Miracle-dz/UniFAR-FTUs huggingface dataset:
The Fresnel Zone Light Field Spectral Imager

This thesis provides a computational model and the first experimental demonstration of a Fresnel zone light field spectral imaging (FZLFSI) system. This type of system couples an axial dispersion binary diffractive optic with light field (plenoptic) camera designs providing a snapshot spectral imaging capability. A computational model of the system was developed based on wave optics methods using Fresnel propagation. It was validated experimentally and provides excellent demonstration of system capabilities. The experimentally demonstrated system was able to synthetically refocus monochromatic images across greater than a 100nm bandwidth. Furthermore, the demonstrated system was modeled to have a full range of approximately 400 to 800nm with close to a 15nm spectral sampling interval. While images of multiple diffraction orders were observed in the measured light fields, they did not degrade the system’s performance. Experimental demonstration also showed the capability to resolve between and process two different spectral signatures from a single snapshot. For future FZLFSI designs, the study noted there is a fundamental design trade-off, where improved spectral and spatial resolution reduces the spectral range of the system.
Characterization and Liberation Study of the Beauvoir Granite for Lithium Mica Recovery

A significant proportion of Europe’s lithium endowment is hosted by unconventional lithium resources such as rare-metal granites (RMG) of which the Beauvoir granite in France is a prime example. In such hard-rock deposits, where lithium is mostly hosted in micas (lepidolite, zinnwaldite), the ability to assess whether lithium can be extracted economically from the ore is essential and requires a comprehensive understanding of mineralogical properties and lithium deportment. Using three exploratory drill cores distributed along the North–South axis, a preliminary geometallurgical assessment of the granite has been conducted based on a combination of techniques including Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES), Atomic Adsorption Spectroscopy (AAS), Electron Probe Microanalysis (EPMA), Scanning Electron Microscope (SEM) coupled with automated mineralogy software, X-Ray Diffraction (XRD), optical microscope and sieving. Lithium distribution appears to be variable, reflecting the evolution of the granite, with higher mica content in the southern area and higher Li grade towards the center of the orebody. The size of micas in the assessed sample does not vary significantly. The grindability and liberation size of micas varies in the different zones investigated, PERC S being the most difficult to grind. There is always more than 50 wt% of the micas that are liberated in the samples when crushed to 1 mm. Indirect estimation of Li content based on EPMA and SEM analysis suggests that the content of lithium inside mica crystals could vary. If this estimation is confirmed by direct Li measurement, it for sure makes the calculations of the Li deportment more challenging.
Evaluation and Morphological Characteristics of some Newly–Introduce Grape Cultivars under Egyptian Environmental Conditions

ABSTRACT The present study was conducted for evaluating the morphological characteristics of newly introduce grape cultivars namely Starlight, Sugrafourteen, Midnight Beauty and Autumn crisp under the environmental Egyptian conditions, during three successive seasons 2019, 2020 & 2021 in private vineyard located at El-Sadat city Monofia governorate. The vines were five years old and planted in sandy loam soil. The results showed that all cultivars had fully opened tip, tip of tendrils was tri-fid except midnight beauty had di-tri fid, tendrils. Flower sexual organs had fully developed stamens and fully developed gynoecium. Mature leaf was very large, shape of blade was pentagonal in starlight and Midnight Beauty but it was circular in Sugrafourteen and Autumn crisp. Depth of the upper lateral sinuses in starlight was deep and in Sugrafourteen was very shallow, while it was very deep in midnight Beauty and shallow in Autumn crisp. The arrangement of lobs of upper sinuses was slightly overlapped in starlight and Autumn crisp cvs. , closed in Sografourteen cv. but strongly overlapped in Miednight Beauty cv. Arrangements of lobes of petioles were wide open in all cultivars except Sugrafourteen cv. was slight overlapped. Petiole shape was club shaped in Sugrafourteen but u-shape in the other cultivars, Type of margin was irregularly dentate and the apical tooth was pointed. All cultivars were seedless. Starlight and Sugrafourteen were "early ripening", Midnight Beauty was" early-medium" ripening but Autumn crisp "late" cultivars. Bunch was big in all cultivars (more than 500g) and dense. Berry was large size in all cultivars with broad ellipsoid shape in Starlight ovoid shape in Sugrafourteen and cylindroid shape in Midnight Beauty and Autumn crisp cvs. Berry skin color was pink in Starlight cv. , red in Sugrafourteen, black in Midnight beauty cv. and yellow green in Autumn crisp. The studied cultivars were characterized by good vegetative growth, yield and fruit quality. It is advised to prune Sugrafourteen cv. to cane pruning system while the other cultivars with spure pruning system.
Mesh Study for a Direct Numerical Simulation of the Transonic Flow at Re_c=500,000 around a NACA 0012 Airfoil

Performing a Direct Numerical Simulation (DNS), a mesh study for the transonic flow around the well known NACA 0012 airfoil at a moderate Reynolds number of Re_c= 5·10^5 is presented. The three-dimensional Navier-Stokes equations for an unsteady, compressible flow are discretized in a generalized curvilinear coordinate system. The spatial derivatives of first-order are approximated by a fifth-order WENO scheme, the second-order derivatives by a sixth-order central scheme and the time derivatives by a fourth-order Runge-Kutta scheme. The focus of the investigation is on the demonstration of the applicability of DNS for simulating an airfoil flow at a moderate Reynolds number. At this Reynolds number, theoretical estimations for the necessary number of mesh points are far away from realizable mesh sizes. In the present study five three-dimensional meshes are compared where the largest mesh consists of one billion mesh points (8192 x 512 x 256). This mesh size is close to the practical limit of recent simulations since the numerical effort, expressed in core-hours, is 16 · 10^6 h. The other meshes are gradually coarsened by a factor of 0.25 resulting in only four million mesh points for the coarsest mesh. The mesh study is performed by the comparison of aerodynamical and turbulent quantities. On the one hand the main flow features are studied, which are mostly determined by large flow scales. On the other hand the turbulent intensities are compared, which are influenced by the smallest scales. In this context, the analysis of the energy-spectrum of the turbulent kinetic energy is a useful tool to evaluate the quality of the turbulent boundary layer. Furthermore, pressure waves are studied for all meshes which are generated at the trailing-edge moving upstream.
Control and stabilization of 2 × 2 hyperbolic systems on graphs

We consider 2× 2 (first order) hyperbolic systems on networks subject to general transmission conditions and to some dissipative boundary conditions on some external vertices. We find sufficient but natural conditions on these transmission conditions that guarantee the exponential decay of the full system on graphs with dissipative conditions at all except one external vertices. This result is obtained with the help of a perturbation argument and an observability estimate for an associated wave type equation. An exact controllability result is also deduced.
A 100 GBd PAM-4 Combiner and Driver in SiGe BiCMOS

In this letter, we present an analog PAM-4 combiner and driver circuit based on a current steering output stage designed in a 130 nm SiGe BiCMOS technology. The circuit features an on-chip active balun with more than 67 GHz bandwidth. The output stage supports an adjustable PAM-4 level spacing. It consumes 315 mW and delivers 2 Vpp,diff in a <inline-formula> <tex-math notation="LaTeX">$100 \Omega $ </tex-math></inline-formula> load. Operation of up to 100 GBd has been verified by measured eye diagrams.
Dominant Z-Eigenpairs of Tensor Kronecker Products Decouple

Tensor Kronecker products, the natural generalization of the matrix Kronecker product, are independently emerging in multiple research communities. Like their matrix counterpart, the tensor generalization gives structure for implicit multiplication and factorization theorems. We present a theorem that decouples the dominant eigenvectors of tensor Kronecker products, which is a rare generalization from matrix theory to tensor eigenvectors. This theorem implies low-rank structure ought to be present in the iterates of tensor power methods on Kronecker products. We investigate low-rank structure in the network alignment algorithm TAME, a power method heuristic. Using the low-rank structure directly or via a new heuristic embedding approach, we produce new algorithms which are faster while improving or maintaining accuracy, and which scale to problems that cannot be realistically handled with existing techniques.
Entrained theta oscillations guide perception of subsequent speech: behavioural evidence from rate normalisation

ABSTRACT This psychoacoustic study provides behavioural evidence that neural entrainment in the theta range (3–9 Hz) causally shapes speech perception. Adopting the “rate normalization” paradigm (presenting compressed carrier sentences followed by uncompressed target words), we show that uniform compression of a speech carrier to syllable rates inside the theta range influences perception of subsequent uncompressed targets, but compression outside theta range does not. However, the influence of carriers – compressed outside theta range – on target perception is salvaged when carriers are “repackaged” to have a packet rate inside theta. This suggests that the brain can only successfully entrain to syllable/packet rates within theta range, with a causal influence on the perception of subsequent speech, in line with recent neuroimaging data. Thus, this study points to a central role for sustained theta entrainment in rate normalisation and contributes to our understanding of the functional role of brain oscillations in speech perception.
Enriching research practices through knowledge about Indigenous research methodologies

Introduction Learning about Indigenous research paradigms and methodologies offers insights and reflexive opportunities for those who seek to improve their research practice. This paper explores how research at the ‘interface’ can enrich scholarly inquiry across the academy. Whilst a single paper cannot do justice to the sophistication and nuance of Indigenous methodologies, as an authorship team of one Indigenous and two non-Indigenous academics, and through our established relationship and subsequent conversations, we present in this paper seven distilled methodological learnings that can enrich standard qualitative research practice. We predominantly explored the work of Indigenous scholars worldwide, and where relevant have drawn on non-Indigenous scholars where there may be ‘interface’ compatibilities. We also build off some of our previous work such as Andrews (2020a, 2020b), Andrews (2021) and Bolton and Andrews (2018). It is very important to clearly state that we are not suggesting readers, particularly non-Indigenous readers, use this paper as a template for Indigenous research, or as a guide for conducting research with Indigenous peoples and communities. Rather, our intention is to share our personal learnings about Indigenous research with a view to bridging methodological understanding to achieve high quality qualitative research. Indigenous researchers have sought to navigate the interface between Indigenous and western research to generate new knowledge that reflects the interests, values and priorities of Indigenous peoples. The last twenty-five years has seen significant effort by Indigenous scholars across the globe to establish an Indigenous academic research agenda and pioneer change in research practices. The interface between Indigenous and western knowledge systems has much to offer research as a basis for the generation of new knowledge (Durie, 2004; Martin, 2008). It is at this interface, or intersection between two knowledges, that we make connections and offer our insights. This paper is divided into four sections: Beginning, Middle, Reflective End and New Beginnings, a framework drawn from our work. Within these four sections are seven key methodological reflections under the sub-headings: Understanding place in research, Positionality, Worldviews in research, Privileging knowledges, Relational accountability, Storytelling as methodology and Circular research processes, and at each sub-heading is our key learnings. This is shown in Figure 1, noting the arrows grow in size as we approach ‘Beginning Again’ as a way of illustrating the enriching of knowledges and practices as the learning process loops iteratively.
Interval of effective time-step size for the numerical computation of nonlinear ordinary differential equations

Abstract The computational uncertainty principle states that the numerical computation of nonlinear ordinary differential equations (ODEs) should use appropriately sized time steps to obtain reliable solutions. However, the interval of effective step size (IES) has not been thoroughly explored theoretically. In this paper, by using a general estimation for the total error of the numerical solutions of ODEs, a method is proposed for determining an approximate IES by translating the functions for truncation and rounding errors. It also illustrates this process with an example. Moreover, the relationship between the IES and its approximation is found, and the relative error of the approximation with respect to the IES is given. In addition, variation in the IES with increasing integration time is studied, which can provide an explanation for the observed numerical results. The findings contribute to computational step-size choice for reliable numerical solutions.
The Role of Radiotherapy in the Management of Vaginal Melanoma: A Literature Review with a Focus on the Potential Synergistic Role of Immunotherapy

Among the mucosal melanomas, vaginal melanomas are very rare tumors, accounting for less than 20% of melanomas arising from the female genital tract. They occur most frequently in women in post-menopausal age, but younger patients may also experience this neoplasm, mainly located in the lower third of the vagina or the anterior wall. The optimal management of this tumor remains controversial, with surgery reported as the most frequently adopted approach. However, a clear benefit of surgical treatment in terms of survival has not yet been demonstrated. Conversely, radiotherapy may represent an attractive non-invasive alternative, and there are several favorable reports of the role of radiation therapy, either delivered with photons, brachytherapy, or hadrontherapy. A wide range of techniques and fractionation regimens are reported with substantially good tolerance to the treatment, and acute G3 or higher toxicities are reported only in the case of concurrent immunotherapy. Of note, due to the rarity of the disease, there is a lack of high-level evidence for the optimal therapeutic option. In this scenario, recent studies theorize the possibility of developing combinatorial approaches of radiotherapy with immunotherapy based on cutaneous melanomas reports. In this review, we aim to summarize the evidence available in the literature supporting the role of definitive radiotherapy for vaginal melanomas, with a focus on the combination of RT with immunotherapy, in terms of optimal timing and biological rationale.
Effect of Jacobson’s Relaxation Technique on Anxiety and Sleep Quality in Burn Patients

Background : Burn victims frequently experience significant levels of anxiety and poor sleep due to their distinctive physical and psychological situations. Aim : The present study aimed to evaluate the effectiveness of Jacobson’s relaxation technique on anxiety and sleep quality in burn patients. Design : A quasi-experimental design was used in the present study. Settings : The study was conducted at the Plastic, Reconstructive, and Burn Surgery Center, Mansoura University, Egypt. Subjects : The study comprised a purposive sample of 30 adult burn patients. Tools of data collection : Data were collected using tool I: A structured interview questionnaire; tool II: The State-Trait Anxiety Inventory (STAI) and tool III: The Pittsburgh Sleep Quality Index (PSQI). Results : There was a statistical significance difference among total anxiety levels pre and post-intervention at P value ≤ 0.05, there was a highly statistically significant difference between total sleep score pre and post-intervention and there was a highly statistically significant effect of anxiety degree on sleep quality among burned patients pre and post applying intervention at p value ≤ 0.001. Conclusion : Jacobson’s relaxation technique was very effective in reducing anxiety and improving sleep quality in burn patients post-implementation of the technique. Recommendation : Jacobson's Relaxation Technique can be used as a complementary adjunct therapy in conjunction with other medical therapies to lessen the severity of these patients' anxiety levels and sleep disorders.
Exploration of Bistable Oscillatory Dynamics in a Memristor from Forschungszentrum Jülich

Very recently, a deep numerical investigation of resistance switching phenomena in a TaOxReRAM cell from Forschungszentrum Jülich, based on a predictive physics-based model, uncovered the capability of the nano-device to exhibit one of two possible steady-state oscillatory behaviours, depending upon the initial condition, under specific AC periodic triangular wave stimuli. In these circumstances, however, one of the two oscillations in the device memory state, was found to hit cyclically the lower bound in the existence domain of the model solution. Out of a thorough numerical exploration of the model, guided by system-theoretic considerations based upon the Time Average State Dynamic Route tool, this paper shows that it is indeed possible to shape the parameters of an AC periodic pulse train excitation signal so that each of the two locally-stable oscillatory response solutions for the memory state of the ReRAM cell lie well within the range of admissible values.
Climate Change and Its Impacts on the Development of Coastal Communities in Nigeria

Climate change poses a greatest challenge to community development such as flooding, dew, humidity, haze and cloud, to mention a few. Climate change is a global challenges affecting every segment of the society. It appears people in the rural areas are better off because the live closer to nature. The study made use of sample size of 64 people living at Eti-Osa Local government Lagos State. The data collected from the questionnaire and interview were coded using Non parametric technique of Z-score analysis. The finding reveals that climate change threaten the livelihood of people in coastal communities and serve as setback progress to human development with negative implications for political and socio-economic arrangement. The study recommends among others that Federal government should adequately equip and empower local government to tackle any disaster with dispatch efficiency arising from climate change. The study concludes that the drive to develop coastal community programmes that are sustainable in the context of climate change policy is implemented at all levels of government.
Baseline Factors Associated with Pain Intensity, Pain Catastrophizing, and Pain Interference in Intensive Interdisciplinary Pain Treatment for Youth

Background: More could be known about baseline factors related to desirable Intensive Interdisciplinary Pain Treatment (IIPT) outcomes. This study examined how baseline characteristics (age, gender, child pain catastrophizing (PCS-C), pain interference, pain intensity, anxiety, depression, paediatric health-related quality of life (PedsQLTM), and parent catastrophizing (PCS-P)) were associated with discharge and 3-month follow-up scores of PCS-C, pain intensity, and pain interference. Methods: PCS-C, pain intensity, and pain interference T-scores were acquired in 45 IIPT patients aged 12–18 at intake (baseline), discharge, and 3-month follow-up. Using available and imputed data, linear mixed models were developed to explore associations between PCS-C, pain intensity, and pain interference aggregated scores at discharge and follow-up with baseline demographics and a priori selected baseline measures of pain, depression, anxiety, and PCS-C/P. Results: PCS-C and pain interference scores decreased over time compared to baseline. Pain intensity did not change significantly. Baseline PCS-C, pain interference, anxiety, depression, and PedsQLTM were associated with discharge/follow-up PCS-C (available and imputed data) and pain interference scores (available data). Only baseline pain intensity was significantly associated with itself at discharge/follow-up. Conclusions: Participants who completed the IIPT program presented with reduced PCS-C and pain interference over time. Interventions that target pre-treatment anxiety and depression may optimize IIPT outcomes.
A Vertical Phototransistor of Perovskite/Polymer Nano Heterojunction for Minimizing Ionic Defects

We report a vertical phototransistor based on nano heterojunction of perovskite nanocrystal and polymer semiconductor. The perovskite nanocrystals are of low-defect feature and the polymer spacing adjacent perovskite crystal helps the collection of photogenerated carriers. Compared with the pristine-film heterojunction method, our nano-heterojunction method reduces the dark current from <inline-formula> <tex-math notation="LaTeX">${1}. {2}\times {10} ^{-{5}}$ </tex-math></inline-formula> A/cm2 to <inline-formula> <tex-math notation="LaTeX">${5}. {8}\times {10} ^{-{8}}$ </tex-math></inline-formula> A/cm2, improves the detectivity from <inline-formula> <tex-math notation="LaTeX">${5}. {2}\times {10} ^{{10}}$ </tex-math></inline-formula> jones to <inline-formula> <tex-math notation="LaTeX">${2}. {6}\times {10} ^{{12}}$ </tex-math></inline-formula> jones, and reduces the photocurrent decay by 95%. This also provides useful insights for pursuing high-performance and operational stable perovskite vertical phototransistors.