gene flow and connectivity between restored and remnant populations has been re-established. Without pollinator services, isolated populations can further subdivide and face concerns of inbreeding depression, which is not the target of restoration projects. Within the ‘Central Valley’ of the Warrumbungle National Park, a series of restoration plantings were performed between the 1980s and 1990s to restore the previously abundant Box-Gum Grassy Woodlands, in particular White Box Gum trees (Eucalyptus albens). Extensive land clearing meant that these populations became extremely fragmented within the agricultural matrix, with only a few remaining extant remnant trees. This restoration was discovered to use locally sourced genetic material for plantations within the park, which is known to cause issues with inbreeding depression and lower genetic variability. Extending upon previous studies, I analysed relictual (historic scattered trees), natural (leftover extant populations), planted (restored trees) and sapling/seedling populations (juveniles grown in situ and ex situ) of E. albens trees for the genetic diversity and population structure by extracting genomic DNA and genotyping of SNP presence and absence conducted using DArTseq microarray developed for Eucalypt species. For the first time for this species, a high-confidence paternity analysis of seedlings and a parent pair analysis of saplings were conducted from a range of populations and were used to quantify pollen-mediated gene flow respectively to analyse connectivity between populations. By combining all analyses, I assessed the genetic success of this mature restoration project, with a focus on determining whether planted populations of E. albens displayed comparable genetic diversity levels and population structure to those of their remnant cohorts and whether there was evidence of gene flow between these groups. Analysis of genetic diversity and differentiation in dartR yielded no significant difference in genetic diversity between all groups, and most populations were relatively homogenous (especially natural stands) in structure, except for two planted populations, that were sourced externally from the valley. Seedlings planted in situ had lower inbreeding levels, suggesting that there was further outcrossing between stands between generations. Parentage analysis revealed that planted and natural populations were outcrossing, suggesting successful gene flow and genetic compatibility. Overall, there was little negative effect of local provenance sourcing, and the restoration was actively producing many viable saplings ameliorating inbreeding issues

Knowledge Practice and Outcome of Quality Nursing Care Among Nurses in University of Calabar Teaching Hospital (UCTH)

Objectives: The main purpose of this study was to determine knowledge practice and outcome of quality nursing care among nurses in University of Calabar Teaching Hospital (UCTH). Three research questions and one hypothesis were formulated to guide this study. Literature related to the variables under study was reviewed according to the research questions and hypothesis formulated to guide the study. Survey research design was adopted for the study. Methods: The design involves the collection of data to accurately and objectively describe existing phenomena, and to make inferences about the population. A total sample of one hundred and forty (140) respondents was randomly selected for the study. The selection was done through the simple random sampling technique. This was to give each and every members of the population equal and independent opportunity of being selected for the study. The main instrument used for the collection of data, was the questionnaire. It was administered personally by the researchers with the help of two research assistants. To answer the research questions and test the hypotheses, frequencies, percentages, and contingency chi square analysis were considered the most appropriate statistical techniques because of the nature of the variables involved in the research questions and the formulated hypothesis directing the study. The hypothesis was subjected to testing at .05 level of significance with critical values and degree of freedom and the following results were obtained; Nurses at the University of Calabar teaching hospital have knowledge associated with the quality of nursing care rendered to patients at the hospital, Nurses at the University of Calabar teaching hospital Practiced quality nursing care. Nurses at the University of Calabar teaching hospital Rendered Quality nursing care which was reflected in the positive responses by patients in the hospital. There was a significant influence of knowledge on the practice of quality nursing care among nurses in University of Calabar Teaching Hospital. Conclusion: it was concluded among others that the hospital management should always remind nurses of their obligations to patients through continuing education this will help nurses to improve on quality nursing care to patients

DEVELOPMENT OF IM YUNIC FOR SVA LEARNING DEVICE FOR GRAMMATICAL PROFICIENCY

The study developed the IM YUnIC for SVA in response to a desire to offer an interactive, modern-inspired traditional learning device for teaching subject and verb agreement (SVA) among Grade 7 students. Adopting the descriptive research design, data were obtained from the interview with the cooperating teacher, the classroom observation using the device in two randomly chosen Grade 7 sections composed of 76 students of Nicolas L. Galvez Memorial National High School (NLGNHS) in Bay, Laguna, the test, and the survey. Data were analyzed using both qualitative and quantitative methods. Findings revealed that, based on the teacher’s assessment and periodical test, the students’ level of grammatical proficiency was “developing” with grammar being taught implicitly using teacher-made materials. With its interactive features to enhance knowledge on subject and verb agreement, IM YUnIC for SVA was developed and presented to teachers and students. It earned positive feedback in terms of its appearance, impact, utility, and content. A ten-item test was then administered, and results showed that students mean scores were 5.51 and 5.05, suggesting that students need more practice. Hence, IM YUnIC for SVA may not easily develop students’ grammatical proficiency, but it can offer potential benefits.&nbsp

Unmanned Aircraft System Navigation in the Urban Environment: A Systems Analysis

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/140665/1/1.I010280.pd