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Management systems help organizations achieve their objectives, and auditing them makes good business sense. The International Standard for auditing management systems has just been updated, giving more guidance than ever before.
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Can we trust current food security systems? Specialists explain why the new edition of ISO 22000 is a timely response to the growing global challenges to food safety.

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Jun. 15, 2015, 7:58 PM
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Disclaimer Get real-time TWTR charts here »

The tweets that flow across the service every day appear to have stalled during the past year and a half.

The "about" page on Twitter's website says that 500 million tweets are sent on the service every day. That number is unchanged from November 2013, when Twitter's IPO prospectus said that "our users create approximately 500 million Tweets every day."

Back then Twitter had 215 million monthly active users. Today Twitter has 302 million active users.

With Twitter's user base now roughly 40 percent larger, the apparent lack of a corresponding increase in tweets per day suggests that Twitter users are not tweeting with the same gusto they once were; perhaps they're even tweeting less.

The other possibility is that new people are coming on to the service and only reading others' tweets, not participating.

The plateau in daily tweets could represent another big challenge for Twitter's next CEO.


Dick Costolo, the current CEO, said last week Tamaris Fee 112248520 stPLU7kjY
and be replaced by co-founder Jack Dorsey on an interim basis. The changing of the guard comes as Twitter's stock has contracted and as Wall Street has grown increasingly impatient with the company's struggles boosting its number of users.

A Twitter spokesperson declined to comment on the frozen tweets per day number.

It's possible that Twitter has simply not publicly updated the number. But with so much public focus on Twitter's growth right now, it seems odd that Twitter would not update the tweets per day figure if there was an improvement to highlight.

Status unknown

In the past, Twitter has updated the tweets per day metric whenever it hit a nice round number. Twitter said it had Rieker 53734 Doris 34 qPoWJLHrof
, for instance, and announced the 500 million tweets per day figure in November 2013.

The fact that Twitter has not updated the latest number suggests that tweets per day have not yet reached 600 million.


How big a problem is that?

Twitter has long acknowledged that a significant portion of its users log on to the service to consume content, that is, to read tweets, rather than to post their own tweets on the service. Twitter makes money from ad impressions, which occur when someone views a tweet or shares a tweet, not when someone creates a tweet - so there's no immediate financial impact.


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Gesundheitswesen 2016; 78 - A164 DOI: 10.1055/s-0036-1586674

Forschungsergebnisse zeigen, dass körperliche Aktivität in einem zeitlichen Umfang von mindestens drei Stunden pro Woche die Wahrscheinlichkeit eines Brustkrebsrezidivs sowie die Brustkrebssterblichkeit reduziert (Holmes et al., 2005). Doch körperliche Aktivität in einem hohen zeitlichen Umfang in den Alltag zu integrieren, stellt für viele Frauen nach Brustkrebs, die bislang wenig oder gar nicht aktiv sind, eine Herausforderung dar. Wünschenswert wären motivational-volitional angelegte Interventionen, die sich zielgruppenspezifisch an Frauen mit geringer körperlicher Aktivität richten. Bislang unbekannt ist der genaue Anteil der wenig bis inaktiven Frauen nach Brustkrebs. Ziel der vorliegenden Studie ist es, den Umfang von körperlicher Aktivität bei Frauen nach Brustkrebs zu erfassen.

Von Mai bis November 2015 wurde in zwei Rehabilitationseinrichtungen (Reha-Zentrum Utersum, Klinik Wehrawald) eine querschnittliche Befragung durchgeführt. Direkt nach Anreise erhielten die Frauen einen Kurzfragebogen zur Erfassung der Sportaktivität (Fuchs et al., 2015). Für die Beantwortung stehen drei Textfelder zur Verfügung, um ausgeübte Sportaktivitäten einzutragen sowie Felder für Angaben zur Häufigkeit und Dauer im letzten Monat. Frauen, welche sich weniger als 60 Minuten pro Woche sportlich betätigen, wurden zu einer Interventionsstudie eingeladen und bei Teilnahme u.a. zu Alltagsaktivitäten (Fuchs et al., 2015) befragt. Die Auswertung erfolgte deskriptiv. Die Einwilligung zur Teilnahme war freiwillig und die Befragung erfolgte verschlüsselt.

Die Stichprobe besteht aus n = 895 Rehabilitandinnen (47% Klinik Wehrawald, 53% Reha-Zentrum Utersum). Der Anteil der Frauen, die gar nicht oder nur in einem geringen Umfang sportlich aktiv sind (< 60 Min/Wo) beträgt 50,2% (n = 449). Bezogen auf die sportlich aktiven Frauen, beträgt die durchschnittliche Dauer an sportlicher Aktivität 167 Minuten (Median = 120 Min/Wo, Min: 2,50 Min/Wo, Max: 28 Std/Wo, 95% CI = 154 – 180). Die Befragung der wenig sportlich aktiven Frauen (n = 371) aus der Interventionsgruppe zeigt jedoch eine hohe durchschnittliche Alltagsaktivität von 636 Minuten pro Woche (95% CI = 498 – 773), wobei Hausarbeit (n = 323) mit 278 Minuten am häufigsten genannt wird.

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