Public Relations: State of the Field

Public relations is both a professional practice and a subfield of communication with its own research and theory base. Public relations is relatively young as an academic field, however, having developed identifiable theory in only about the last 50 years. The field of public relations is developing into a theoretically based area of applied communication that has the potential to inform several areas of communication/mass communication and to offer theoretic and conceptual tools useful in health, risk, and political communication, among others. Because many readers are unfamiliar with public relations theory and research, this article first reviews and summarizes theory-related scholarship in public relations, then categorizes and explains the theoretic trends in the field. The article concludes by demonstrating how one of public relations' theoretic/conceptual tools, issues management, can apply across all areas of applied communication.     

Organizational Communication: Challenges for the New Century

Organizational communication covers an eclectic mix of approaches, theories, and methodologies, developed within organizational settings or applied from other areas. The authors start their assessment of recent literature with 6 challenges for the field that have been delineated in previous reviews: (a) to innovate in theory and methodology, (b) to acknowledge the role of ethics, (c) to move from micro- to macrolevel issues, (d) to examine new organizational structures and technologies, (e) to understand the communication of organizational change, and (f) to explore diversity and intergroup aspects of communication. All 6 challenges implicate the importance of considering the intergroup level of analysis as well as the interpersonal and organizational levels, to undertake multilevel research in context, and to consider the role and place of voice in organizations. Finally, researchers must make their research ethical and consequential.     

Mapping Visual Studies in Communication

This essay documents the main currents of visual studies in communication. After a brief history of the emergence of the field, we review the record of published research in books and journals during the past 5 years, identifying major strains of theory, key issues, and topical categories. We then apply the strains of thought to classify papers presented at the ICA conferences, noting patterns and shifts across and within ICA divisions and interest groups. Based on these patterns, as well as on informal input from colleagues, we map the discipline formation of visual studies and identify trends in institutional development. We conclude by exploring future directions for the field now that the visual interest group has grown to become the Visual Studies Division of ICA.     

Popular Communication After Globalization

The study of popular communication is carried out in many disciplines and many sites. It is often haunted by anxieties over high culture versus low culture and authenticity versus commercialization. Rejecting those binaries in favor of the dominance of the latter term in each, this article initially defines popular communication as objects widely circulated by mass media, texts to which people are widely exposed. Such texts are themselves commodities, and the meanings the texts facilitate are key. Scholars of popular communication usually espouse a leftist political agenda. They focus on signs that reveal processes in social or psychological experience, although some studies focus more on forms of discourse. The article proposes that studies in popular communication may be distinguished by whether they focus on rhetor, text, or audience. It concludes by urging a stance of critical populism, more popular involvement by scholars, and a greater understanding of erotics, or desire, in our work.     

忆阻器堆叠交叉阵列漏电流问题研究进展

忆阻器是一种新型的非易失性存储器,具有结构简单、功耗低、集成密度高、类突触性质等特点。忆阻器主要以交叉阵列的形式作为人工突触,被用于构造人工神经网络,然而,忆阻器的交叉阵列面临着潜在的通路漏电流问题,这阻碍了忆阻器的进一步应用。文章简要分析了忆阻器堆叠交叉阵列产生漏电流的原因,主要介绍了二极管-忆阻器、选通器-忆阻器、晶体管-忆阻器等多种抑制漏电流的方案,总结并展望了超大规模集成忆阻器的应用前景。     

数字式温湿度传感器SHTl1在尘埃检测仪中的应用

介绍PC-3C激光高浓度粉尘检测仪的系统原理.着重讨论了系统中的数字式一体化温湿度传感器SHTl1的内部结构、基本性能、工作原理,分析了它的时序和接口电路,得出SHTl1的相关优点,最后给出了SHTl1在系统中进行温湿度测量的具体实现.     

E1/2.4GHz无线传输系统基带电路的研究

主要分析了基于E1信号处理芯片DS21354的PRISM Ⅱ2.4GHz无线扩频数据传输系统基带处理电路,提出了一种实现E1(2.048Mbps)PCM数据链路到5.376Mbps扩频处理芯片数据交换的方法。设计中应用CPLD编制相应逻辑配合两片SRAM实现FIFO缓冲的功能,从而实现两种不同码率的变换,满足整个系统时分双工的工作要求。     

Self-Amplification Immunomodulatory Strategy for Tissue Regeneration in Diabetes Based on Cytokine-ZIFs System

Dysfunctional macrophages and excessive inflammatory responses lead to severe tissue regeneration disorders in diabetes. Herein, a function-oriented self-amplification immunomodulatory (SAI) strategy based on an interleukin-33 (IL-33) loaded zeolitic imidazolate frameworks (IL@ZIF) nano-platform is proposed to treat tissue regeneration disorders by restoring macrophage function and reconstructing immune microenvironment in diabetes. It is found that ZIFs effectively protect IL-33 from premature degradation. In the wound area, the released Zn²⁺ not only improves the antioxidant capacity of macrophages to avoid reactive oxygen species-induced dysfunction, but also upregulates IL-33 receptor (ST2L) expression and triggers M2 macrophages polarization. Subsequently, the released IL-33 significantly amplifies M2 macrophage polarization through IL-33/ST2L signaling, resulting in a reversal of the pro-inflammatory microenvironment of diabetic wounds. This synergistic effect endows the nano-platform with an excellent ability to accelerate tissue regeneration in vitro and in vivo. Overall, this IL@ZIF mediated function-oriented SAI strategy provides new alternatives for the treatment of tissue regeneration disorders in diabetes.     

某种型号的交换设备EMC摸底试验整改记录

本文介绍了某种型号通讯产品进行EEMC摸底试验项目情况,并且针对试验过程中出现的一些问题,简单介绍了改进思路和整改情况.     

自动切换光路保护方案的应用与实现

针对光纤传输系统中光缆故障的解决方案,通过自动监测线路故障实现主备光纤问的实时切换,满足50ms电信级切换时间要求,以达到光传输设备间透明、无阻断通信的目的.通过对自动切换光路保护系统的系统结构的讨论,从实际应用角度出发,对基本原理、设计方案、软硬件结构及器件选择等方面进行了分析和研究,实现了完全满足电信标准要求的通信光路自动切换保护.     

中国电离层F1层出现率的特性

利用大量的电离层观测资料分析了我国电离层Ｆ１层出现率的特点，结果表明，出现率跟太阳天顶角有着很好的相关性。当出现率在１和０之间时，它大致地随太阳天顶角的增大而线性地减少小。     

A Chemoimmunotherapy Nanogel Enables Efficient Delivery of Interleukin-2 and Induction of Immunogenic Cell Death for Effective Cancer Therapy

Interleukin-2 (IL-2) is one of the first FDA-approved immunotherapeutics, but its use is limited by toxicity and low efficacy. In addition, all immunotherapies are limited by the immunosuppressive and desmoplastic microenvironment of “immunologically cold” tumors, such as pancreatic ductal adenocarcinoma (PDAC) or hepatocellular carcinoma (HCC) with advanced liver fibrosis. Here, a new chemoimmunotherapy nanogel (IL2-Pt@Nanogel) for dual delivery of IL-2 and the type II immunogenic cell death inducer Pt-NHC that reduces the immunosuppressive phenotype of tumor-associated macrophages and diminishes regulatory T cell infiltration by inducing the production of type I interferon (IFN) by cancer cells is reported. Combining the angiotensin II receptor blocker losartan with IL2-Pt@Nanogel treatment reduces desmoplasia and reprogrammes the microenvironment of PDAC and HCC toward an immunostimulatory one. These effects result in potent anti-tumor efficacy in models of primary and metastatic PDAC and HCC with underlying liver fibrosis. This study presents a strategy for IL-2-based chemoimmunotherapy with the potential for clinical translation to treat solid tumors.     

如何有效监控终端运行质量——以电力远程抄表业务为例

随着CDMA 1X应用的快速发展，如何对行业应用终端进行有效监控，使其达到客户的要求；如何总结行业应用终端的监控方法，使其对未来的3G应用起到指导作用，研究并解决这些课题已引起行业内的广泛关注。     

基于门时延的时间间隔测量系统的实现及其不确定度分析

文章介绍了一种基于门时延的时间间隔测量系统的实现方法,简述了所用芯片的结构和特性;然后给出了时间间隔测量系统的软硬件设计思路。最后对整个测量系统的测量不确定度进行分析,证明了此方式的实现成本低、模块体积小、可靠性高。     

基于gm(1,1)模型的垂直切换算法仿真研究

在matlab环境下,仿真得到基于GM(1,1)模型动态预测垂直切换过程中的接收信号强度,在原始数据较少的情况下,依然有较高的预测准确度.通过仿真结果分析,在垂直切换过程中,基于GM(1,1)模型预测接收信号强度的方法有需要原始数据少、准确性高、复杂度较小等优点.     

通信网络测试仪表中CAP软件模块的研究与实现

为了简单正确地将CAP协议运用于应用系统中,遵循基于ASN.1的CAP协议编码规范,采用面向对象的软件设计方法,开发研究出运用于通信测试仪表的CAP软件模块.从用户需求分析出发,介绍了软件的系统设计和实现方法,并ⅱ在实践中得到应用.