Categorical working memory codes in human visual cortex

Working memory contents are represented in neural activity patterns across multiple regions of the cortical hierarchy. It has remained unclear to which degree this reflects a specialization for different levels of abstraction. Here, we demonstrate that for color stimuli categorical codes are already present at the level of extrastriate visual cortex (V4 and VO1). Importantly, this categorical coding was observed during working memory, but not during perception.

HISTORICAL POLICY AND COMMUNICATIVE MEMORY OF THE DNIPRO STEPPE RURAL RESIDENTS

The aim of the work is to study the mechanisms of constructing communicative memory of the residents of modern villages of Hrushivka (Apostolove District, Dnipropetrovsk Oblast) and Kapulivka (Nikopol District, Dnipropetrovsk Oblast). The settlements under research are directly connected with the location of the Bazavluk (1593-1638) and Chortomlyk (1652-1709) Siches on their territory and realization of one of the large-scale Soviet economical experiments – the program of general electrification, leading to creation of artificial seas and construction of hydroelectric stations. Research methodology.Proceeding from modern methodological approaches in the sphere of memory studies, instruments of oral history, generalizations of fragmentary regional studies, the interrelation of national meta-narrative with the local history was analyzed. The article employs methods of filmography, which potentiated the definition of both the official directions and assessment of the Soviet transformations, directly connected with the territory and certain localities the article deals with, and the local population’s attitude towards these processes, engaging available scripts, documentary and feature films of the 20-ies - 50-ies of the XX century. The methods mentioned above and their implementation stress the novelty of the research. Conclusions Seas need territories, which in this case were taken from people. Destroyed villages and flooded cultures, churches, other unique religious buildings, natural phenomena became the objects of memorialization and communicative memory of the residents of mentioned locations. The article discovers the ways of “imprinting” of the general political situation in the country on the regional contexts of remembering, which have been adapted / fit into a new nation-scale myth since early 90-ies of the XX century, providing the Cossack pages of history with a prominent role. The formation of a new historical narrative in the early 90-ies and the corresponding model of memory, its communicative version received additional incentives for preservation and adaptation to the demands of the time. Thus, the memory of the past, with corresponding memory codes, and the “glory” of the villages of Hrushivka and Kapulivka are used from the standpoint of the present.

An Efficient Approach of Threat Hunting Using Memory Forensics

The capacity and occurrence of new cyber-attacks have shattered in recent years. Such measures have very complicated workflows and comprise multiple illegal actors and organizations. Threat hunting demonstrates the process of proactively searching through networks for threats based on zero-day attacks by repeating the hunting process again and again. Unlike threat intelligence, it uses different automated security tools to collect logs in order to provide a pattern for making new intelligence-based tools by following those logs. According to our research findings about “threat hunting tools” there’s a major flaw that the designed tools are limited to the collection of logs. It works completely on logs for generating new patterns avoiding system’s main memory. Codes written directly to memory fail this process to provide proactive hunting. To overcome this major challenge, we are proposing two distinct methods, either by generating malicious code alerts or by binding memory forensics processes with threat hunting tools to make active hunting possible

Impaired spatial memory codes in a mouse model of Rett syndrome

The Mecp2+/- mouse model recapitulates many phenotypes of patients with Rett syndrome (RTT), including learning and memory deficits. It is unknown, however, how the disease state alters memory circuit functions in vivo in RTT mice. Here we recorded from hippocampal place cells, which are thought to encode spatial memories, in freely moving RTT mice and littermate controls. We found that place cells in RTT mice are impaired in their experience-dependent increase of spatial information. This impairment is accompanied by an enhanced baseline firing synchrony of place cells within ripple oscillations during rest, which consequently occludes the increase in synchrony after a novel experience. Behaviorally, contextual memory is normal at short but not long time scale in RTT mice. Our results suggest that hypersynchrony interferes with memory consolidation and leads to impaired spatial memory codes in RTT mice, providing a possible circuit mechanism for memory deficits in Rett Syndrome.