Improving XMHF’s Compatibility with Commodity Operating Systems and Hardware

Micro-hypervisors are used in many research projects to improve the security of computer systems. For example, some micro-hypervisors can separate securitysensitive programs from commodity operating systems, which typically consist of millions of lines of code. Thus, the security-sensitive programs are secure even if the operating systems are compromised. XMHF is a micro-hypervisor framework for the x86 micro-architecture that allows developers to extend it into customized micro-hypervisors. Unfortunately, XMHF does not support the latest commodity operating systems and hardware.  This thesis presents an enhancement of XMHF, called XMHF+, which addresses the compatibility issues mentioned above and introduces new features. XMHF+ extends its support to 64-bit modern operating systems such as Windows 10 and Debian 11, as well as modern chipsets with TPM 2.0. Moreover, XMHF+ virtualizes the hardware virtualization extension, enabling popular hypervisors such as KVM, VMware, VirtualBox, and Hyper-V to run on top of it. XMHF+ maintains the design principles of XMHF, making it possible to verify its memory integrity as future work. </p

Li₅AlO₄‑Assisted Low-Temperature Sintering of Dense Li₇La₃Zr₂O₁₂ Solid Electrolyte with High Critical Current Density

In recent years, solid electrolytes (SEs) have been developed a lot due to the superior safety of solid-state batteries (SSBs) upon liquid electrolyte-based commercial batteries. Among them, garnet-type Li7La3Zr2O12 (LLZO) is one of the few SEs that is stable to lithium anode with high Li+ conductivity and the feasibility of preparation under ambient air, which makes it a promising candidate for fabricating SSBs. However, high sintering temperature (>1200 °C) prevents its large-scale production, further hindering its application. In this work, the Li5AlO4 sintering aid is proposed to decrease the sintering temperature and modify the grain boundaries of LLZO ceramics. Li5AlO4 generates in situ Li2O atmosphere and molten Li–Al–O compounds at relatively low temperatures to facilitate the gas–liquid–solid material transportation among raw LLZO grains, which decreases the densification temperature over 150 °C and strengthens the grain boundaries against lithium dendrites. As an example, Ta-doped LLZO ceramics without excessive Li sintered with 2 wt % Li5AlO4 at 1050 °C delivered high relative density > 94%, an ionic conductivity of 6.7 × 10–4 S cm–1, and an excellent critical current density (CCD) of 1.5 mA cm–2 at room temperature. In comparison, Ta-doped LLZO with 15% excessive Li sintered at 1200 °C delivered low relative density < 89%, a low ionic conductivity of ∼2 × 10–4 S cm–1, and a poor CCD of 0.5 mA cm–2. Li symmetric cells and Li-LFP full cells fabricated with Li5AlO4-assised ceramics were stably cycled at 0.2 mA cm–2 over 2000 h and at 0.8C over 100 cycles, respectively

Degradation of Cationic Red GTL by Catalytic Wet Air Oxidation over Mo–Zn–Al–O Catalyst under Room Temperature and Atmospheric pressure

To overcome the drawback of catalytic wet air oxidation (CWAO) with high temperature and high pressure, the catalytic activity of Mo–Zn–Al–O catalyst for degradation of cationic red GTL under room temperature and atmospheric pressure was investigated. Mo–Zn–Al–O catalyst was prepared by coprecipitation and impregnation. XRD, TG-DTG, and XPS were used to characterize the resulting sample. Central composition design using response surface methodology was employed to optimize correlation of factors on the decolorization of cationic red GTL. The results show that the optimal conditions of pH value, initial concentration of dye and catalyst dosage were found to be 4.0, 85 mg/L and 2.72 g/L, respectively, for maximum decolorization of 80.1% and TOC removal of 50.9%. Furthermore, the reaction on the Mo–Zn–Al–O catalyst and degradation mechanism of cationic red GTL was studied by Electron spin resonance (ESR) and GC-MS technique. The possible reaction mechanism was that the Mo–Zn–Al–O catalyst can efficiently react with adsorbed oxygen/H₂O to produce ·OH and ¹O₂ and finally induce the degradation of cationic red GTL. GC-MS analysis of the degradation products indicates that cationic red GTL was initiated by the cleavage of NN and the intermediates were further oxidized by ·OH or ¹O₂

A 56-year-old female patient with non-diffuse PTL.

<p>The transverse sonogram shows the increased chaotic vascularity (arrows). (Tr: Trachea)</p

A 50-year-old female patient with diffuse PTL.

<p>Transverse sonogram shows the enlarged thyroid with decreased heterogeneous internal echoes (arrows).</p

A 55-year-old male patient with diffuse PTL.

<p>The transverse sonogram shows the presence of macrocalcification (arrows).</p

A 67-year-old male patient with non-diffuse PTL.

<p>(A)The longitudinal sonogram shows that PTL was limited to the right thyroid lobe (arrows). (B) The longitudinal sonogram shows a heterogeneous echotexture of the left thyroid lobe (arrows).</p

A 78-year-old female patient with non-diffuse PTL.

<p>The transverse sonogram shows the extremely hypoechoic lesions (arrows) with posterior acoustic enhancement (arrow heads).</p

A 78-year-old female patient with non-diffuse PTL.

<p>The transverse sonogram shows the presence of a hyperechoic portion (short arrows) and microcalcification (long arrow) within an extremely hypoechoic PTL lesion.</p

A 65-year-old female patient with non-diffuse PTL.

<p>The longitudinal sonogram shows the honeycomb appearance in a PTL lesion (arrows). (M: mass)</p