Effect of Rhythmical Disturbances on Repetitive Assembly Work

The field of industrial engineering has been traditionally based on the desire to produce more goods for less money. This goal has been accomplished by a variety of methods, including improved methods, monetary incentives, and nonmonetary incentives. In the modern industry all of these may be used. Studies to isolate the effects-of such types of incentives frequently, although not exclusively, have been conducted on highly repetitive tasks. This occurs for a number of reasons: 1. The simple task reduces the variability of the output both in quality and quantity. 2. Any given number of cycles will take less time since the time per cycle is shorter. 3. The learning curve quickly reaches the first plateau. 4. The work tends to have a simple rhythm which can be used to standardize the results. This rhythm itself has been defined as a series of cycles of motions accompanied by a feeling of grouping, that is, perceived as a series of distinct, separated cycles. Barnes, Watkins, and Burtt, in fact, have concluded the following: 1. Rhythm makes the task easier and more enjoyable. 2. The worker is physiologically attuned to rhythm. 3. There is a fundamental economy in rhythmical performance because a repetition of the act is obtained without an external repetition of the impulse. Other factors tend to work against an absolute rhythm. Davis studied the effects of productivity to determine what factors accounted for typical decrements in productivity and what changes in work habits appeared to cause decreases in production. Observations were collected over a period of six months on two experienced women operators engaged in semiskilled, light assembly work. He concluded that the work decrement in operations which are flexible in performance are largely the result of personal delays, rather than the product of fumbling, errors and slowing up. Personal delays consume about 24 percent of the workday and are consistent in pattern and vary negligibly from day to day. This finding was at variance with the theory at that time, although it is widely accepted now

A Wireless, Multi-Channel Printed Capacitive Strain Gauge System for Structural Health Monitoring

Structural health monitoring of soft structural textiles plays a key role within the space industry to ensure the safety and integrity of space habitats, parachutes, and decelerator systems. Strain monitoring could be an effective means to evaluate structural integrity, but conventional monitoring systems are not suitable because they are intended for large, rigid structures. To overcome the limitations of rigid sensors, we recently proposed using printed capacitive strain gauges (CSGs) on flexible substrates to monitor the structural health of soft structure materials. Here, we present a strategy and implementation of a wireless, multi-channel readout system for distributed monitoring of soft structural textiles with printed CSGs. The system is comprised of localized sensor motes and a wireless Bluetooth hub. The sensor mote employs a relaxation oscillator frontend to convert capacitance to frequency with a high dynamic range using only three interface wires per mote. The mote’s high dynamic range ensures compatibility with various gauge designs and accommodates significant process variation associated with printed gauges. Each hub enables users to read 8 channels of data wirelessly at a sampling rate of 100Hz and can be scaled to higher channel counts through the use of additional hubs. The sensor motes and wireless hub are miniaturized to accommodate flexible substrates, such as a Kevlar strap. The system is tested and exhibits excellent linearity and dynamic range

Ramanujan-type congruences modulo powers of 5 and 7

Let bℓ(n) denote the number of ℓ-regular partitions of n. In 2012, using the theory of modular forms, Furcy and Penniston presented several infinite families of congruences modulo 3 for some values of ℓ. In particular, they showed that for α, n ≥ 0, b25 (32α+3n+2 · 32α+2-1) ≡ 0 (mod 3). Most recently, congruences modulo powers of 5 for c5(n) was proved by Wang, where cN(n) counts the number of bipartitions (λ1,λ2) of n such that each part of λ2 is divisible by N. In this paper, we prove some interesting Ramanujan-type congruences modulo powers of 5 for b25(n), B25(n), c25(n) and modulo powers of 7 for c49(n). For example, we prove that for j ≥ 1, {c_{25}}\backslashleft( {{5{2j}}n + \backslashfrac{{11 \backslashcdot {5{2j}} + 13}}{{12}}} \backslashright) \backslashequiv 0c25(52jn+11⋅52j+1312)≡0(mod 5j+1), {c_{49}}\backslashleft( {{7{2j}}n + \backslashfrac{{11 \backslashcdot {7{_{2j}}} + 25}}{{12}}} \backslashright) \backslashequiv 0c49(72jn+11⋅72j+2512)≡0(mod 7j+1) and b25 (32α+3 · n+2 · 32α+2-1) ≡ 0 (mod 3 · 52j-1)

On a generalized basic series and Rogers-Ramanujan type identities

In this paper, we give the generalization of MacMahon's type combinatorial identities. A generalized $q$-series is interpreted as the generating function of two different combinatorial objects, viz., restricted $n$-color partitions and weighted lattice paths which give entirely new Rogers–Ramanujan–MacMahon type combinatorial identities. This result yields an infinite class of 2-way combinatorial identities which further extends the work of Agarwal and Goyal. We also discuss the bijective proof of the main result. Forbye, eight particular cases are also discussed which give a combinatorial interpretation of eight entirely new Rogers–Ramanujan type identities

The Effect of Different Foam Concentrations on Sperm Motility in Japanese Quail

A study was conducted to determine the effect of foam extract on sperm motility in the male Japanese quail (Coturnix coturnix japonica). Adult male quails (<12 weeks) of heavy body weight strain were housed in individual cages and divided into 5 groups according to the size of their cloacal glands. The data indicated that the size of the cloacal gland was positively correlated with the frequency of foam secretion and total foam production. One gram of freshly collected clean foam was mixed with 1.0 mL of normal saline and homogenized for 10 minutes. After centrifugation at 35 000 rpm, the supernatant was used as 100% foam extract. The extract was diluted to 1:40, 1:20, 1:10, and 1:4 with normal saline to produce 2.5, 5.0, 10, and 25% foam extracts, respectively. 5% foam extract enhanced sperm survival at room temperature (30°–35°C) for 2 to 3 hrs, whereas higher concentrations (10% and above) suppressed sperm motility. From this study, it may be concluded that foam secretion and quantity of foam are directly proportional to the size of the cloacal gland and that the foam enhances and prolongs sperm motility, in vitro at an optimum concentration of 5%

Inheritance of powdery mildew resistance in sunflower (Helianthus annuss L.)

Powdery mildew caused by Golovinomyces cichoracearum is the most important disease on sunflower worldwide. The investigation was undertaken to determine the mode of genetic inheritance of powdery mildew resistance in five F1 and F2 populations of sunflower. The four hybrids were derived by crossing resistant with susceptible genotype and one hybrid between resistant and highly susceptible genotype. Out of 23 hybrids, five crosses viz., PM-22x PM-36, PM-14xPM-36, PM-16xPM-38, PM-17xPM-35 and PM-34x PM-23 were resistant under natural as well as artificial epiphytotic screening conditions and the same five resistant hybrids segregated in 9R:7S ratio in F2 population indicating involvement of two independent loci controlling powdery mildew resistance in sunflower

Isolated ulnopalmar dislocation of 5th carpometacarpal joint: a rare case report

Isolated volar dislocations of the fifth carpometacarpal joints are an uncommon injury. They are classified as ulnopalmar or radiopalmar dislocations. It can be easily missed on standard radiographs. A high degree of suspicion and accurate reduction is pivotal in restoring the functional outcome of the hand. In our case report, a forty year old man presented with ulnopalmar dislocation of the fifth carpometacarpal joint and was treated with open reduction and K wiring. We review the literature and discuss the available methods of management

Clinical profile of acute myocardial infarction patients: a study in tertiary care centre

Background: Coronary Artery Disease (CAD) remains the major cause of mortality and morbidity of mankind. Even though lot of advances are made in diagnosis, management and prevention of the disease. Coronary Artery Disease (CAD) is the leading cause of death in the United States, affecting over 5 million Americans. It is the most common cause of death in most western countries.Methods: This study was carried out in Intensive Coronary Care Unit (ICCU) of McGann hospital, Shimoga. The material of study consisted of 100 consecutive patients of Acute Myocardial Infarction (AMI) admitted to ICCU of McGann hospital from January 2014 to November 2014. Only patients who satisfied World Health Organization (WHO) definition for the diagnosis of AMI were selected for the study.Results: The age of patients in this study ranged from 24 years to 85 years. Mean age 52.91 ± 13.19 years. Out of 100 cases, 82 were males and 18 were female. The male to female ratio was 4.5:1. Among the 100 patients studied, 92 patients (92%) had atleast on of the risk factors mentioned above and 46 patients (46%) had more than one risk factors. 45 of the 96 patients (46.88%) percentage to the hospital within 6 hours of onset of chest pain. The pulse rate was within normal limits in 65 patients (65%). 26 patients (26%) had tachycardia at time of presentation and 9 patients (9%) had bradycardia. In 29 patients (29%) blood pressure was more than 140/90 mmHg and 15 patients (15%) had hypotension at time of presentation. In remaining 56 patients (56%) blood pressure was within normal limits. JVP was elevated in 6 patients (6%). 4 patients (4%) were in cardiogenic shock at the time of presentation and 13 patients (13%) were in left ventricular failure.Conclusion: There is need for early detection of risk factor to prevent the progression of coronary heart disease, need for creating awareness in the community regarding risk factors, symptoms and signs of acute myocardial infarction so that early referral can be done to coronary care unit to prevent morbidity and mortality in the community.