Transformers and inductors for use in electronic and telecommunication equipment. Measuring methods and test procedures

SummaryThe present study concerned the reproducibility of the so-called prothrombin time as assessed with a series of more commonly used modifications of the Quick’s onestage assay procedure, i.e. the British comparative reagent, homemade human brain thromboplastin, Simplastin, Simplastin A, and Thrombotest. All five procedures were tested manually on pooled lyophilized normal and patients’ plasmas. In addition, Simplastin A and Thrombotest were investigated semiautomatically on individual freshly prepared patients’ plasmas. From the results obtained, the following conclusions may be drawn :The reproducibility of results obtained with manual reading on lyophilized plasmas is satisfactory for all five test procedures. For Simplastin, the reproducibility of values in the range of insufficient anticoagulation is relatively low due to the low discrimination power of the test procedure in the near-normal range (so-called low sensitivity of rabbit brain thromboplastins). The reproducibility of Thrombotest excels as a consequence of its particularly easily discerned coagulation endpoint.The reproducibility of Thrombotest, when tested on freshly prepared plasmas using Schnitger’s semiautomatic coagulometer (a fibrinometer-liJce apparatus), is no longer superior to that of Simplastin A.The constant of proportionality between the coagulation times formed with Simplastin A and Thrombotest was estimated at 0.64.Reconstituted Thrombotest is stable for 24 hours when stored at 4° C, whereas reconstituted Simplastin A is not.The Simplastin A method and Thrombotest seem to be equally sensitive to “activation” of blood coagulation upon storage.

Download Full-text

Use of a Lyophilized Reference Plasma to Compare Coagulation Test Procedures

Thrombosis and Haemostasis ◽

10.1055/s-0038-1651402 ◽

1975 ◽

Vol 34 (02) ◽

pp. 426-444 ◽

Cited By ~ 3

Author(s):

J Kahan ◽

I Nohén

Keyword(s):

Oral Anticoagulant Therapy ◽

Repeated Measurements ◽

Test Procedures ◽

Coagulation Activity ◽

Close Relationship ◽

Measured Activity ◽

Test Materials ◽

The Difference ◽

The Stability ◽

The One

SummaryIn 4 collaborative trials, involving a varying number of hospital laboratories in the Stockholm area, the coagulation activity of different test materials was estimated with the one-stage prothrombin tests routinely used in the laboratories, viz. Normotest, Simplastin-A and Thrombotest. The test materials included different batches of a lyophilized reference plasma, deep-frozen specimens of diluted and undiluted normal plasmas, and fresh and deep-frozen specimens from patients on long-term oral anticoagulant therapy.Although a close relationship was found between different methods, Simplastin-A gave consistently lower values than Normotest, the difference being proportional to the estimated activity. The discrepancy was of about the same magnitude on all the test materials, and was probably due to a divergence between the manufacturers’ procedures used to set “normal percentage activity”, as well as to a varying ratio of measured activity to plasma concentration. The extent of discrepancy may vary with the batch-to-batch variation of thromboplastin reagents.The close agreement between results obtained on different test materials suggests that the investigated reference plasma could be used to calibrate the examined thromboplastin reagents, and to compare the degree of hypocoagulability estimated by the examined PIVKA-insensitive thromboplastin reagents.The assigned coagulation activity of different batches of the reference plasma agreed closely with experimentally obtained values. The stability of supplied batches was satisfactory as judged from the reproducibility of repeated measurements. The variability of test procedures was approximately the same on different test materials.

Download Full-text

SISTEM AUTOMATIC SWITCH REDUNDANT UPS UNTUK BEBAN ESSENSIAL

Electro Luceat ◽

10.32531/jelekn.v5i1.144 ◽

2019 ◽

Vol 5 (1) ◽

pp. 35-45

Author(s):

Markus Dwiyanto Tobi ◽

Alimuddin Mappa

Keyword(s):

Power Supply ◽

Working Condition ◽

Control Circuit ◽

Energy Sources ◽

Main Equipment ◽

Telecommunication Equipment ◽

Input Condition ◽

Research Designs ◽

Switch Circuit

The role of the power supply device is to produce, process and distribute energy sources. Telecommunication equipment can only operate if it has continuous supply. Therefore, to maintain the continuity of the supply, a UPS (Uninterruptable Power Supply) device system is needed so that the supply to the Essential Load device will remain available so that continuity will be maintained. This research designs and proposes how a series of automatic redundant switch systems on UPS to ensure the availability of power supply for the main equipment of telecommunications systems. The Auto switch circuit is designed to have 3 (three) working stages which will trigger the relay driver as control circuit, namely the normal working condition of the contactor input K1 is present, the input condition is zero (lost), and the input condition is present. This system can automatically supply power to telecommunications equipment.

Download Full-text

PRESSS 3: The Five-Story Precast Test Building Vol. 3-3 - Design Verification, Instrumentation &Test Procedures,

10.15554/pci.rr.seis-013 ◽

2002 ◽

Author(s):

Sri Sritharan ◽

Stefano Pampanin ◽

James R. Conley

Keyword(s):

Design Verification ◽

Test Procedures

Download Full-text

The ‘Psychology’ of Polygraph’: Engendering Differential Salience - Concerns and Caveats

Journal of Psychological Research ◽

10.30564/jpr.v2i2.1465 ◽

2020 ◽

Vol 2 (2) ◽

Author(s):

Friedo Herbig

Keyword(s):

Language Proficiency ◽

Human Behaviour ◽

Validity And Reliability ◽

Test Procedures ◽

Behaviour Modification ◽

Level Of Education ◽

Governing Body ◽

Per Se ◽

Emotional Salience ◽

Polygraph Examination

The ‘success’ of a polygraph examination is predicated on the establishment of differential or emotional salience (a ‘psychological set’) with an examinee. This, according to polygraph proponents, guarantees that an examinee will respond appropriately during the administration of the in-test (questioning) phase of the polygraph examination. However, polygraph procedure, as prescribed by its governing body, the American Polygraph Association (APA), is a static clinical Westernised process that does not make any provision for human multiplicity (culture/ethnicity, idiosyncrasies, level of education, language proficiency, ideologies, and so forth). Identical (one size fits all) test procedures are applied across the board – a highly controversial methodology. This article, instead of rigidly focusing on validity and reliability issues per se, explores the degree to which certain intentional and unintentional human behaviour modification strategies have the potential to counterbalance claimed polygraph rectitude from a metaphysical and discursive standpoint. The article exposes concerns (potential flaws) relating to polygraph theory in the context of the ‘psychological set’ and is intended to serve as a caveat regarding the unmitigated use thereof.

Download Full-text