16,858 research outputs found

    Process of casting heavy slips Patent

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    Freeze casting of metal ceramic and refractory compound powders into plastic slip

    The dispersion and dissipation of waves in blood vessels

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    Dispersion and dissipation of waves in blood vessel

    Theory of the Jamming Transition at Finite Temperature

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    A theory for the microscopic structure and the vibrational properties of soft sphere glass at finite temperature is presented. With an effective potential, derived here, the phase diagram and vibrational properties are worked out around the Maxwell critical point at zero temperature TT and pressure pp. Variational arguments and effective medium theory identically predict a non-trivial temperature scale T∗∼p(2−a)/(1−a)T^*\sim p^{(2-a)/(1-a)} with a≈0.17a \approx 0.17 such that low-energy vibrational properties are hard-sphere like for T≳T∗T \gtrsim T^*, and zero-temperature soft-sphere like otherwise. However, due to crossovers in the equation of state relating TT, pp, and the packing fraction ϕ\phi, these two regimes lead to four regions where scaling behaviors differ when expressed in terms of TT and ϕ\phi. Scaling predictions are presented for the mean-squared displacement, characteristic frequency, shear modulus, and characteristic elastic length in all regions of the phase diagram.Comment: 8 pages + 3 pages S

    Locally Advanced Spiroadenocarcinoma in the Regional Axilla of a Breast Cancer Patient: Hallmarks of Definitive Diagnosis and Management.

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    Eccrine spiroadenocarcinoma is an extremely rare malignant eccrine gland tumor which may masquerade as other more common malignancies such as poorly differentiated squamous carcinoma or metastatic breast cancer. We report a case of an ulcerated axillary skin lesion with bulky adenopathy in a 77 year-old female with a prior history of ipsilateral triple negative breast carcinoma. The clear transition of benign spiradenoma to malignant carcinoma was essential to establishing a definitive diagnosis and treatment plan

    Mental health and emotional well-being of students in further education - a scoping study

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    This study aimed to explore how FE colleges in England are engaging with and addressing the mental health needs of their young students (aged 16-19), both in terms of promoting positive mental health and emotional well-being and in responding to identified mental health problems

    Theodor Billroth and his musical life.

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    Although most widely recognized for the two types of gastric reconstructions that bear his name, Christian Albert Theodor Billroth was one of the most innovative surgeons of his time. His contributions included developing techniques for procedures on the larynx, breast, and esophagus. He pioneered sterility and antisepsis in operating rooms. He also improved surgical education by advocating for longer apprenticeships, which helped create a framework for today’s residency programs. However, what often goes unnoticed was Dr. Billroth’s love for music, a passion that fueled him throughout his life

    A hierarchical Bayesian model for predicting ecological interactions using scaled evolutionary relationships

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    Identifying undocumented or potential future interactions among species is a challenge facing modern ecologists. Recent link prediction methods rely on trait data, however large species interaction databases are typically sparse and covariates are limited to only a fraction of species. On the other hand, evolutionary relationships, encoded as phylogenetic trees, can act as proxies for underlying traits and historical patterns of parasite sharing among hosts. We show that using a network-based conditional model, phylogenetic information provides strong predictive power in a recently published global database of host-parasite interactions. By scaling the phylogeny using an evolutionary model, our method allows for biological interpretation often missing from latent variable models. To further improve on the phylogeny-only model, we combine a hierarchical Bayesian latent score framework for bipartite graphs that accounts for the number of interactions per species with the host dependence informed by phylogeny. Combining the two information sources yields significant improvement in predictive accuracy over each of the submodels alone. As many interaction networks are constructed from presence-only data, we extend the model by integrating a correction mechanism for missing interactions, which proves valuable in reducing uncertainty in unobserved interactions.Comment: To appear in the Annals of Applied Statistic

    Floppy modes and non-affine deformations in random fiber networks

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    We study the elasticity of random fiber networks. Starting from a microscopic picture of the non-affine deformation fields we calculate the macroscopic elastic moduli both in a scaling theory and a self-consistent effective medium theory. By relating non-affinity to the low-energy excitations of the network (``floppy-modes'') we achieve a detailed characterization of the non-affine deformations present in fibrous networks.Comment: 4 pages, 2 figures, new figure
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