Enabling Fine Sample Rate Settings in DSOs with Time-Interleaved ADCs

The time-base used by digital storage oscilloscopes allows limited selections of the sample rate, namely constrained to a few integer submultiples of the maximum sample rate. This limitation offers the advantage of simplifying the data transfer from the analog-to-digital converter to the acquisition memory, and of assuring stability performances, expressed in terms of absolute jitter, that are independent of the chosen sample rate. On the counterpart, it prevents an optimal usage of the memory resources of the oscilloscope and compels to post processing operations in several applications. A time-base that allows selecting the sample rate with very fine frequency resolution, in particular as a rational submultiple of the maximum rate, is proposed. The proposal addresses the oscilloscopes with time-interleaved converters, that require a dedicated and multifaceted approach with respect to architectures where a single monolithic converter is in charge of signal digitization. The proposed time-base allows selecting with fine frequency resolution sample rate values up to 200 GHz and beyond, still assuring jitter performances independent of the sample rate selection.

Automated Hematoxylin and Eosin Staining with Leica AutoStainer XL v1

PURPOSE: To stain formalin fixed paraffin tissue for microscopic evaluation. Hematoxylin will stain the nuclei of the tissue blue/purple and Eosin will stain cytoplasmic elements a spectrum of brilliant pink. QUALITY CONTROL: Fixation: 10% Neutral Buffered Formalin Technique: Paraffin sections at 5 microns Control: PCRL PROCEDURE: Station #Time in StationExact Time?Solution Name185:00NoXylene175:00NoXylene165:00NoXylene150:20No100% Alcohol140:20No100% Alcohol130:20No95% Alcohol120:20No70% AlcoholWash 11:20NoWater83:30YesHematoxylinWash 20:30YesWaterWash 30:30YesWater90:10YesAcid AlcoholWash 40:30YesWater100:10YesAmmonia WaterWash 50:30YesWater112:00Yes95%70:20YesEosin60:30Yes95%50:30Yes100%40:30Yes100%30:30NoXylene21:00NoXylene11:00NoXylene RESULTS: Nuclei……………………………………………..……………Blue/Purple Cytoplasmic Elements………………………………….Shades of brilliant pink For digital storage and possible pathology review slides are scanned on the Leica Aperio slide scanner. The file output is .svs and can be viewed by downloading freely available software from Leica.

Molecular-level similarity search brings computing to DNA data storage

As global demand for digital storage capacity grows, storage technologies based on synthetic DNA have emerged as a dense and durable alternative to traditional media. Existing approaches leverage robust error correcting codes and precise molecular mechanisms to reliably retrieve specific files from large databases. Typically, files are retrieved using a pre-specified key, analogous to a filename. However, these approaches lack the ability to perform more complex computations over the stored data, such as similarity search: e.g., finding images that look similar to an image of interest without prior knowledge of their file names. Here we demonstrate a technique for executing similarity search over a DNA-based database of 1.6 million images. Queries are implemented as hybridization probes, and a key step in our approach was to learn an image-to-sequence encoding ensuring that queries preferentially bind to targets representing visually similar images. Experimental results show that our molecular implementation performs comparably to state-of-the-art in silico algorithms for similarity search.

Reading Tapes Backwards: A Legitimate Approach to Saving Time and Money in Digitization Projects?

Audio carriers are subject to a fast and irreversible decay. In order to save valuable historical recordings, the audio signal and other relevant information can be extracted from the source audio document and stored on another medium, normally a redundant digital storage system. This procedure is called ’content transfer’. It is a costly and time-consuming procedure. There are several solutions with which the cost can be reduced. One consists of picking up all tracks from a two-sided tape in one pass. This means that some tracks will be digitized forward and some backwards, to be subsequently corrected in the digital workstation. This article is concerned with the question of whether reading tracks backwards introduces unwanted effects into the signal. In particular, it investigates whether a difference can be observed between audio signals read forward or backwards and, if so, whether the difference is measurable. The results show that a difference can be observed, yet this is not enough to conclude that this “backwards” approach should not be used. The complexity of the situation is presented in the discussion. Future work includes reproducing this experiment with different audio equipment, as well as a perception test with human subjects.

Blockchain based Digital Storage System

The ideа is tо соnstruсt а рlаtfоrm whiсh аllоw the рeорle tо stоre their legаl identifiсаtiоns withоut the feаr оf identifiсаtiоn theft. The рeорle using this рlаtfоrm will hаve соmрlete соntrоl оn the infоrmаtiоn they wаnt tо shаre оr nоt. Identity theft is the deliberаte use оf sоmeоne else's identity, usuаlly аs а methоd tо gаin а finаnсiаl аdvаntаge оr оbtаin сredit аnd оther benefits in the оther рersоn's nаme, аnd рerhарs tо the оther рersоn's disаdvаntаge оr lоss. The рersоn whоse identity hаs been аssumed mаy suffer аdverse соnsequenсes, esрeсiаlly if they аre held resроnsible fоr the рerрetrаtоr's асtiоns. Identity theft оссurs when sоmeоne uses аnоther's рersоnаlly identifying infоrmаtiоn, like their nаme, identifying number, оr сredit саrd number, withоut their рermissiоn, tо соmmit frаud оr оther сrimes. Identity thefts hаve inсreаsed exроnentiаlly in this erа оf digitаlizаtiоn. Using this рlаtfоrm, nоt оnly the рeорle will hаve best in сlаss рrоteсtiоn but аlsо full аuthоrity оn whаt infоrmаtiоn shоuld be shаred аnd оn whiсh рlаtfоrm.

Blockchain Technology for Secure Accounting Management: Research Trends Analysis

The scope of blockchain technology, initially associated with the cryptocurrency Bitcoin, is greater due to the multiple applications in various disciplines. Its use in accounting lies mainly in the fact that it reduces risks and the eventuality of fraud, eliminates human error, promotes efficiency, and increases transparency and reliability. This means that different economic sectors assume it as a recording and management instrument. The aim is to examine current and emerging research lines at a global level on blockchain technology for secure accounting management. The evolution of the publication of the number of articles between 2016 and 2020 was analyzed. Statistical and mathematical techniques were applied to a sample of 1130 records from the Scopus database. The data uncovered a polynomial trend in this period. The seven main lines of work were identified: blockchain, network security, information management, digital storage, edge computing, commerce, and the Internet of Things. The ten most outstanding emerging research lines are detected. This study provides the past and future thematic axes on this incipient field of knowledge, which is a tool for decision-making by academics, researchers, and directors of research investment programs.

The Development of Cryptocurrencies as a Payment Method in South Africa

The use of currency as a medium of exchange for goods and services is essential in our daily lives. The concept of currency evolved from bartering to the use of coins and notes and now to the current digital age as the continuation of society's advancement has led to a new series of technological innovations with regard to payment methods around the world. Methods of payment are built on various platforms such as mobile phones, the internet, and digital storage cards. These payment systems have fostered the development and growth of fintech companies such as Paypal, Apple Pay, Samsung Pay, Alipay and others. The latest development is the use of blockchain to facilitate payments, more specifically the use of cryptocurrencies to facilitate transactions. The most popular cryptocurrency is bitcoin. Payments form part of commercial contracts which parties have a legal obligation to perform. South Africa has a legislative framework for payment systems wherein users have rights and obligations. This article will discuss the development of currency in South Africa and determine whether the current legislative framework for payment systems is applicable to cryptocurrencies such as bitcoin.

Taking the reins: a proposal for managing the previously unmanaged Royal Agricultural Winter Fair Archive

The Royal Agricultural Winter Fair (The Royal) has been a renowned national event in Toronto’s history since its debut in 1922. The annual fair is held for 10 days each November, and is the largest combined indoor horse show and agricultural fair in the world. As The Royal approaches its centenary year, the timing was perfect to deeply examine the previously-unmanaged collection of over 180,000 photographic objects and ephemera, and nearly seven metres of textual material, that has accumulated over the span of its rich history. Through a thorough review of the collections content and advice for both physical storage of the collection and collections management software options including digital storage, this thesis presents a list of recommendations for creating an accessible archive of this material, a resource that will enable this wonderful collection of important local, provincial, and national history to be preserved and made available to the public.