Catalogue Search | MBRL
Are you sure you want to remove the book from the shelf?
{{itemTitle}}
5,564
result(s) for
"King, Daniel"
Sort by:
B s mixing observables and |V td /V ts | from sum rules
We consider the effects of a non-vanishing strange-quark mass in the determination of the full basis of dimension six matrix elements for Bs mixing, in particular we get for the ratio of the V − A Bag parameter in the Bs and Bd system: B¯Q1s/B¯Q1d=0.987−0.009+0.007\\[ {\\overline{B}}_{Q_1}^s/{\\overline{B}}_{Q_1}^d={0.987}_{-0.009}^{+0.007} \\]. Combining these results with the most recent lattice values for the ratio of decay constants fBs/fBd\\[ {f}_{B_s}/{f}_{B_d} \\] we obtain the most precise determination of the ratio ξ=fBsB¯Q1s/fBdB¯Q1d=1.2014−0.0072+0.0065\\[ \\xi ={f}_{B_s}\\sqrt{{\\overline{B}}_{Q_1}^s}/{f}_{B_d}\\sqrt{{\\overline{B}}_{Q_1}^d}={1.2014}_{-0.0072}^{+0.0065} \\] in agreement with recent lattice determinations. We find ΔMs = (18.5− 1.5+ 1.2)ps− 1 and ΔMd = (0.547− 0.046+ 0.035)ps− 1 to be consistent with experiments at below one sigma. Assuming the validity of the SM, our calculation can be used to directly determine the ratio of CKM elements |Vtd/Vts| = 0.2045− 0.0013+ 0.0012, which is compatible with the results from the CKM fitting groups, but again more precise.
Journal Article
Explainable machine-learning predictions for the prevention of hypoxaemia during surgery
Although anaesthesiologists strive to avoid hypoxaemia during surgery, reliably predicting future intraoperative hypoxaemia is not possible at present. Here, we report the development and testing of a machine-learning-based system that predicts the risk of hypoxaemia and provides explanations of the risk factors in real time during general anaesthesia. The system, which was trained on minute-by-minute data from the electronic medical records of over 50,000 surgeries, improved the performance of anaesthesiologists by providing interpretable hypoxaemia risks and contributing factors. The explanations for the predictions are broadly consistent with the literature and with prior knowledge from anaesthesiologists. Our results suggest that if anaesthesiologists currently anticipate 15% of hypoxaemia events, with the assistance of this system they could anticipate 30%, a large portion of which may benefit from early intervention because they are associated with modifiable factors. The system can help improve the clinical understanding of hypoxaemia risk during anaesthesia care by providing general insights into the exact changes in risk induced by certain characteristics of the patient or procedure.
An alert system based on machine learning and trained on surgical data from electronic medical records helps anaesthesiologists prevent hypoxaemia during surgery by providing interpretable real-time predictions.
Journal Article
Sport policy and politics in an era of austerity
Austerity is perhaps the major challenge of our times, given the speed at which it arrived and the consequences of its impact upon society. The global financial crash and economic downturn was the catalyst for change and, against a backdrop of advice from experts adverse to Keynesian economics, the ideology of austerity grew and became the dominant thinking to steer economies out of recession. This comprehensive volume draws upon both quantitative and qualitative research methodologies to provide a varied and contextually rich insight into sport, policy, and politics in an era of austerity.
Book
A case series on trauma care in Gaza: reflections
2 Among the victims were 816 civilians, 38 children, and 13 emergency medical service personnel. 3 In addition, 251 people, including 42 children, were abducted to the Gaza Strip by Hamas and other terrorist organisations. 3 Thousands of Israelis were injured, leading to mass casualty events at several hospitals. 4 Numerous women were subjected to sexual violence during the attack. 5 On Oct 7, 2023, Hamas targeted Israeli hospitals with rocket attacks. 6,7 Currently, approximately 100 Israelis, including children, remain hostage in Gaza with little or no information about their condition. 8 This is the true context of the conflict's onset. 10 In the case of Al-Shifa hospital, Hamas temporarily withdrew from the compound, only to return and force Israeli troops to re-enter the site, causing substantial destruction. 11,12 Can medical personnel be involved in war crimes committed by Hamas? In addition to ignoring the military actions taken by Hamas and other Palestinian groups in hospitals, Alser and colleagues included in their Article unsupported accusations and hearsay that the Israel Defense Forces purposefully targeted women, children, and older people.
Journal Article
The wedding
\"The day has finally arrived: the nuptials of Bruce Wayne and Selina Kyle. But their road to wedded bliss won't be easy. With visitors from this time and beyond, the Bat and the Cat will have to undergo even more trials and tribulations before they walk down the aisle.\"-- Provided by publisher.
BOOK
SU(3) breaking effects in B and D meson lifetimes
A
bstract
In the heavy quark expansion (HQE) of the total decay rates of
B
s
and
D
s
+
mesons non-perturbative matrix elements of four quark operators are arising as phase space enhanced contributions. We present the first determination of
m
s
effects to the dimension six matrix elements of these four quark operators via a heavy quark effective theory (HQET) sum rule analysis. In addition we calculate for the first time eye contractions of the four quark operators as well as matrix elements of penguin operators. For the perturbative part we solve the 3-loop contribution to the sum rule and we evaluate condensate contributions. In this study we work in the strict HQET limit and our results can also be used to estimate the size of the matrix element of the Darwin operator via equations of motion.
Journal Article
Cold days
\"In the aftermath of the wedding of Batman and Catwoman, the Dark Knight's life has changed completely. Having walked down the aisle, how will this new Bruce Wayne view himself? What is to become of Batman now?\"-- Provided by publisher.
Book
Macroscale double networks: highly dissipative soft composites
Hydrogels contain large amounts of water, making them useful in biomaterial applications. However, their inherent softness prevents their direct use in load-bearing applications. By incorporating toughening mechanisms through the double network concept, the mechanical properties of hydrogels have been greatly improved. In this Focus Review, our goal is to consider recent attempts to achieve hydrogel composites with further improved strength and toughness that could lead to the development of prosthetic biomaterials. We outline the way in which the double network concept improves the mechanical properties of gels and the specific mechanical traits that are enabled. We next review the current literature on soft composites, noting that the reinforcement mechanisms often differ from the double network concept, and summarize the types of properties that these materials can achieve. We also highlight the difficulties of working with hydrogels versus simple elastomers. Finally, we look at a recent subset of materials that utilize a mechanism analogous to the double network concept to achieve toughening on the macroscale. Macroscale double networks provide a unique opportunity to improve the mechanical properties of all soft materials for a wide range of applications.Sacrificial bonds break to dissipate energy and can increase the toughness of materials. Incorporating sacrificial bonds into hydrogels through the double network process enabled the first extremely tough hydrogels. In this Focus Review, we discuss the nature of sacrificial bonds, and how they can be used on the macroscale to enable tough soft composite materials. By matching the essence of the double network concept, we can make tough materials from macroscale composites for biomedical and engineering applications.
Journal Article