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In this paper, a compact 4×4 multiple-input-multiple-output (MIMO) patch antenna has been presented for triple band operation. Out of the 4 antennas, two are tuned to cover DCS (Digital Cellular System) downlink and two are tuned to cover DCS uplink frequency separately along with two common operating frequency centered around 2.45 GHz and 875 MHz. Four complementary split-ring resonators (CSRRs) have been etched in the ground plane exactly below the four patch antennas for attaining compactness from 0.36λ02 to 0.13λ02. In addition to this, by optimizing CSRRs outer radius, one lower common band operation of around 875 MHz (0.031λ02) has been obtained. Two, square split-ring resonators (SRRs) are placed between patch antennas to increase isolation by almost 7 dB around DCS band. The proposed MIMO antenna has been fabricated on an FR4 substrate (60×60×0.8) mm3 with dielectric constant, εr=4.3 having an antenna area of 0.13λ02. The Proposed MIMO antenna has two common operating bands, 850–900 MHz, 2410–2466 MHz and one individual band from 1725–1770 MHz for one group of two antennas of dimensions 17×22 mm2 and another individual band from 1800–1845 MHz for another group of two antennas of dimensions 17×23 mm2, where reflection coefficient is less than −10 dB with a minimum isolation of 17 dB. Diversity performance of the proposed MIMO antenna has been verified experimentally on all three bands. However, there is a slight deviation in the DCS operating band due to two different groups of antennas.

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10GbE connectivity is expected to be a standard feature of server platforms in the near future. Among the numerous methods and features proposed to improve network performance of such platforms is Direct Cache Access (DCA) to route incoming I/O to CPU caches directly. While this feature has been shown to be promising, there can be significant challenges when dealing with high rates of traffic in a multiprocessor and multi-core environment. In this paper, we focus on two practical considerations with DCA. In the first case, we show that the performance benefit from DCA can be limited when network traffic processing rate cannot match the I/O rate. In the second case, we show that affinitizing both stack and application contexts to cores that share a cache is critical. With proper distribution and affinity, we show that a standard Linux network stack runs 32% faster for 2KB to 64KB I/O sizes.

Objectives The primary outcome measures evaluated the financial toxicity and mental well‐being of the oral cancer survivors. Methods A cross‐sectional study of oral cancer survivors who were disease‐free for more than 6 months after treatment and visited the hospital for a routine follow‐up is included in the study. Mental well‐being and financial toxicity were evaluated using the Depression, Anxiety, and Stress Scale ‐ 21 (DASS 21) and Comprehensive Score for financial Toxicity (COST‐ Functional Assessment of Chronic Illness Therapy) questionnaires. A literature review was done to compare the results with financial toxicity and mental health in cancer patients from the pre‐pandemic era. Results A total of 79 oral cancer survivors were included in the study, predominantly males (M: F = 10:1). The age ranged from 26 to 75 years (The median age is 49). The full‐time employment dropped from 83.5% in the pre‐treatment period to 21.5% post‐treatment. Depression was observed in 58.2% and anxiety in 72.2%. Unemployed survivors were observed to have more depression (OR = 1.3, 95% confidence interval (CI) = 0.3–5.4, p = 0.6), anxiety (OR = 3.5, 95% CI = 0.3–21.2, p = 0.1) and stress (OR = 1.6, 95% CI = 0.3–6.6, p = 0.5) than rest of the cohort. On univariate analysis, unemployed survivors ( M = 11.8 ± 3.8, p = 0.01) had significantly poorer financial toxicity scores. Survivors with depression ( M = 16.4 ± 7.1, p = 0.06) and stress ( M = 14.4 ± 6.8, p = 0.002) had poor financial toxicity scores. On multifactorial analysis of variance, current employment ( p = 0.04) and treatment modality ( p = 0.05) were significant factors impacting the financial toxicity. Conclusion There is a trend towards increased incidence of depression, anxiety, and stress among oral cancer survivors compared to the literature from the pre‐COVID era. There is significant financial toxicity among either unemployed or part‐time workers. This calls for urgent public/government intervention to prevent the long‐term impact of financial toxicity on survival and quality of life.