This study assessed the effectiveness of a worksite wellness program. A within-group study design was conducted. Assessment was based on 3737 continuously employed workers at a large agribusiness during 2007-2009. More than 80% of employees participated in the program, with a higher percentage of women participating. Clinically significant improvements occurred in those who were underweight, those with high systolic or diastolic blood pressure, high total cholesterol, high low-density lipoprotein, low high-density lipoprotein, high triglycerides, and high glucose. Among obese employee participants, significant improvements occurred in selected mental health and dietary variables. Among those who lowered their BMI, significant decrease occurred in fat intake, and significant increase resulted in weekly aerobic exercise and feelings of calmness and peace, happiness, ability to cope with stress, and more physical energy.
The "Q-curves" Q 1 (c) = c, Q 2 (c) = c 2 + c, . . . , Q n (c) = (Q n−1 (c)) 2 + c = f n c (0) have long been observed and studied as the shadowy curves which appear illusively -not explicitly drawnin the familiar orbit diagram of Myrberg's map f c (x) = x 2 + c. We illustrate that Q-curves also appear implicitly, for a different reason, in a computer-drawn bifurcation diagram of x 2 + c as well -by "bifurcation diagram" we mean the collection of all periodic points of f c (attracting, indifferent and repelling) -these collections form what we call "P -curves". We show Q-curves and P -curves intersect in one of two ways: At a superattracting periodic point on a P -curve, the infinite family of Q-curves which intersect there are all tangent to the P -curve. At a Misiurewicz point, no tangencies occur at these intersections; the slope of the P -curve is the fixed point of a linear system whose iterates give the slopes of the Q-curves.We also introduce some new phenomena associated with c sin x illustrating briefly how its two different families of Q-curves interact with P -curves.Our algorithm for finding and plotting all periodic points (up to any reasonable period) in the bifurcation diagram is reviewed in an Appendix.
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