Beyond Good and Evil: Formalizing the Security Guarantees of Compartmentalizing Compilation

Compartmentalization is good security-engineering practice. By breaking a large software system into mutually distrustful components that run with minimal privileges, restricting their interactions to conform to well-defined interfaces, we can limit the damage caused by low-level attacks such as control-flow hijacking. When used to defend against such attacks, compartmentalization is often implemented cooperatively by a compiler and a low-level compartmentalization mechanism. However, the formal guarantees provided by such compartmentalizing compilation have seen surprisingly little investigation. We propose a new security property, secure compartmentalizing compilation (SCC), that formally characterizes the guarantees provided by compartmentalizing compilation and clarifies its attacker model. We reconstruct our property by starting from the well-established notion of fully abstract compilation, then identifying and lifting three important limitations that make standard full abstraction unsuitable for compartmentalization. The connection to full abstraction allows us to prove SCC by adapting established proof techniques; we illustrate this with a compiler from a simple unsafe imperative language with procedures to a compartmentalized abstract machine.Comment: Nit

Vascular regeneration in a basal chordate is due to the presence of immobile, bi-functional cells.

The source of tissue turnover during homeostasis or following injury is usually due to proliferation of a small number of resident, lineage-restricted stem cells that have the ability to amplify and differentiate into mature cell types. We are studying vascular regeneration in a chordate model organism, Botryllus schlosseri, and have previously found that following surgical ablation of the extracorporeal vasculature, new tissue will regenerate in a VEGF-dependent process within 48 hrs. Here we use a novel vascular cell lineage tracing methodology to assess regeneration in parabiosed individuals and demonstrate that the source of regenerated vasculature is due to the proliferation of pre-existing vascular resident cells and not a mobile progenitor. We also show that these cells are bi-potential, and can reversibly adopt two fates, that of the newly forming vessels or the differentiated vascular tissue at the terminus of the vasculature, known as ampullae. In addition, we show that pre-existing vascular resident cells differentially express progenitor and differentiated cell markers including the Botryllus homologs of CD133, VEGFR-2, and Cadherin during the regenerative process

\u27Twas in the Time of Roses

VERSE 1\u27Twas in the time of roses dear,I met you ‘mid June flowers,Your cheeks they blushed just like the roses it did seem,Your eyes were shining bright and clear.My soul it trembled o’er with fearWhen I awoke, awoke as from a dream. CHORUS‘Twas in the time of roses Marjorie,When love in all its glory came to me,Since to me your heart first spoke, spoke to mine and mine awoke,‘Twas in the time of roses, blushing roses Marjorie. VERSE 2The roses they have faded dear,Just like my dream of love,I’ve naught left now but mem’ries and some faded flowers,The zephyrs blow the autumn leaves,While my poor heart it grieves and grieves,But naught can bring me back those happy hours. CHORU

Political power, technology, and total war: Two French views

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/68009/2/10.1177_002200275800200404.pd

I Love The Girl My Father Loved And Mother Is Her Name

https://digitalcommons.library.umaine.edu/mmb-vp/4344/thumbnail.jp

Translating Neurobiological Knowledge into Trauma-Informed Occupational Therapy

There is a growing need for an expanded understanding of the experience of trauma in light of many socio-political and cultural events of the previous years. Occupational therapy literature mentions a growing understanding of neuroscience that is leading to trauma-informed protocol reform, however, consistently concludes with the acknowledgment that more information is needed. The purpose of this project was to advocate for occupation as a significant tool in addressing traumatic stress. This project included a scoping review of non-peer-reviewed and peer-reviewed literature and manuscripts as well as a phenomenological qualitative research study interviewing occupational therapy practitioners who work with individuals who have experienced trauma. Preliminary results revealed four major themes, first, the significance of occupation for individuals who have experienced trauma is currently underrepresented/underexplored. Second, therapists and staff members often make judgments during interventions that reveal an incomplete understanding of how to identify a trauma response. Third, there is a need for a universal approach to all therapeutic interactions that acknowledge the ubiquitousness and pervasiveness of trauma. Finally, the neurobiology of trauma is a central component of occupational engagement. Results reveal that understanding how neurobiological mechanisms are involved in the therapeutic process will inform better trauma-informed practice for occupational therapists.https://soar.usa.edu/otdcapstones-spring2022/1046/thumbnail.jp

Reuben Rag

https://digitalcommons.library.umaine.edu/mmb-vp/6111/thumbnail.jp