Scaling and Suppression of Anomalous Heating in Ion Traps

We measure and characterize anomalous motional heating of an atomic ion confined in the lowest quantum levels of a novel rf ion trap that features moveable electrodes. The scaling of heating with electrode proximity is measured, and when the electrodes are cooled from 300 to 150 K, the heating rate is suppressed by an order of magnitude. This provides direct evidence that anomalous motional heating of trapped ions stems from microscopic noisy potentials on the electrodes that are thermally driven. These observations are relevant to decoherence in quantum information processing schemes based on trapped ions and perhaps other charge-based quantum systems

Zoning Finality: Reconceptualizing Res Judicata Doctrine in Land Use Cases

Zoning disputes provide many Americans with their only firsthand exposure to the workings of democratic government. Land use issues trigger participation because neighbors perceive the wrong kind of development as posing a double-barreled threat to the stability of the community in which they have chosen to live and to the economic value of their homes. The protagonists in zoning disputes-landowners and neighbors-invest time and other resources to persuade the relevant decisionmakers to rule in the protagonists’ favor. When the parties make that investment, should they assume that a decision made today will have some enduring significance? Whether the decision is “final” may play an important role in shaping the parties’ participation and presentations. If a zoning board were free to deny a variance today and to grant the identical variance next week (or next year), there would be less reason for neighbors (and landowner applicants) to spend time and money framing their arguments for today’s decision. Many of the reasons that underlie res judicata doctrine apply to these local land use disputes. In the interest of conserving the resources of all parties- landowners, neighbors, and local decisionmakers-issues should be decided once, not multiple times. There is little reason to think that, were the issues decided multiple times, subsequent determinations would improve on prior ones. This is especially true in the context of land use, where the issues involve primarily questions of fact, and parties have incentives to come forward with all relevant information at the time the first decisionmaker considers the dispute. If a court, rather than a zoning board, were resolving the dispute, res judicata doctrine would circumscribe the power of a subsequent court to depart from the earlier determination. In the first instance, however, zoning disputes are resolved not by the courts, but by local legislatures and administrative bodies. No finality principle comparable to res judicata attaches to legislative determinations, no matter which legislative body-Congress, a state legislature, or a local city council- makes those determinations. Unlike most judicial decisions, which resolve discrete disputes over past events, legislatures act prospectively. Finality rules would preclude legislative decisionmakers from considering new facts that cast doubt on the wisdom of past decisions. It should not be surprising, then, that legislatures are typically free of finality constraints. In contrast to the well-established principles that apply to judicial and legislative determinations, the applicability of finality principles is unclear when it comes to administrative decisions by the local zoning board, such as the grant or denial of a variance. Courts sometimes treat zoning board decisions as if they were judicial decisions, using res judicata language to preclude new applications for relief that the zoning board previously denied. In other cases, courts-often from the same jurisdictions-permit boards to entertain applications virtually identical to previously rejected applications. Although courts sometimes suggest the need to be “flexible” in applying res judicata doctrine to zoning disputes, neither courts nor scholars have offered a coherent prescriptive or descriptive account for how that flexibility does or should operate. This Article has two related objectives: to develop a normative theory explaining how finality principles should apply in the land use context and simultaneously to argue that existing case law, however inarticulately, reflects that normative theory. Part I begins by exploring the distinctive structure of zoning doctrine, which fits imperfectly with traditional categorization of decisions as legislative or judicial. Part II examines more generally the role of finality in legal decisionmaking. Part III demonstrates that, in light of the structure of zoning doctrine, traditional claim preclusion doctrine should have no place in zoning law. This Article argues, by contrast, that issue preclusion doctrine should and does operate to constrain zoning decisionmakers. The Article goes on to demonstrate that this framework explains the results, even if not the language, in the vast majority of zoning cases that raise finality issues

Zoning Finality: Reconceptualizing Res Judicata Doctrine in Land Use Cases

Zoning disputes provide many Americans with their only firsthand exposure to the workings of democratic government. Land use issues trigger participation because neighbors perceive the wrong kind of development as posing a double-barreled threat to the stability of the community in which they have chosen to live and to the economic value of their homes. The protagonists in zoning disputes-landowners and neighbors-invest time and other resources to persuade the relevant decisionmakers to rule in the protagonists’ favor. When the parties make that investment, should they assume that a decision made today will have some enduring significance? Whether the decision is “final” may play an important role in shaping the parties’ participation and presentations. If a zoning board were free to deny a variance today and to grant the identical variance next week (or next year), there would be less reason for neighbors (and landowner applicants) to spend time and money framing their arguments for today’s decision. Many of the reasons that underlie res judicata doctrine apply to these local land use disputes. In the interest of conserving the resources of all parties- landowners, neighbors, and local decisionmakers-issues should be decided once, not multiple times. There is little reason to think that, were the issues decided multiple times, subsequent determinations would improve on prior ones. This is especially true in the context of land use, where the issues involve primarily questions of fact, and parties have incentives to come forward with all relevant information at the time the first decisionmaker considers the dispute. If a court, rather than a zoning board, were resolving the dispute, res judicata doctrine would circumscribe the power of a subsequent court to depart from the earlier determination. In the first instance, however, zoning disputes are resolved not by the courts, but by local legislatures and administrative bodies. No finality principle comparable to res judicata attaches to legislative determinations, no matter which legislative body-Congress, a state legislature, or a local city council- makes those determinations. Unlike most judicial decisions, which resolve discrete disputes over past events, legislatures act prospectively. Finality rules would preclude legislative decisionmakers from considering new facts that cast doubt on the wisdom of past decisions. It should not be surprising, then, that legislatures are typically free of finality constraints. In contrast to the well-established principles that apply to judicial and legislative determinations, the applicability of finality principles is unclear when it comes to administrative decisions by the local zoning board, such as the grant or denial of a variance. Courts sometimes treat zoning board decisions as if they were judicial decisions, using res judicata language to preclude new applications for relief that the zoning board previously denied. In other cases, courts-often from the same jurisdictions-permit boards to entertain applications virtually identical to previously rejected applications. Although courts sometimes suggest the need to be “flexible” in applying res judicata doctrine to zoning disputes, neither courts nor scholars have offered a coherent prescriptive or descriptive account for how that flexibility does or should operate. This Article has two related objectives: to develop a normative theory explaining how finality principles should apply in the land use context and simultaneously to argue that existing case law, however inarticulately, reflects that normative theory. Part I begins by exploring the distinctive structure of zoning doctrine, which fits imperfectly with traditional categorization of decisions as legislative or judicial. Part II examines more generally the role of finality in legal decisionmaking. Part III demonstrates that, in light of the structure of zoning doctrine, traditional claim preclusion doctrine should have no place in zoning law. This Article argues, by contrast, that issue preclusion doctrine should and does operate to constrain zoning decisionmakers. The Article goes on to demonstrate that this framework explains the results, even if not the language, in the vast majority of zoning cases that raise finality issues

Exhaled breath profiling for diagnosing acute respiratory distress syndrome

The acute respiratory distress syndrome (ARDS) is a common, devastating complication of critical illness that is characterized by pulmonary injury and inflammation. The clinical diagnosis may be improved by means of objective biological markers. Electronic nose (eNose) technology can rapidly and non-invasively provide breath prints, which are profiles of volatile metabolites in the exhaled breath. We hypothesized that breath prints could facilitate accurate diagnosis of ARDS in intubated and ventilated intensive care unit (ICU) patients. Prospective single-center cohort study with training and temporal external validation cohort. Breath of newly intubated and mechanically ventilated ICU-patients was analyzed using an electronic nose within 24 hours after admission. ARDS was diagnosed and classified by the Berlin clinical consensus definition. The eNose was trained to recognize ARDS in a training cohort and the diagnostic performance was evaluated in a temporal external validation cohort. In the training cohort (40 patients with ARDS versus 66 controls) the diagnostic model for ARDS showed a moderate discrimination, with an area under the receiver-operator characteristic curve (AUC-ROC) of 0.72 (95%-confidence interval (CI): 0.63-0.82). In the external validation cohort (18 patients with ARDS versus 26 controls) the AUC-ROC was 0.71 [95%-CI: 0.54 - 0.87]. Restricting discrimination to patients with moderate or severe ARDS versus controls resulted in an AUC-ROC of 0.80 [95%-CI: 0.70 - 0.90]. The exhaled breath profile from patients with cardiopulmonary edema and pneumonia was different from that of patients with moderate/severe ARDS. An electronic nose can rapidly and non-invasively discriminate between patients with and without ARDS with modest accuracy. Diagnostic accuracy increased when only moderate and severe ARDS patients were considered. This implicates that breath analysis may allow for rapid, bedside detection of ARDS, especially if our findings are reproduced using continuous exhaled breath profiling. NTR2750, registered 11 February 201

Photon collection from a trapped ion--cavity system

We present the design and implementation of a trapped ion cavity QED system. A single ytterbium ion is confined by a micron-scale ion trap inside a 2 mm optical cavity. The ion is coherently pumped by near resonant laser light while the cavity output is monitored as a function of pump intensity and cavity detuning. We observe a Purcell enhancement of scattered light into the solid angle subtended by the optical cavity, as well as a three-peak structure arising from strongly driving the atom. This system can be integrated into existing atom{photon quantum network protocols and is a pathway towards an efficient atom{photon quantum interface

Het nieuwe telen : energie onder de knie : komkommer

Vanuit het idee dat energiezuinig telen bereikt kan worden door goede isolatie, beheersing van de luchtvochtigheid en aanpassing van het teeltplan is project Het Nieuwe Telen komkommer uitgevoerd. Als doelstelling is geformuleerd een energieinput voor warmte van gelijk aan 25 m3 aardgas en handhaving van de de productie op 80 kg of wel 200 stuks per m2. Om de haalbaarheid van deze doelstelling te onderzoeken is een afdeling van 1000 m2 uitgerust met drie schermen- één vast folie en twee beweegbare schermen- en een installatie voor geavanceerde ventilatie