Dielectric resonator antennas for wireless powering of sensors embedded in civil structures

Wireless power transmission (WPT) is currently being used in a number of applications, including monitoring the health of concrete infrastructure such as bridges, buildings, tunnels, and dams, where antennas of different types, geometries and sizes have been designed for powering sensors that are embedded in concrete structures. However, dielectric resonator antennas (DRAs), which have shown great potential in free-space for microwave WPT applications, have not been investigated in concrete. In this thesis, different DRAs are designed and their performance in the X-band frequency range for the WPT in concrete is investigated using an electromagnetic computational tool: CST Microwave Studio (MWS). In addition, selected DRAs are manufactured and measurement results are compared to simulation results. Furthermore, CST MWS is utilised to design and investigate surface-mountable electromagnetic sensors that can be used for concrete characterisation, crack location and crack width estimation. Firstly, rectangular DRAs of different lengths operating in the X-band are designed, and a two-antenna setup with an external transmitting antenna and an embedded receiving antenna is used to investigate WPT to embedded sensors in concrete. It is found that, the designed DRAs can be used for WPT to the embedded sensors in concrete. However, it is also found that some of the electromagnetic energy from the external transmitting antenna radiates away from the embedded antenna. Short and long DRAs are fabricated and measured in free-space and a good agreement with simulation results is observed. The short DRA has better WPT performance than long DRA over the entire X-band. To achieve a reliable WPT system, the sensitivity of the WPT to variations in the electrical (loss tangent tan δ and the relative dielectric constant) of concrete is investigated. It is found that WPT ii using the long and short DRAs appear to be more sensitive to the electrical properties of concrete at frequencies that are closer to the lower and upper frequency limits, respectively. Secondly, gratings techniques are used to redirect the radiated electromagnetic energy from the transmitting antenna towards the receiving antenna. For this purpose, rectangular-, hexagon-, and octagon-shaped DRAs with metal loaded dielectric gratings are designed, investigated, and optimised to maximise microwave WPT to embedded sensors in concrete. These antennas are suitable for wireless powering of multiple sensors, which is illustrated by changing the positioning of the embedded/receiving antenna with respect to the transmitting antenna. Furthermore, the sensitivity of WPT using these antennas to variations in the electrical properties of concrete is investigated and the simulation results are recorded. The obtained results show that reliable WPT can be obtained with the octagon-shaped DRA because it is less sensitive to variations in the electrical properties of concrete. Finally, surface-mountable electromagnetic sensors using dual-port rectangular DRA, hexagon-, and octagon-shaped planar DRAs are designed and investigated for characterisation of concrete and crack detection. It is found that the surface-mountable electromagnetic sensor using the rectangular DRA has the highest sensitivity to variations of the electrical properties of concrete and can be used to approximate the loss tangent and the relative dielectric constant of concrete, whereas hexagon-shaped planar DRA is highly sensitive to the crack width at different locations, and can be used to estimate crack width and position remotely

Tracing the Impact of Migration in Bangladesh: From Partition to the Pandemic

The challenge of migration has been multidimensional, with ramifications that range from economic, social, cultural, and even psychological. People have suffered deep trauma, which is reflected through their experiences of homelessness, the act of leaving their homeland or known habitat behind and being forced to travel due to societal pressure. This paper attempts to study migration-based literature and films with a special focus on two films from Bangladesh, Chitra Nodir Pare (Quite flows the River Chitra) and Maati (Back to its Roots). The first part of the paper examines how partition affected the subcontinent and caused trauma to multiple people in different ways by creating divisions and further turning friends into strangers. It also attempts to analyse the economic as well as identity crisis brought about by the large inflow of migrants. Migration caused by either war or disease causes multiple problems in our society such as panic, chaos, homelessness or violence. The second part of the paper studies the societal impact of migration on the gender scale with a focus on inter-communal relationships. Through Sudipto Roy’s Tasher Ghawr, made during the pandemic, the paper examines the problems of women’s abuse at home during the lockdown. Furthermore, the third and concluding part of the paper attempts to analyse migration from the prism of the Partition to the Pandemic

Unmet Medical Home Needs and Educational Services Access in Children with Autism Spectrum Disorder

One in 54 children is diagnosed with an autism spectrum disorder (ASD) in the U.S. The American Academy of Pediatrics (AAP) is a primary care model defined as accessible, continuous, comprehensive, family-centered, coordinated, compassionate, and culturally-effective care for children with ASD, jointly with educational services. Children with ASD use educational services for cognitive, social, and behavioral needs. Educational services include early intervention (EI) through EI plans or school services under special education plans in public schools. Linking health and educational services reduces fragmented care and collaboratively addresses the needs of children with ASD. Although the AAP has asserted efforts to coordinate health and educational services, whether medical home care contributes to educational services use remains unclear. Using the 2016/2017 National Survey of Children’s Health (NSCH), this study measured the association between care that did not meet AAP medical home criteria and educational services use for children aged 1-17 with ASD. Medical home care was operationalized as care that did not meet AAP medical home criteria. Multivariate analyses were performed for two sets of predictive models, with educational services as outcomes: ever had special education or EI plans (n=1,428) and not currently using services under these plans (n=1,248), while controlling for predisposing, enabling, enabling-vulnerability, and need factors in the Andersen behavioral model of health services use with a vulnerability domain. Approximately 68% of children with ASD ever had special education or EI plans, and 10% were not currently using services under these plans, for those without care that met AAP medical home criteria. Medical home care was not significantly associated with ever having special education or EI plans but associated with less likelihood of current service use under these plans (aOR = 0.51, 95% CI [0.29-0.90]). Significant predictors of ever having special education or EI plans were children’s ages, three or more children in households, Black or Other races, decreased maternal health status, single parent families, having public insurance, and age at ASD diagnoses. Children’s ages (aOR = 1.09, 95% CI [1.00-1.18]), maternal health (aOR = 1.88, 95% CI [1.05-3.36]), and children with special healthcare needs status (aOR = 2.58, 95% CI [1.17-5.68]) were associated with greater odds of not currently receiving services under one of these plans. For children with ASD, care that did not meet AAP medical home criteria was not significantly associated with ever having a special education or EI but was significantly associated with not currently receiving services under one of these plans. This study highlights the gaps in access to medical home care that affects educational services access which are another source of crucial services for children with ASD. Policies and practices improving integrated care systems are needed to increase access to medical home care for children with ASD and to provide a gateway to educational services through coordinated care with medical homes

Portofolio Kontrak Kerja PT Cakrawala Muda Mandiri

Mangsa. Moh. Sabrin, 2023. (CMM Translation). Counsellor: Dr. Muhammad Fadli Ramadan, S.P.D., M.P.D. The COE Internship Programmeme Arabic Translator, counselled by Muhammadiyah Malang University Arabic Education Studies Programmeme, aims to give the students the opportunity to apply the knowledge learned during the course in a more real world of work. This research covers the job offers received by the author. The company sees and evaluates that the performance of the author for the client is excellent, therefore the author gets the opportunity to work as a technician. The two-month internship programme is scheduled for October 2 and December 2, 2023. Working days at the Youth Independent Horizon are from Monday to Friday. The internship model applied at PT Cakrawala Muda Indiri is full-time. In carrying out his duties as an internship student, the CMM party divided it into two sections: administration and technicians, so the writer gained work experience during the internships taking place in the technician section. In this section, the author is tasked with preparing the device for the interpreter. Therefore, the writer really had good work experience

Immunomodulation of myeloid-derived suppressor cells by particulate b-glucan in cancer.

Myeloid-derived suppressor cells (MDSC) are a heterogeneous population of immature myeloid cells that promote tumor progression. In this study, we investigated the effect of dectin-1 stimulation by yeast-derived particulate β-glucan in MDSC function and differentiation in cancer. In vivo treatment of mice bearing lewis lung carcinoma and mammary cell carcinoma with particulate β-glucan decreased tumor weight and splenomegaly, and reduced the accumulation of polymorphonuclear-MDSC (PMN-MDSC) but not monocytic-MDSC (M-MDSC) in the spleen and tumor. In addition, particulate β-glucan differentially modulated the function of different MDSC subsets; it enhanced PMN-MDSC respiratory burst and apoptosis, and induced the differentiation of M-MDSC into F4/80+CD11c+antigen-presenting cells in a dectin-1 dependent manner. ERK1/2 phosphorylation was also required for the acquisition of APC properties in M-MDSC. Moreover, M-MSDC treated with particulate β-glucan did not promote tumor growth in vivo when inoculated with LLC subcutaneously. To evaluate the effect of particulate β-glucan treatment in humans, patients with non-small cell lung cancer (NSCL) were treated with particulate β-glucan for two weeks prior to any other treatment and surgical excision of the tumor. Strikingly, the frequency of CD14-HLA-DR-CD11b+CD33+ MDSC decreased in the peripheral blood, and arginase-1 expression significantly decreased in a cohort of 15 patients. This study was the first to assess the effect of particulate β-glucan on MDSC in lung cancer patients, towards a future inclusion of particulate β-glucan in combination therapies in lung cancer

HUBUNGAN DAYA TAHAN KEKUATAN OTOT LENGAN DAN KOORDINASI MATA TANGAN DENGAN KEMAMPUAN PASSING ATAS BOLAVOLI

Tujuan penelitian ini adalah untuk mengetahui hubungan antara daya tahan kekuatan otot lengan dan koordinasi mata tangan dengan kemampuan passing atas permainan bola voli. Populasi dalam penelitian ini berjumlah 107 orang, dan teknik penarikan sampel adalah dengan purposive sampling berdasarkan pertimbangan variabel kendali dan mampu melakukan passing atas bolavoli diperoleh 30 orang. Sedangkan instrument yang digunakan adalah dengan cara tes push-up diambil berdasarkan kemampuan mahasiswa, koordinasi mata tangan dengan cara tes lempar tangkap bola, kemudian untuk mengukur kemampuan passing atas permainan bolavoli dengan cara tes passing atas. Hasil penelitian menunjukkan bahwa daya tahan kekuatan  otot  lengan mempunyai hubungan dengan  kemampuan  passing atas permainan bolavoli dimana rx1y  = 0,52 > r table  pada taraf signifikan α 0,05, koordinasi mata tangan mempunyai hubungan dengan kemampuan passing atas permainan bola voli rx2y = 0,49 > r tabel pada taraf signifikan α 0,05 sedangkan hasil uji korelasi ganda diperoleh nilai rx1.2y  = 0, 60 > r tabel pada taraf signifikan α 0,05 dengan koefisien  determinasi =  0,36  atau 36%. Penelitian ini dapat disimpulkan bahwa terdapat hubungan yang signifikan antara daya tahan kekuatan otot lengan dan koordinasi mata tangan dengan kemampuan passing atas permainan bolavoli